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USD 70 /hr
Hire Dr. Supriya C.
United Kingdom
USD 70 /hr

Engineering Research Expert 20+ Yrs Exp | Materials, Manufacturing & Nanotechnology | Scientific Writing & Grant Support

Profile Summary
Subject Matter Expertise
Services
Writing Technical Writing
Research Scientific and Technical Research
Consulting Scientific and Technical Consulting
Data & AI Data Processing
Product Development Material Sourcing, Device Fabrication
Work Experience

Lecturer

Ulster University

September 2019 - Present

Scientist

International Advanced Research Centre for Powder Metallurgy and New Materials

September 2018 - July 2019

Research Associate

University of Ulster at Jordanstown

December 2015 - August 2017

Researcher

Università degli Studi Roma Tre

April 2015 - December 2015

Postdoctoral researcher

University of Cincinnati

February 2008 - April 2010

Postdoctoral researcher

University of Dayton

May 2007 - January 2008

Researcher

Osaka Science and Technology Center

October 2004 - March 2007

Education

MBA

University of Cincinnati, USA

June 2008 - June 2010

PhD (Materials Science)

Jadavpur University

March 2001 - December 2004

MSc (Physics)

Jadavpur University

April 1998 - December 2000

Certifications
  • Certification details not provided.
Publications
JOURNAL ARTICLE
Supriya Chakrabarti, Sameh Khalil, Abhijit Ganguly, Davide Mariotti (2025). Transformation study and characterization of Cu-BTC MOF-derived nanoporous copper oxide . Materials Horizons.
Transformation study and characterization of Cu-BTC MOF-derived nanoporous copper oxide @article{cc76e9fb937447538a38155f9e50dd3e, title = "Transformation study and characterization of Cu-BTC MOF-derived nanoporous copper oxide", abstract = "This study provides a systematic and comprehensive investigation of the transformation process of copper-based metal–organic frameworks (Cu-BTC MOFs) into nanoporous copper oxides (P-CuOx) through controlled calcination. While calcination is a well-established method for producing MOF-derived oxides, previous studies have primarily focused on their applications. Most of them often lack detailed exploration of the transformation process and decomposition mechanisms though it is crucial for achieving tunability in MOF-derived structures. Our study addresses this gap by offering valuable insights that can guide the production of various MOF-derived oxides with tunable structural and functional properties. In this report, we have meticulously analysed the combined effects of calcination parameters, including temperature (250–500 °C), heating rate (0.5–10 °C min−1), and duration (1 and 2 hours) on the phase transformation, morphological features, and optical properties of Cu-BTC during its transformation to P-CuOx. Results revealed that fine adjustments to these calcination parameters allow precise control over phase purity, surface area, and porosity, achieving a high surface area of 113 m2 g−1 for derived P-CuO. Furthermore, the P-CuOx materials exhibited strong visible-light absorption, highlighting their potential for solar energy harvesting applications. This approach opens opportunities for designing advanced materials with customized performance characteristics. The findings have broad applicability and enable the research community to fully exploit MOF-derived oxides for designing advanced materials with customized properties for diverse applications, including energy, sensing, and biomedical.", keywords = "Nanoporous structures, MOF-derived copper oxides, Cu-BTC, Calcination, Phase transformation", author = "Sameh Khalil and Abhijit Ganguly and Davide Mariotti and Supriya Chakrabarti", note = "Publisher Copyright: {\textcopyright} 2024 The Royal Society of Chemistry.", year = "2024", month = nov, day = "5", doi = "10.1039/D4MH01085J", language = "English", volume = "12", pages = "862--876", journal = "Materials Horizons", issn = "2051-6355", publisher = "Royal Society of Chemistry (RSC)", number = "3", } . Materials Horizons.
Experimental investigation on the performance of MXene/C-dot hybrid nanofluid-based photovoltaic/thermal system: An Energy, Exergy, and Enviro-Economic analysis @article{1590b5d51ce141e89447caddffd9d061, title = "Experimental investigation on the performance of MXene/C-dot hybrid nanofluid-based photovoltaic/thermal system: An Energy, Exergy, and Enviro-Economic analysis", abstract = "Nanofluids (NFs) with exceptional heat transfer properties are increasingly being adopted in solar collectors as heat transfer fluid (HTF). Hybrid photovoltaic thermal systems are becoming more popular because they increase overall efficiency by producing both high- and low-grade electricity. This research focuses on the application of thermally efficient NFs for enhancing the thermal and electrical output of a photovoltaic/thermal (PV/T) system. Indoor experimental investigation was conducted on the PV/T system to find the thermally efficient HTF. Carbon quantum dot (C-dot), MXene and MXene/C-dot hybrid NFs were selected for experimentation. Thermo-economic factors (thermal conductivity, volumetric heat capacity, thermal property degradation rate, and cost) were used to optimise the NFs{\textquoteright} concentration. Optimized C-dot, MXene, and hybrid NFs were used for experimentation in the PV/T system. Energy, exergy, and enviro-economic analysis was conducted on the PV/T system with each HTFs. The results show that the thermal efficiency of PV/T was enhanced by 5.39, 3.87, and 9.45 \% with C-dot, MXene and hybrid NFs, respectively. Hottel-Whillier-Bliss (HWB) analysis was performed on the collector from the generated experimental data. The analysis states that at zero heat loss conditions, the thermal efficiency of the PV/T was enhanced by 5.4 \% with the hybrid NF. The maximum CO2 emission from PV/T with C-dot, MXene, and hybrid NFs, were calculated to be around 2.024, 1.979, and 1.931 kgCO2/day, respectively. Emission cost reduction analysis states that the hybrid NF achieved the highest reduction of 0.02 \$/day which was a consid- erable decrement of 13.5 \% over the water-based PV/T system.", keywords = "Carbon quantum dot, Energy and exergy analysis, Enviro-economic analysis, Hybrid nanofluid, MXene, Photovoltaic/thermal collector", author = "Sreehari Sreekumar and Adrian Pugsley and Supriya Chakrabarti and Neil Hewitt and Jayanta Mondol and Nikhilkumar Shah", note = "Publisher Copyright: {\textcopyright} 2024 The Author(s)", year = "2024", month = aug, day = "1", doi = "10.1016/j.solmat.2024.112904", language = "English", volume = "272", pages = "1--23", journal = "Solar Energy Materials and Solar Cells", issn = "0927-0248", publisher = "Elsevier BV", } . Solar Energy Materials and Solar Cells.
Supriya Chakrabarti, Amir Farokh Payam, Sameh Khalil (2024). Synthesis and Characterization of MOF‐Derived Structures: Recent Advances and Future Perspectives . Small.
Metal-organic framework (MOF) dispersion based fluids for solar-thermal energy conversion @article{b0db930350d24206b5862d46aab0e7b9, title = "Metal-organic framework (MOF) dispersion based fluids for solar-thermal energy conversion", abstract = "This paper discusses the potential use of metal–organic framework (MOF) dispersion based fluids for solar-to-thermal energy conversion (STEC). For this, the optical and thermal characteristics of MOF dispersion were investigated, with MOFs dispersed in ethylene glycol (EG). This study is focused on three different MOF dispersions, namely ZIF8/EG, CuBTC/EG, and FeBTC/EG, each with varying concentrations of MOF particles. The results showed that FeBTC/EG at a concentration of 0.3 wt\% is the optimal fluid for STEC, exhibiting the highest absorption and STEC efficiency compared to the other two fluids. The study also highlights the trade-off between STEC efficiency and cost, as increasing the concentration of MOF particles decreases the specific absorption rate (SAR). Additionally, the paper evaluates the dispersion stability of FeBTC/EG over time, which is critical for practical STEC applications. The novelty of the paper lies in the use of MOF dispersion based fluids for STEC application, which has not been extensively studied before. This study provides valuable insights into the potential use of MOF/EG for STEC and highlights the importance of optimizing the concentration of MOF particles for efficient and cost-effective performance. This study also introduces the novel application of MOF dispersion based fluids for enhanced STEC performance, showcasing FeBTC/EG as a standout for its high efficiency and stability. It marks a significant stride in utilizing MOF materials for sustainable energy, emphasizing practical considerations of dispersion stability and cost-effectiveness in STEC systems.", keywords = "Heat transfer fluid (HTFs), MOF dispersion, Metal-organic framework (MOF), Porous structure nanofluid, Solar harvesting, Solar-thermal energy conversion (STEC)", author = "Moghaieb, \{Hussein Sayed\} and Sameh Khalil and Abhijit Ganguly and Paul Maguire and Davide Mariotti and Supriya Chakrabarti", note = "Publisher Copyright: {\textcopyright} 2024", year = "2024", month = may, day = "1", doi = "10.1016/j.solener.2024.112542", language = "English", volume = "273", pages = "1--11", journal = "Solar Energy", issn = "0038-092X", publisher = "Elsevier Ltd", } . Solar Energy.
Performance Prediction and Optimization of Nanofluid-Based PV/T Using Numerical Simulation and Response Surface Methodology @article{a4da0068abbc4a45b6b4f8e2c6bee6f8, title = "Performance Prediction and Optimization of Nanofluid-Based PV/T Using Numerical Simulation and Response Surface Methodology", abstract = "A numerical investigation was carried out in ANSYS Fluent{\textregistered} on a photovoltaic/thermal (PV/T) system with MXene/water nanofluid as heat transfer fluid (HTF). The interaction of different operating parameters (nanofluid mass fraction, mass flow rate, inlet temperature and incident radiation) on the output response of the system (thermal efficiency, electrical efficiency, thermal exergy efficiency, and electrical exergy efficiency) was studied using a predictive model generated using response surface methodology (RSM). The analysis of variance (ANOVA) method was used to evaluate the significance of input parameters affecting the energy and exergy efficiencies of the nanofluid-based PV/T system. The nanofluid mass flow rate was discovered to be having an impact on the thermal efficiency of the system. Electrical efficiency, thermal exergy efficiency, and electrical exergy efficiency were found to be greatly influenced by incident solar radiation. The percentage contribution of each factor on the output response was calculated. Input variables were optimized using the desirability function to maximize energy and exergy efficiency. The developed statistical model generated an optimum value for the mass flow rate (71.84 kgh−1), the mass fraction (0.2 wt\%), incident radiation (581 Wm−2), and inlet temperature (20 °C). The highest overall energy and exergy efficiency predicted by the model were 81.67\% and 18.6\%, respectively.", keywords = "nanofluid, CFD, response surface method, ANOVA, optimization", author = "Sreehari Sreekumar and Supriya Chakrabarti and Neil Hewitt and Jayanta Mondol and Nikhilkumar Shah", note = "Publisher Copyright: {\textcopyright} 2024 by the authors.", year = "2024", month = may, day = "1", doi = "10.3390/nano14090774", language = "English", volume = "14", pages = "1--26", journal = "Nanomaterials", issn = "2079-4991", publisher = "Multidisciplinary Digital Publishing Institute", number = "9", } . Nanomaterials.
Supriya Chakrabarti, Hussein Sayed Moghaieb, Sameh Khalil, Abhijit Ganguly, Paul Maguire, Davide Mariotti (2024). Metal-organic framework (MOF) dispersion based fluids for solar-thermal energy conversion . Solar Energy.
Supriya Chakrabarti, Sreehari Sreekumar, Neil Hewitt, Jayanta Deb Mondol, Nikhilkumar Shah (2024). Performance Prediction and Optimization of Nanofluid-Based PV/T Using Numerical Simulation and Response Surface Methodology . Nanomaterials.
Supriya Chakrabarti, Sreehari Sreekumar, Neil Hewitt, Jayanta Deb Mondol, Nikhilkumar Shah (2024). Performance Prediction and Optimization of Nanofluid-Based PV/T Using Numerical Simulation and Response Surface Methodology . Nanomaterials.
Supriya Chakrabarti, Abhijit Ganguly, Ruairi J. McGlynn, Adam Boies, Paul Maguire, Davide Mariotti (2024). Flexible Bifunctional Electrode for Alkaline Water Splitting with Long-Term Stability . ACS Applied Materials & Interfaces.
Flexible Bifunctional Electrode for Alkaline Water Splitting with Long-Term Stability @article{1a4f2b44a64646c6a3c981c9995d39bc, title = "Flexible Bifunctional Electrode for Alkaline Water Splitting with Long-Term Stability", abstract = "Progress in electrochemical water-splitting devices as future renewable and clean energy systems requires the development of electrodes composed of efficient and earth-abundant bifunctional electrocatalysts. This study reveals a novel flexible and bifunctional electrode (NiO@CNTR) by hybridizing macroscopically assembled carbon nanotube ribbons (CNTRs) and atmospheric plasma-synthesized NiO quantum dots (QDs) with varied loadings to demonstrate bifunctional electrocatalytic activity for stable and efficient overall water-splitting (OWS) applications. Comparative studies on the effect of different electrolytes, e.g., acid and alkaline, reveal a strong preference for alkaline electrolytes for the developed NiO@CNTR electrode, suggesting its bifunctionality for both HER and OER activities. Our proposed NiO@CNTR electrode demonstrates significantly enhanced overall catalytic performance in a two-electrode alkaline electrolyzer cell configuration by assembling the same electrode materials as both the anode and the cathode, with a remarkable long-standing stability retaining ∼100\% of the initial current after a 100 h long OWS run, which is attributed to the “synergistic coupling” between NiO QD catalysts and the CNTR matrix. Interestingly, the developed electrode exhibits a cell potential (E10) of only 1.81 V with significantly low NiO QD loading (83 μg/cm2) compared to other catalyst loading values reported in the literature. This study demonstrates a potential class of carbon-based electrodes with single-metal-based bifunctional catalysts that opens up a cost-effective and large-scale pathway for further development of catalysts and their loading engineering suitable for alkaline-based OWS applications and green hydrogen generation.", keywords = "bifunctional and flexible electrode, macroscopically assembled carbon nanotube (CNT) ribbons, nickel oxides (NiO) quantum dots (QDs), plasma-induced nonequilibrium electrochemistry (PiNE), hydrogen evolution reaction (HER), oxygen evolution reaction (OER), water electrolysis, overall water splitting (OWS) in alkaline media, alkaline electrolyzer cell, long-term OWS stability", author = "Abhijit Ganguly and Mcglynn, \{Ruairi j.\} and Adam Boies and Paul Maguire and Davide Mariotti and Supriya Chakrabarti", note = "Publisher Copyright: {\textcopyright} 2024 The Authors. Published by American Chemical Society.", year = "2024", month = feb, day = "29", doi = "10.1021/acsami.3c12944", language = "English", volume = "16", pages = "12339--12352", journal = "ACS Applied Materials \& Interfaces", issn = "1944-8244", publisher = "American Chemical Society", number = "10", } . ACS Applied Materials & Interfaces.
Thermo-optical characterization of novel MXene/Carbon-dot hybrid nanofluid for heat transfer applications @article{573aef6fb8e24caab5831a34c569442d, title = "Thermo-optical characterization of novel MXene/Carbon-dot hybrid nanofluid for heat transfer applications", abstract = "Nanofluid has emerged as a promising heat transfer fluid (HTF) due to their significant thermophysical, and optical characteristics enhancement over base fluids. Hybrid nanofluids with multiple nanomaterials have the advantage of synergistic properties in comparison to monocomponent nanofluids. The present study proposes an energy-efficient and cleaner synthesis method for developing carbon quantum dot (C-dot), MXene, and a hybrid MXene/C-dot hybrid nanofluids, for heat transfer application. In-situ microwave pyrolysis technique and two-step method were adopted for nanomaterial and nanofluid synthesis. The morphological, phase structural, chemical, and elemental compositional analysis of the nanomaterials was performed. The material characterization confirms the hybridization of C-dot on MXene nanosheets. The thermal conductivity and volumetric heat capacity of the nanofluids were measured using the transient plane source (TPS) method. Thermal conductivity was observed to increase with nanofluid concentration and temperature. Results indicate that MXene has the highest thermal conductivity enhancement (50 \%) over water, followed by hybrid (42.2 \%) and C-dot nanofluid (33.2 \%). The volumetric heat capacity of nanofluids decreased with concentration and temperature. A semi-empirical correlation, as a function of nanofluid concentration and temperature, was coined for predicting thermal conductivity and volumetric heat capacity. Optical property characterization study shows that C-dot nanofluid exhibited considerable absorption along the UV range, while MXene nanofluid showed absorption in the visible and near-infrared (NIR) region. Hybrid nanofluids demonstrated complementary absorption properties of C-dot and MXene nanofluids.", keywords = "Hybrid nanofluid, MXene, Carbon dot, Thermal conductivity, Volumetric heat capacity", author = "Sreehari SREEKUMAR and Abhijit Ganguly and Sameh Khalil and Supriya Chakrabarti and Neil Hewitt and Jayanta Mondol and Nikhilkumar Shah", note = "Publisher Copyright: {\textcopyright} 2023 The Authors", year = "2024", month = jan, day = "1", doi = "10.1016/j.jclepro.2023.140395", language = "English", volume = "434", pages = "1--17", journal = "Journal of Cleaner Production", issn = "0959-6526", publisher = "Elsevier Ltd", } . Journal of Cleaner Production.
Supriya Chakrabarti, Ruairi McGlynn, Paul Brunet, Abhijit Ganguly, Hussein Moghaieb, Zheng Bo, Paul Maguire, Davide Mariotti (2024). A Single‐Step Process to Produce Carbon Nanotube‐Zinc Compound Hybrid Materials . Small Methods.
Supriya Chakrabarti, Sreehari Sreekumar, Abhijit Ganguly, Sameh Khalil, Neil Hewitt, Jayanta Deb Mondol, Nikhilkumar Shah (2024). Thermo-optical characterization of novel MXene/Carbon-dot hybrid nanofluid for heat transfer applications . Journal of Cleaner Production.
A Single‐Step Process to Produce Carbon Nanotube‐Zinc Compound Hybrid Materials @article{e05b02c6f8654a3b94d2e5ef30d6e3be, title = "A Single‐Step Process to Produce Carbon Nanotube‐Zinc Compound Hybrid Materials", abstract = "An atmospheric‐pressure plasma system is developed and is used to treat carbon nanotube assemblies, producing a hybrid carbon‐zinc structure. This system is integrated into a floating‐catalyst chemical vapor deposition furnace used for the synthesis of macroscopic assemblies of carbon nanotubes to allow for the in‐line, continuous, and single‐step production of nano‐composite materials. Material is deposited from a sacrificial zinc wire in the form of nanoparticles and can coat the surface of the individual carbon nanotubes as they form. Additionally, it is found that the deposited materials penetrate further into the carbon nanotube matrix than a comparable post‐synthesis deposition, improving the uniformity of the material through the thickness. Thus, a single‐step metal‐based coating and carbon nanotube synthesis process which can form the basis of production scale manufacturing of metal‐carbon nanotube composite materials with an atmospheric‐pressure plasma system are demonstrated.", keywords = "single‐step process, carbon nanotubes, hybrid materials, zinc, composites, single-step process", author = "Ruairi McGlynn and Paul Brunet and Supriya Chakrabarti and Abhijit Ganguly and Hussein Moghaieb and Zheng Bo and Paul Maguire and Davide Mariotti", note = "Funding Information: R.M. and P.B. contributed equally to this work. The authors would like to acknowledge the EPRSC for supporting this work through EP/M015211/1, EP/R008841/1, and EP/V055232/1. Publisher Copyright: {\textcopyright} 2023 The Authors. Small Methods published by Wiley-VCH GmbH.", year = "2023", month = nov, day = "23", doi = "10.1002/smtd.202300710", language = "English", volume = "8", pages = "1--12", journal = "Small Methods", issn = "2366-9608", publisher = "John Wiley and Sons Ltd", number = "1", } . Small Methods.
Supriya Chakrabarti, Hussein Sayed Moghaieb, Vincenzo Amendola, Sameh Khalil, Paul Maguire, Davide Mariotti (2023). Nanofluids for Direct-Absorption Solar Collectors—DASCs: A Review on Recent Progress and Future Perspectives . Nanomaterials.
Supriya Chakrabarti, Hussein Sayed Moghaieb, Vincenzo Amendola, Sameh Khalil, Paul Maguire, Davide Mariotti (2023). Nanofluids for Direct-Absorption Solar Collectors—DASCs: A Review on Recent Progress and Future Perspectives . Nanomaterials.
Fabrication of Silicon Carbide Nanocrystals by Electrical Discharge and Laser-Induced Processes in Solution @article{06498093743b40c7ac85aa388408e4ff, title = "Fabrication of Silicon Carbide Nanocrystals by Electrical Discharge and Laser-Induced Processes in Solution", abstract = "The capabilities of the liquid assisted electrical discharge technique with additional laser irradiation of colloids for the synthesis of SiC nanocrystals (NCs) have been studied. For optimization of the conditions for the binary NCs formation, the characterization of inner structure, phase composition and morphology was performed by means of high resolution transmission electron microscopy, selected area electron diffraction, X-Ray photoelectron spectroscopy, Raman and Fourier-transform infrared spectroscopy. The results of the characterization proved the formation of near-spherical SiC NCs having two-peak size distribution with average diameter of 3.7 and 11.4 nm before and 2.3 nm after additional laser treatment. The possible mechanism of nanostructured SiC formation has been discussed. The developed technique is expected to be effective for fabrication of SiC NCs as a promising material for optoelectronic devices.", keywords = "Chemical interactions, Electrical discharge in liquid, Laser irradiation, Silicon carbide nanoparticles", author = "Alena Nevar and Natalie Tarasenka and Mikhail Nedelko and Supriya Chakrabarti and Tamilselvan Velusamy and Davide Mariotti and Nikolai Tarasenko", note = "Funding Information: The work was partially supported by the National Academy of Sciences of Belarus under project Convergence 2.2.05 and by the Belarusian Foundation for Fundamental Research under Grant No. F21KOR-006. Publisher Copyright: {\textcopyright} 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.", year = "2022", month = sep, day = "30", doi = "10.1007/s11090-022-10266-y", language = "English", volume = "42", pages = "1085--1099", journal = "Plasma Chemistry and Plasma Processing", issn = "1572-8986", publisher = "Springer New York", number = "5", } . Plasma Chemistry and Plasma Processing.
Fabrication of Silicon Carbide Nanocrystals by Electrical Discharge and Laser-Induced Processes in Solution <head> <META HTTP-EQUIV="Refresh" CONTENT="0;URL=/servlet/useragent"> </head> . Plasma Chemistry and Plasma Processing.
Supriya Chakrabarti, Nikhil Bhalla, Preetam Kumar Sharma (2022). Elucidating Sensitivity and Stability Relationship of Gold–Carbon Hybrid LSPR Sensors Using Principal Component Analysis . ACS Omega.
Hybrid Plasma−Liquid Functionalisation for the Enhanced Stability of CNT Nanofluids for Application in Solar Energy Conversion @article{b56cf3b4bde646ad83b12b32ad848338, title = "Hybrid Plasma−Liquid Functionalisation for the Enhanced Stability of CNT Nanofluids for Application in Solar Energy Conversion", abstract = "Macroscopic ribbon-like assemblies of carbon nanotubes (CNTs) are functionalised using a simple direct-current-based plasma−liquid system, with oxygen and nitrogen functional groups being added. These modifications have been shown to reduce the contact angle of the ribbons, with the greatest reduction being from 84° to 35°. The ability to improve the wettability of the CNTs is of paramount importance for producing nanofluids, with relevance for a number of applications. Here, in particular, we investigate the efficacy of these samples as nanofluid additives for solar−thermal harvesting. Surface treatments by plasma-induced non-equilibrium electrochemistry are shown to enhance the stability of the nanofluids, allowing for full redispersion under simulated operating conditions. Furthermore, the enhanced dispersibility results in both a larger absorption coefficient and an improved thermal profile under solar simulation.", keywords = "solar–thermal, plasma functionalisation, carbon nanotubes", author = "McGlynn, \{Ruairi J.\} and Moghaieb, \{Hussein S.\} and Paul Brunet and Supriya Chakrabarti and Paul Maguire and Davide Mariotti", note = "Funding Information: The authors would like to acknowledge the EPRSC for supporting this work through EP/M015211/1 and EP/R008841/1. Publisher Copyright: {\textcopyright} 2022 by the authors.", year = "2022", month = aug, day = "6", doi = "10.3390/nano12152705", language = "English", volume = "12", journal = "Nanomaterials", issn = "2079-4991", publisher = "Multidisciplinary Digital Publishing Institute", number = "15", } . Nanomaterials.
Fabrication of luminescent silicon carbide nanoparticles by pulsed laser synthesis in liquid @article{da2d7d7a05f84514a4b3a90e57a9c8dc, title = "Fabrication of luminescent silicon carbide nanoparticles by pulsed laser synthesis in liquid", abstract = "The capabilities of liquid-assisted laser ablation technique with additional laser irradiation of solutions for the synthesis of SiC nanocrystals (NCs) have been investigated. Nanocrystalline particles of silicon carbide were synthesized by laser irradiation of the mixture of Si and C colloidal solutions using nanosecond and femtosecond laser radiation. For optimization of the conditions for the binary nanoparticles (NPs) formation, the characterization of inner structure, phase composition and morphology was performed by means of high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), X-ray photoelectron (XPS), Raman and Fourier-transform infrared (FTIR) spectroscopy and correlation of NPs properties with laser irradiation conditions were found. The characterization results proved the formation of near-spherical SiC NCs which exhibited photoluminescence (PL) in the broad spectral region of 350–600 nm. The origin of the observed photoluminescence is attributed to quantum confinement in small NCs, radiative recombination of photogenerated charge carriers, surface defects or silicon oxycarbide phases. The developed simple approach enables synthesis of colloidal SiC NPs that potentially satisfy the requirements of good dispersibility, stability and efficient PL for applications in biological labeling.", keywords = "Silicon carbide nanoparticles, Laser ablation, Laser-induced modification, Chemical interactions, Luminescent nanocrystals", author = "Natalie Tarasenka and Vladislav Kornev and Mikalai Rzheutski and Evgenii Lutsenko and Supriya Chakrabarti and Tamilselvan Velusamy and Davide Mariotti and Nikolai Tarasenko", note = "Funding Information: The work was partially financed by the National Academy of Sciences of Belarus under project Convergence 2.2.05 and by the Belarusian Foundation for Fundamental Research under Grants No. F21RM-105 and No. F21KOR-006. This work was also partially supported by EPSRC (award n. EP/M024938/1). The authors also acknowledge Dr. Aleksander Stupak for luminescence measurements, valuable discussions and comments. Publisher Copyright: {\textcopyright} 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.", year = "2022", month = aug, day = "5", doi = "10.1007/s00339-022-05894-2", language = "English", volume = "128", journal = "Applied Physics A", issn = "1432-0630", publisher = "Springer Heidelberg", number = "9", } . Applied Physics A.
High degree of N-functionalization in macroscopically assembled carbon nanotubes @article{2318ba733fda40a89c4685b1cf25e917, title = "High degree of N-functionalization in macroscopically assembled carbon nanotubes", abstract = "Nitrogen doping of carbon nanomaterials has emerged as a method to develop novel material properties, though limitations in the form of extended treatment times, harsh chemical usage and limited total nitrogen content exist. Here, macroscopic ribbon-like assemblies of carbon nanotubes are functionalized with nitrogen using a simple direct current-based plasma–liquid system. This system utilizes the plasma-generated species in an ethanol:water solution with ethylenediamine as a nitrogen precursor for the nitrogen functionalization of the carbon nanotube assembly. These unique, plasma-generated species and pathways enable rapid and high levels of functionalization with the atomic concentration of nitrogen reaching 22.5\%, with amine groups, pyrrolic groups and graphitic nitrogen observed in the X-ray photoelectron spectra, the highest ever achieved. This nitrogen content is demonstrated to be significantly higher than a comparative electrolysis process. This demonstrates that this plasma process enhances the availability of nitrogen from the ethylenediamine precursor, facilitating greater functionalization.", keywords = "Chemical Routes to Materials, Chemical routes to materials", author = "McGlynn, \{Ruairi J.\} and Paul Brunet and Supriya Chakrabarti and Adam Boies and Paul Maguire and Davide Mariotti", note = "Funding Information: The authors would like to acknowledge the EPRSC for supporting this work through EP/M015211/1 and EP/R008841/1. Publisher Copyright: {\textcopyright} 2022, The Author(s).", year = "2022", month = jul, day = "31", doi = "10.1007/s10853-022-07463-7", language = "English", volume = "57", pages = "13314--13325", journal = "Journal of Materials Science", issn = "0022-2461", publisher = "Springer", number = "28", } . Journal of Materials Science.
Elucidating Sensitivity and Stability Relationship of Gold–Carbon Hybrid LSPR Sensors Using Principal Component Analysis @article{2acd9f8828584cb2afef8150a2697ecb, title = "Elucidating Sensitivity and Stability Relationship of Gold–Carbon Hybrid LSPR Sensors Using Principal Component Analysis", abstract = "Sensitive localized surface plasmon resonance (LSPR) sensing is achieved using nanostructured geometries of noble metals which typically have dimensions less than 100 nm. Among the plethora of geometries and materials, the spherical geometries of gold (Au) are widely used to develop sensitive bio/chemical sensors due to ease of manufacturing and biofunctionlization. One major limitation of spherical-shaped geometries of Au, used for LSPR sensing, is their low refractive index (RI) sensitivity which is commonly addressed by adding another material to the Au nanostructures. However, the process of addition of new material on Au nanostructures, while retaining the LSPR of Au, often comes with a trade-off which is associated with the instability of the developed composite, especially in harsh chemical environments. Addressing this challenge, we develop a Au-graphene-layered hybrid (Au-G) with high stability (studied up to 2 weeks here) and enhanced RI sensitivity (a maximum of 180.1 nm/RIU) for generic LSPR sensing applications using spherical Au nanostructures in harsh chemical environments, involving organic solvents. Additionally, by virtue of principal component analysis, we correlate stability and sensitivity of the developed system. The relationship suggests that the shelf life of the material is proportional to its sensitivity, while the stability of the sensor during the measurement in liquid environment decreases when the sensitivity of the material is increased. Though we uncover this relationship for the LSPR sensor, it remains evasive to explore similar relationships within other optical and electrochemical transduction techniques. Therefore, our work serves as a benchmark report in understanding/establishing new correlations between sensing parameters.", keywords = "General Chemical Engineering, General Chemistry", author = "Nikhil Bhalla and Sharma, \{Preetam Kumar\} and Supriya Chakrabarti", note = "Funding Information: All authors thank Ulster University for its support for open access publication charges for this manuscript. N.B. and P.K.S. would like to thank support from the Department of Economy, Northern Ireland, in the form of a GCRF-Primer grant, and S.C. thanks the support of the Department of Economy, Northern Ireland, under the US-Ireland R\&D Partnership Programme, reference number: USI160. Publisher Copyright: {\textcopyright} 2022 American Chemical Society. All rights reserved.", year = "2022", month = jul, day = "27", doi = "10.1021/acsomega.2c03326", language = "English", volume = "7", pages = "27664--27673", journal = "ACS Omega", issn = "2470-1343", publisher = "ACS Publications", number = "31", } . ACS Omega.
Supriya Chakrabarti, Sreehari Sreekumar, Nikhilkumar Shah, Jayanta Deb Mondol, Neil Hewitt (2022). Numerical investigation and feasibility study on MXene/water nanofluid based photovoltaic/thermal system . Cleaner Energy Systems.
Numerical Investigation and Feasibility Study on MXene/Water Nanofluid Based Photovoltaic/thermal System @article{0ff70edde1904b55b1bf144b3598bc10, title = "Numerical Investigation and Feasibility Study on MXene/Water Nanofluid Based Photovoltaic/thermal System", abstract = "Nanofluid is increasingly adopted in solar collectors as they play a significant role in enhancing the heat transfer process. In this study, a 3D numerical simulation of a nanofluid-based photovoltaic/thermal (N-PV/T) system with MXene nanofluid as heat transfer fluid, was conducted using the finite volume method (FVM). A feasibility analysis was performed on the proposed N-PV/T system. Enviro-economic analysis was also performed from an energy and exergy perspective. The numerical simulation model was validated with experimental and numerical data in the literature and has a minimal error of about 2.75\% and 8.9\%, respectively. Results indicated that MXene nanofluid of 0.2wt\% achieved a percentage enhancement of 3.5\% and 17\% electrical efficiency and thermal efficiency, respectively, over water. The 0.2wt\% MXene nanofluid achieved the highest heat transfer coefficient (HTC) of 261.95 Wm−2K−1 at a mass flow rate of 90 kgh−1. Also, 0.2wt\% nanofluid produced a significant HTC improvement of about 21.42\% over water at a flow rate of 40 kgh−1. The study showed that MXene nanofluid could effectively reduce the PV surface temperature by 10\% compared to water. System size optimization study proved that a 4.5 -14.5\% reduction in the size of PV/T could be achieved with MXene nanofluid. Enviroeconomic analysis showed that the 0.2wt\% nanofluid generated the least emission rate and emission cost according to energy (0.42 kgCO2/day, and 0.028224 \$/day) and exergy-based analysis (0.48 kgCO2/day, and 0.032 \$/day).", keywords = "MXene nanofluid, Nanofluid based PV/T, CFD, Enviro-economic analysis", author = "Sreehari Sreekumar and Nikhilkumar Shah and Jayanta Mondol and Neil Hewitt and Supriya Chakrabarti", year = "2022", month = jun, day = "20", doi = "10.1016/j.cles.2022.100010", language = "English", volume = "2", journal = "Cleaner Energy Systems", issn = "2772-7831", publisher = "Elsevier", } . Cleaner Energy Systems.
A solid-liquid two-phase precipitation method for the growth of fullerene (C60) nanowires @article{58f0aec1be9a45289d855fd7d11bdeb2, title = "A solid-liquid two-phase precipitation method for the growth of fullerene (C60) nanowires", abstract = "A novel solid-liquid two-phase precipitation (SLTPP) method, utilising a solidified (vialiquid N 2)m-xylene solution of C 60with liquid isopropanol (IPA) as a counter-solvent, is proposed for the synthesis of fullerene (C 60) nanowires. The resulting C 60nanowires were observed to possess high crystallinity and a length-to-diameter ratio of up to several thousands with a diameter as small as ∼85 nm. We further systematically investigated the effects of the C 60concentration (1-5.2 mg ml −1) and solvent-counter-solvent ratio (1 : 6-2 : 1) to optimise the growth conditions for high-quality, size-controlled C 60nanowires. A comparative study on the widely-used liquid-liquid interfacial precipitation (LLIP) method showed that the proposed SLTPP method led to a much narrower diameter distribution (414.20 ± 92.10 nmvs.3237.20 ± 1790.30 nm for LLIP) across the studied range of the C 60concentrations and solvent-counter-solvent ratios, and is therefore considered to be a more stable and reliable synthesis route. We propose that the gradual melting of them-xylene C 60solid-phase leads to slower diffusion of the solvent-counter-solvent medium, providing a much more stable interface for high-quality crystal growth. ", author = "Xiao Fan and Junfeng Geng and Navneet Soin and Supriya Chakrabarti and Somak Mitra and Iman Roqan and Hua Li and Mustapha Babatunde and Andy Baldwin", note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2021.", year = "2021", month = jul, day = "27", doi = "10.1039/D1CE00413A", language = "English", volume = "36", pages = "6340--6348", journal = "CrystEngComm", issn = "1466-8033", publisher = "Royal Society of Chemistry", number = "36", } . CrystEngComm.
Functionalized Carbon Nanotube and MnO2 Nanoflower Hybrid as an Electrode Material for Supercapacitor Application @article{f6a6c1b17196439ab082385213d1f834, title = "Functionalized Carbon Nanotube and MnO2 Nanoflower Hybrid as an Electrode Material for Supercapacitor Application", abstract = "Functionalized carbon nanotube (FCNT) and Manganese Oxide (MnO 2) nanoflower hybrid material was synthesized using hydrothermal technique as a promising electrode material for supercapacitor applications. The morphological investigation revealed the formation of nanoflower like structure of MnO 2 connected with FCNT, thus paving an easy path for the conduction of electrons during the electrochemical mechanism. A significant improvement in capacitance properties was observed in the hybrid material, in which carbon nanotube acts as a conducting cylindrical path, while the major role of MnO 2 was to store the charge, acting as an electrolyte reservoir leading to an overall improved electrochemical performance. The full cell electrochemical analysis of FCNT-MnO 2 hybrid using 3 M potassium hydroxide (KOH) electrolyte indicated a specific capacitance of 359.53 F g-1, specific energy of 49.93 Wh kg-1 and maximum specific power of 898.84 W kg-1 at 5 mV s-1. The results show promise for the future of supercapacitor development based on hybrid electrode materials, where high specific energy can be achieved along with high specific power and long cycle life. ", keywords = "FCNT-MnO2, hydrothermal, specific energy, specific power, supercapacitor, Specific energy, Specific power, FCNT-MnO, Supercapacitor, Hydrothermal", author = "Sagar Mothkuri and Honey Gupta and Jain, \{Pawan K\} and Rao, \{Tata Narsinga\} and Gade Padmanabham and Supriya Chakrabarti", note = "Funding Information: Funding: The research was supported by the Centre for Carbon Materials and the Centre for Materials Characterization of International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, P.O. Balapur, Telangana 500005, India. Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.", year = "2021", month = feb, day = "20", doi = "10.3390/mi12020213", language = "English", volume = "12", journal = "Micromachines", issn = "2072-666X", publisher = "Multidisciplinary Digital Publishing Institute", number = "2", } . Micromachines.
Mothkuri, Sagar and Gupta, Honey and Jain, Pawan K. and Rao, Tata Narsinga and Padmanabham, G. and Chakrabarti, Supriya(2021). Functionalized Carbon Nanotube and MnO2 Nanoflower Hybrid as an Electrode Material for Supercapacitor Application . Micromachines. 12. (2).
Plasma-induced non-equilibrium electrochemistry synthesis of nanoparticles for solar thermal energy harvesting @article{f7fcb7a264934eec8311313555c9352c, title = "Plasma-induced non-equilibrium electrochemistry synthesis of nanoparticles for solar thermal energy harvesting", abstract = "Rapid plasma-induced non-equilibrium electrochemistry (PiNE) at atmospheric pressure was used to prepare surfactant-free gold nanoparticles and copper oxide quantum dots. A suite of chemical and physical characterisation is carried out to assess the as-prepared materials. Nanofluids comprised of these nanoparticles in ethylene glycol have been prepared. The energy absorptive properties of the prepared nanofluids were investigated as a potential additive to the traditional working fluids used in solar thermal collectors. The application feasibility has been assessed by calculating a value of power which could be transferred to the thermal fluid. This work demonstrates an alternative and rapid method to produce nanofluids for solar thermal conversion.", keywords = "Atmospheric pressure plasma, Copper oxide quantum dots, Direct absorption solar thermal collector, Gold nanoparticles, Stability", author = "Ruairi McGlynn and Supriya Chakrabarti and Bruno Alessi and Moghaieb, \{Hussein S.\} and Paul Maguire and Harjit Singh and Davide Mariotti", year = "2020", month = jun, day = "30", doi = "10.1016/j.solener.2020.04.004", language = "English", volume = "203", pages = "37 -- 45", journal = "Solar Energy", issn = "0038-092X", publisher = "Elsevier Ltd", } . Solar Energy.
(2020). Plasma-induced non-equilibrium electrochemistry synthesis of nanoparticles for solar thermal energy harvesting . Solar Energy.
Activated Functionalized Carbon Nanotubes and 2D Nanostructured MoS2 Hybrid Electrode Material for High‐Performance Supercapacitor Applications @article{fe37b5a7dfad4d7f862e895631e8ecae, title = "Activated Functionalized Carbon Nanotubes and 2D Nanostructured MoS2 Hybrid Electrode Material for High‐Performance Supercapacitor Applications", abstract = "Alkali-activated functionalized carbon nanotubes (AFCNTs) and 2D nanostructured MoS2 are investigated as a novel hybrid material for energy-storage applications. The nanoflower-like 2D MoS2 is grown on the surface of AFCNT using the controlled one-step hydrothermal technique. The activation of functionalized carbon nanotubes results in greater performance due to the improved surface area. The Brunauer–Emmett–Teller (BET) surface area of the AFCNTs is found to be 594.7 m2 g−1 which is almost 30 times of the as-prepared carbon nanotubes (CNTs). The improved surface area with attached hydroxyl and carboxylic functional groups helps in the attachment of MoS2 nanoflowers onto the AFCNT, thus reducing the interfacial resistance and providing an easy path for electron transfer. The electrochemical analysis shows a high specific capacitance of 516 F g−1 at 0.5 A g−1 with a corresponding energy density of 71.76 Wh kg−1, which is an encouraging reported value from AFCNT and MoS2 hybrid material. To the best of our knowledge, herein, the first report on AFCNTs and 2D MoS2 nanostructured hybrid electrode material for supercapacitor applications is provided, and promising results in terms of specific capacitance, energy density, and power density by boosting the properties of individual material are explained.", keywords = "activated functionalized carbon nanotubes, hybrid electrodes, molybdenum sulfide, supercapacitors", author = "Honey Gupta and Sagar Mothkuri and \{Mc Glynn\}, Ruairi and Darragh Carolan and Paul Maguire and Davide Mariotti and Jain, \{P. K.\} and Rao, \{Tata Narasinga\} and G. Padmanabham and Supriya Chakrabarti", year = "2020", month = may, day = "25", doi = "10.1002/pssa.201900855", language = "English", volume = "217", pages = "1--12", journal = "Physica Status Solidi (A) Applications and Materials Science", issn = "1862-6300", publisher = "Wiley-VCH Verlag", number = "10", } . Physica Status Solidi (A) Applications and Materials Science.
Supriya Chakrabarti, Ruairi James McGlynn, Paul Brunet, Conor Rocks, Davide Mariotti(2020). Hybrid Plasma-Liquid Treatment of Carbon Nanotubes for Application in Direct Absorption Solar Thermal Collectors . ECS Meeting Abstracts. {MA}2020-01. (17). p. 1128--1128. The Electrochemical Society
Supriya Chakrabarti, Paul Brunet, Ruairi James McGlynn, Paul Maguire, Davide Mariotti(2020). Plasma-Synthesized Nanoparticles for Hybrid CNT/Nanoparticles Composites . ECS Meeting Abstracts. {MA}2020-01. (17). p. 1117--1117. The Electrochemical Society
(2020). Activated Functionalized Carbon Nanotube and 2D Nanostructured MoS2 Hybrid Electrode Material for High Performance Supercapacitor Application . physica status solidi (a).
Honey Gupta, S. Chakrabarti, Sagar Mothkuri, Balaji Padya, T.N. Rao, P.K. Jain(2020). High performance supercapacitor based on 2D-MoS2 nanostructures . Materials Today: Proceedings. 26. p. 20--24. Elsevier {BV}
Sagar Mothkuri, S. Chakrabarti, Honey Gupta, Balaji Padya, T.N. Rao, P.K. Jain(2020). Synthesis of MnO2 nano-flakes for high performance supercapacitor application . Materials Today: Proceedings. 26. p. 142--147. Elsevier {BV}
Microplasma-synthesized ultra-small NiO nanocrystals, a ubiquitous hole transport material @article{999db02413b74914a2e75d5b89515122, title = "Microplasma-synthesized ultra-small NiO nanocrystals, a ubiquitous hole transport material", abstract = "We report on a one-step hybrid atmospheric pressure plasma-liquid synthesis of ultra-small NiO nanocrystals (2 nm mean diameter), which exhibit strong quantum confinement. We show the versatility of the synthesis process and present the superior material characteristics of the nanocrystals (NCs). The band diagram of the NiO NCs, obtained experimentally, highlights ideal features for their implementation as a hole transport layer in a wide range of photovoltaic (PV) device architectures. As a proof of concept, we demonstrate the NiO NCs as a hole transport layer for three different PV device test architectures, which incorporate silicon quantum dots (Si-QDs), nitrogen-doped carbon quantum dots (N-CQDs) and perovskite as absorber layers. Our results clearly show ideal band alignment which could lead to improved carrier extraction into the metal contacts for all three solar cells. In addition, in the case of perovskite solar cells, the NiO NC hole transport layer acted as a protective layer preventing the degradation of halide perovskites from ambient moisture with a stable performance for >70 days. Our results also show unique characteristics that are highly suitable for future developments in all-inorganic 3rd generation solar cells (e.g. based on quantum dots) where quantum confinement can be used effectively to tune the band diagram to fit the energy level alignment requirements of different solar cell architectures.", author = "Supriya Chakrabarti and Darragh Carolan and Bruno Alessi and Vladimir Svrcek and P Maguire and Davide Mariotti", year = "2019", month = dec, day = "3", doi = "10.1039/C9NA00299E", language = "English", volume = "1", pages = "4915--4925", journal = "Nanoscale Advances", issn = "2516-0230", publisher = "Royal Society of Chemistry", number = "12", } . Nanoscale Advances.
(2019). Synthesis of MnO2 nano-flakes for high performance supercapacitor application . Materials Today: Proceedings.
(2019). High performance supercapacitor based on 2D-MoS2 nanostructures . Materials Today: Proceedings.
Size-dependent stability of ultra-small α-/β-phase tin nanocrystals synthesized by microplasma @article{4d3ad45b10ba4de782123ddf0fa76f7f, title = "Size-dependent stability of ultra-small α-/β-phase tin nanocrystals synthesized by microplasma", abstract = "Nanocrystals sometimes adopt unusual crystal structure configurations in order to maintain structural stability with increasingly large surface-to-volume ratios. The understanding of these transformations is of great scientific interest and represents an opportunity to achieve beneficial materials properties resulting from different crystal arrangements. Here, the phase transformation from α to β phases of tin (Sn) nanocrystals is investigated in nanocrystals with diameters ranging from 6.1 to 1.6 nm. Ultra-small Sn nanocrystals are achieved through our highly non-equilibrium plasma process operated at atmospheric pressures. Larger nanocrystals adopt the β-Sn tetragonal structure, while smaller nanocrystals show stability with the α-Sn diamond cubic structure. Synthesis at other conditions produce nanocrystals with mean diameters within the range 2–3 nm, which exhibit mixed phases. This work represents an important contribution to understand structural stability at the nanoscale and the possibility of achieving phases of relevance for many applications.", author = "Haq, \{Atta Ul\} and Sadegh Askari and Anna McLister and Sean Rawlinson and James Davis and Supriya Chakrabarti and Vladimir Svrcek and Paul Maguire and Pagona Papakonstantinou and Davide Mariotti", year = "2019", month = feb, day = "18", doi = "10.1038/s41467-019-08661-9", language = "English", volume = "10", pages = "1--8", journal = "Nature Communications", issn = "2041-1723", publisher = "Nature Research", } . Nature Communications.
Chakrabarti, S., Carolan, D., Alessi, B., Maguire, P., Svrcek, V., Mariotti, D.(2019). Microplasma-synthesized ultra-small NiO nanocrystals, a ubiquitous hole transport material . Nanoscale Advances. 1. (12). p. 4915-4925.
Supriya Chakrabarti, Darragh Carolan, Bruno Alessi, Paul Maguire, Vladimir Svrcek, Davide Mariotti(2019). Microplasma-synthesized ultra-small NiO nanocrystals, a ubiquitous hole transport material . Nanoscale Advances. Royal Society of Chemistry ({RSC})
Haq, A.U., Askari, S., McLister, A., Rawlinson, S., Davis, J., Chakrabarti, S., Svrcek, V., Maguire, P., Papakonstantinou, P., Mariotti, D.(2019). Size-dependent stability of ultra-small α-/β-phase tin nanocrystals synthesized by microplasma . Nature Communications. 10. (1).
Metal nanoparticle‐hydrogel nanocomposites for biomedical applications – An atmospheric pressure plasma synthesis approach @article{da1e18ec026c4a7285d53e4bd2d69917, title = "Metal nanoparticle‐hydrogel nanocomposites for biomedical applications – An atmospheric pressure plasma synthesis approach", abstract = "The development of multifunctional nanocomposite materials is of great interest for various biomedical applications. A popular approach to produce tailored nanocomposites is to incorporate functional nanoparticles into hydrogels. Here, a benign atmospheric pressure microplasma synthesis approach has been deployed for the synthesis of metal and alloy NPs in‐situ in a poly (vinyl alcohol) hydrogel. The formation of gold, silver, and gold‐silver alloy NPs was confirmed via spectroscopic and microscopic characterization techniques. The properties of the hydrogel were not compromised during formation of the composites. Practical applications of the NP/PVA nanocomposites has been demonstrated by anti‐bacterial testing. This establishes AMP processing as a viable one‐step technique for the fabrication of NP/hydrogel composites, with potential multifunctionality for a range of biomedical applications.", keywords = "anti-bacterial composites, atmospheric pressure microplasma synthesis, biomedical materials, green synthesis, NP/hydrogel composites", author = "Hugo Nolan and Daye Sun and Falzon, \{Brian G.\} and Supriya Chakrabarti and Padmanaba, \{Dilli Babu\} and P Maguire and Davide Mariotti and Tao Yu and David Jones and Gavin Andrews and Dan Sun", note = "Funder: Engineering and Physical Sciences Research Council. Grant Number EP/P00394X/1", year = "2018", month = nov, day = "16", doi = "10.1002/ppap.201800112", language = "English", volume = "15", pages = "1--10", journal = "Plasma Processes and Polymers", issn = "1612-8850", publisher = "Wiley-VCH Verlag", number = "11", } . Plasma Processes and Polymers.
Nolan, H., Sun, D., Falzon, B.G., Chakrabarti, S., Padmanaba, D.B., Maguire, P., Mariotti, D., Yu, T., Jones, D., Andrews, G., et al.(2018). Metal nanoparticle-hydrogel nanocomposites for biomedical applications – An atmospheric pressure plasma synthesis approach . Plasma Processes and Polymers. 15. (11).
Structure and Optical Properties of Carbon Nanoparticles Generated by Laser Treatment of Graphite in Liquids @article{984ec1fd3e4945b19bf975445534f62c, title = "Structure and Optical Properties of Carbon Nanoparticles Generated by Laser Treatment of Graphite in Liquids", abstract = "In this paper, we report the one-step synthesis of luminescent carbon nanoparticles (NPs) via laser irradiation of a graphite target in a solvent H2O, ethanol, or a 0.008 m aqueous diethylenetriaminepentaacetic acid (DTPA) solution. This is a simple approach for the fabrication of carbon dots with tunable photoluminescence (PL) that differs from other preparation methods, as no post-passivation step is required. The unfocused beam of the second harmonic (wavelength 532 nm) of the Nd:YAG laser was used in our experiments. The sizes of the prepared NPs were mainly distributed in the range of 1–8 nm with an average value of 3 nm. Carbon NPs of different inner structure were prepared: hexagonal diamond phase in aqueous DTPA solution, orthorhombic carbon phase in ethanol, and amorphous carbon in water. The synthesized carbon NPs have strong luminescence in the visible region, which makes them attractive for numerous biological applications. The photoluminescence of the synthesized NPs was investigated at different excitation wavelengths, from 260 to 450 nm. The highest intensities of the emission bands were detected for an excitation wavelength of 400 nm.", keywords = "carbon dots, laser irradiation, nanoparticles, photoluminescence, structural defects", author = "Natalie Tarasenka and Aleksandr Stupak and Nikolai Tarasenko and Supriya Chakrabarti and D Mariotti", year = "2017", month = may, day = "5", doi = "10.1002/cphc.201601182", language = "English", volume = "18", pages = "1074--1083", journal = "ChemPhysChem", issn = "1439-7641", publisher = "Wiley-VCH Verlag", number = "9", } . ChemPhysChem.
Supriya Chakrabarti, Natalie Tarasenka, Aleksandr Stupak, Nikolai Tarasenko, Davide Mariotti(2017). Structure and Optical Properties of Carbon Nanoparticles Generated by Laser Treatment of Graphite in Liquids . ChemPhysChem. Wiley-Blackwell
Tarasenka, N., Stupak, A., Tarasenko, N., Chakrabarti, S., Mariotti, D.(2017). Structure and Optical Properties of Carbon Nanoparticles Generated by Laser Treatment of Graphite in Liquids . ChemPhysChem. 18. (9). p. 1074-1083.
Spinning yarn from long carbon nanotube arrays @article{65ff3d0dd40d47ed885be19bbbdfedd9, title = "Spinning yarn from long carbon nanotube arrays", abstract = "Spinning carbon nanotube (CNT) thread directly from 4-6 mm long aligned carbon nanotube arrays is reported here. The strength of carbon nanotube thread was improved by optimizing the chemical vapor deposition parameters for growing long aligned carbon nanotube arrays. The morphological and structural characterization of CNT arrays and threads were studied by Raman spectroscopy, transmission electron microscopy, and scanning electron microscopy. After optimization of growth parameters threads were spun with diameters between 10 and 70 μm. We have achieved thread strength of about 280 MPa.", keywords = "Chemical Vapor Deposition (CVD) (deposition), Nanostructure", author = "Chaminda Jayasinghe and Supriya Chakrabarti and Schulz, \{Mark J.\} and Vesselin Shanov", year = "2011", month = mar, day = "14", doi = "10.1557/jmr.2010.91", language = "English", volume = "26", pages = "645--651", journal = "Journal of Materials Research", issn = "0884-2914", publisher = "Springer", number = "5", } . Journal of Materials Research.
Supriya Chakrabarti, Chaminda Jayasinghe, Mark J. Schulz, Vesselin Shanov(2011). Spinning yarn from long carbon nanotube arrays . Journal of Materials Research. 26. (05). p. 645--651. Cambridge University Press ({CUP})
Jayasinghe, C., Chakrabarti, S., Schulz, M.J., Shanov, V.(2011). Spinning yarn from long carbon nanotube arrays . Journal of Materials Research. 26. (5). p. 645-651.
The effect of substrate positions in chemical vapor deposition reactor on the growth of carbon nanotube arrays @article{5f6b193028fb41e0bcd2ae11d158979f, title = "The effect of substrate positions in chemical vapor deposition reactor on the growth of carbon nanotube arrays", abstract = "The effect of substrate positions inside the chemical vapor deposition reactor on the length and quality of the grown carbon nanotube (CNT) arrays is reported. It was found that longer CNT arrays are grown when located downstream on the platform in the reactor. This effect becomes more pronounced for increased growth time. Related factors such as temperature of the gas mixture and its flow velocity seem to be responsible for the behavior. The quality of the CNTs is not affected by the position of the substrates inside the reactor.", author = "Ge Li and Supriya Chakrabarti and Mark Schulz and Vesselin Shanov", year = "2010", month = jun, day = "1", doi = "10.1016/j.carbon.2010.01.054", language = "English", volume = "48", pages = "2111--2115", journal = "Carbon", issn = "0008-6223", publisher = "Elsevier Ltd", number = "7", } . Carbon.
Supriya Chakrabarti, Ge Li, Mark Schulz, Vesselin Shanov(2010). The effect of substrate positions in chemical vapor deposition reactor on the growth of carbon nanotube arrays . Carbon. 48. (7). p. 2111--2115. Elsevier {BV}
Nanotube responsive materials @article{fe3e06f2b3d44ab591e4f1c9d21794cb, title = "Nanotube responsive materials", abstract = "Individual nanotubes made of carbon, boron nitride, iron, silicon, or other materials have properties such as high strength, toughness, electrical and thermal conductivity, and light weight that cannot be matched by conventional materials. Nanotubes also change their properties in response to external fields and change one type of energy into another, which are useful for design. This article explores three main steps in exploiting responsive materials based on nanotubes: nanotube synthesis, macroscale material fabrication, and incorporation into device structures for novel applications. Nanotubes are always synthesized as individual particles in the form of powders, smoke particles, or aligned forests. To be industrially important, nanotubes generally must be processed to form derivative materials such as functionalized/coated powders and forests and macroscale intermediate materials such as sheets, ribbon, and yarn. The processed nanotubes are then used to develop responsive materials and devices that are able to resist, react to, or generate energy from their environment. This article provides background information and ideas on how to develop nanotube responsive materials for everyday use.", author = "Chaminda Jayasinghe and Weifeng Li and Yi Song and Abot, \{Jandro L.\} and Shanov, \{Vesselin N.\} and Svitlana Fialkova and Sergey Yarmolenko and Surya Sundaramurthy and Ying Chen and Wondong Cho and Supriya Chakrabarti and Ge Li and Yeoheung Yun and Schulz, \{Mark J.\}", year = "2010", month = jan, day = "1", doi = "10.1557/mrs2010.680", language = "English", volume = "35", pages = "682--692", journal = "MRS Bulletin", issn = "0883-7694", publisher = "Cambridge University Press", number = "9", } . MRS Bulletin.
Li, G., Chakrabarti, S., Schulz, M., Shanov, V.(2010). The effect of substrate positions in chemical vapor deposition reactor on the growth of carbon nanotube arrays . Carbon. 48. (7). p. 2111-2115.
Jayasinghe, C., Li, W., Song, Y., Abot, J.L., Shanov, V.N., Fialkova, S., Yarmolenko, S., Sundaramurthy, S., Chen, Y., Cho, W., et al.(2010). Nanotube responsive materials . MRS Bulletin. 35. (9). p. 682-692.
Growth of aligned multiwalled carbon nanotubes copper substrates by chemical vapor deposition @article{6d1ed51c1d5344c0aa88e0393f8016a8, title = "Growth of aligned multiwalled carbon nanotubes copper substrates by chemical vapor deposition", abstract = "Successful growth of vertically aligned carbon nanotube (CNT) arrays on copper substrate by thermal chemical vapor deposition is reported in this paper. The effects of Ti, Ni, and Ni-Cr intermediate layers have been studied to eliminate cracking of the copper surface during the synthesis of CNTs. It was found that these intermediate layers play a critical role in achieving vertical alignment of CNTs on copper substrates. The effects of other reaction parameters such as flow rate of ethylene, concentration of water vapor, and deposition temperature have also been studied. Scanning electron microscopy, transmission electron microscopy, and micro-Raman spectroscopy were used to evaluate the quality and nature of the CNT formed.", author = "Ge Li and Supriya Chakrabarti and Mark Schulz and Vesselin Shanov", year = "2009", month = sep, day = "1", doi = "10.1557/jmr.2009.0339", language = "English", volume = "24", pages = "2813--2820", journal = "Journal of Materials Research", issn = "0884-2914", publisher = "Springer", number = "9", } . Journal of Materials Research.
Supriya Chakrabarti, Ge Li, Mark Schulz, Vesselin Shanov(2009). Growth of aligned multiwalled carbon nanotubes on bulk copper substrates by chemical vapor deposition . Journal of Materials Research. 24. (09). p. 2813--2820. Cambridge University Press ({CUP})
Li, G., Chakrabarti, S., Schulz, M., Shanov, V.(2009). Growth of aligned multiwalled carbon nanotubes copper substrates by chemical vapor deposition . Journal of Materials Research. 24. (9). p. 2813-2820.
Vertically aligned double-walled carbon nanotube electrode prepared by transfer methodology for electric double layer capacitor @article{f8b291b9471e4b218ed8431b045580bf, title = "Vertically aligned double-walled carbon nanotube electrode prepared by transfer methodology for electric double layer capacitor", abstract = "We successfully prepared a vertically aligned double-walled carbon nanotube (DWCNT) sheet by a transfer procedure from a silicon substrate as a DWCNT seedbed that was covered with catalyst grains to an aluminum sheet as a current collector for application to a high-performance electrode for an electric double layer capacitor (EDLC). The charge-discharge characteristics and EDLC performances of the aligned DWCNT electrode were evaluated and compared with those of a vertically aligned multi-walled CNT (MWCNT) electrode. The gravimetric capacitance of the DWCNT electrode was ca. four times larger than that of the MWCNT electrode. The rate capability of the DWCNT electrode was found to be excellent. This is mainly ascribed to our transfer technique.", keywords = "Double-walled carbon nanotube, Electric double layer capacitor, Rate capability, Transfer, Vertically aligned DWCNT", author = "Yuichi Honda and Masayuki Takeshige and Hideki Shiozaki and Takaharu Kitamura and Kenji Yoshikawa and Supriya Chakrabarti and Osamu Suekane and Lujun Pan and Yoshikazu Nakayama and Masaki Yamagata and Masashi Ishikawa", year = "2008", month = dec, day = "1", doi = "10.1016/j.jpowsour.2008.09.020", language = "English", volume = "185", pages = "1580--1584", journal = "Journal of Power Sources", issn = "0378-7753", publisher = "Elsevier BV", number = "2", } . Journal of Power Sources.
Electrochemistry at carbon nanotube electrodes @article{c7b05dc87e9d49ceaf712ea8595d9b88, title = "Electrochemistry at carbon nanotube electrodes: Is the nanotube tip more active than the sidewall?", abstract = "(Figure Presented) More than tips: The electrochemical properties of the tips and sidewalls of carbon nanotubes can be compared when specific regions are selectively masked with a nonconducting polymer coating (e.g. polystyrene) such that the electrolyte has access to one region only (see scheme). Surprisingly electrochemistry at carbon nanotube electrodes is not always facilitated by the nanotube tip.", keywords = "Carbon nanotubes, Electrochemistry, Nanotube electrodes, Surface chemistry", author = "Kuanping Gong and Supriya Chakrabarti and Liming Dai", year = "2008", month = jul, day = "7", doi = "10.1002/anie.200801744", language = "English", volume = "47", pages = "5446--5450", journal = "Angewandte Chemie - International Edition", issn = "1433-7851", publisher = "John Wiley and Sons Ltd", number = "29", } . Angewandte Chemie - International Edition.
ZnS nanowire arrays @article{7c8b7dc7eb8d47e587f484ea3b352b6e, title = "ZnS nanowire arrays: Synthesis, optical and field emission properties", abstract = "Nanowire arrays of cubic zinc sulfide are synthesized on zinc foil by a simple thermal evaporation route at relatively low temperature (<500 °C). A self-catalytic liquid-solid growth is proposed for the formation of the nanowires. Influence of the synthesis temperatures on the morphological features of the ZnS nanowires is studied. Growth sequence of the nanowires with synthesis time is also studied through scanning electron microscopy. These nanowires grow along the [111] direction and remain perpendicular to the surface of the Zn substrate. Room temperature photoluminescence measurement exhibit UV and blue emission peaks at around 350 and 397 nm, respectively. These ZnS nanowires exhibited good field emission properties similar to those of conventional field emitters.", author = "Subhajit Biswas and Tandra Ghoshal and Soumitra Kar and Supriya Chakrabarti and Subhadra Chaudhuri", year = "2008", month = jul, day = "1", doi = "10.1021/cg800071g", language = "English", volume = "8", pages = "2171--2176", journal = "Crystal Growth and Design", issn = "1528-7483", publisher = "American Chemical Society", number = "7", } . Crystal Growth and Design.
Structural evaluation along the nanotube length for super-long vertically aligned double-walled carbon nanotube arrays @article{4e23ffe1810d402598de023c340897ef, title = "Structural evaluation along the nanotube length for super-long vertically aligned double-walled carbon nanotube arrays", abstract = "By performing Raman spectroscopic and electrochemical measurements along the nanotube length, we have demonstrated that there is a concentration gradient of structural defects along the tube length for super-long (ca. 5 mm) vertically aligned double-walled carbon nanotubes (SLVA-DWNTs) produced by water-assisted CVD growth. An increase in the structural defect content along the nanotube length from the top to bottom end was observed in the present study due to the {"}bottom growth{"} process and the decay of the catalyst reactivity with the growth time. The newly observed defect content gradient facilitated us to tune the nanotube electrochemistry along its length and to deposit metal particles in a length-specific fashion.", author = "Supriya Chakrabarti and Kuanping Gong and Liming Dai", year = "2008", month = jun, day = "5", doi = "10.1021/jp802059t", language = "English", volume = "112", pages = "8136--8139", journal = "Journal Of Physical Chemistry C", issn = "1932-7447", publisher = "American Chemical Society", number = "22", } . Journal Of Physical Chemistry C.
Direct synthesis of ZnO nanowire arrays on Zn foil by a simple thermal evaporation process @article{d6b8714706d44c7585e023d3ad431b86, title = "Direct synthesis of ZnO nanowire arrays on Zn foil by a simple thermal evaporation process", abstract = "ZnO nanowire arrays were synthesized on zinc foil by a simple thermal evaporation process at relatively low temperature. Morphology and size controlled synthesis of the ZnO nanostructures was achieved by variation of the synthesis temperature, reaction time and the surface roughness of the substrate. A gas-solid and self-catalytic liquid-solid mechanism is proposed for the growth of nanowires at different temperatures. High-resolution transmission electron microscopy (HRTEM) showed that the as-grown nanowires were of single crystal hexagonal wurtzite structure, growing along the [101] direction. Photoluminescence exhibited strong UV emission at ∼382 nm and a broad green emission at ∼513 nm with 325 nm excitation. Raman spectroscopy revealed a phonon confinement effect when compared with results from bulk ZnO. The nanowire arrays also exhibited a field emission property.", author = "Tandra Ghoshal and Subhajit Biswas and Soumitra Kar and Apurba Dev and Supriya Chakrabarti and Subhadra Chaudhuri", year = "2008", month = feb, day = "13", doi = "10.1088/0957-4484/19/6/065606", language = "English", volume = "19", journal = "Nanotechnology", issn = "0957-4484", publisher = "Institute of Physics", number = "6", } . Nanotechnology.
Supriya Chakrabarti, Tandra Ghoshal, Subhajit Biswas, Soumitra Kar, Apurba Dev, Subhadra Chaudhuri(2008). Direct synthesis of ZnO nanowire arrays on Zn foil by a simple thermal evaporation process . Nanotechnology. 19. (6). p. 065606. {IOP} Publishing
Ghoshal, T., Biswas, S., Kar, S., Dev, A., Chakrabarti, S., Chaudhuri, S.(2008). Direct synthesis of ZnO nanowire arrays on Zn foil by a simple thermal evaporation process . Nanotechnology. 19. (6).
Honda, Y., Takeshige, M., Shiozaki, H., Kitamura, T., Yoshikawa, K., Chakrabarti, S., Suekane, O., Pan, L., Nakayama, Y., Yamagata, M., et al.(2008). Vertically aligned double-walled carbon nanotube electrode prepared by transfer methodology for electric double layer capacitor . Journal of Power Sources. 185. (2). p. 1580-1584.
Gong, K., Chakrabarti, S., Dai, L.(2008). Electrochemistry at carbon nanotube electrodes: Is the nanotube tip more active than the sidewall? . Angewandte Chemie - International Edition. 47. (29). p. 5446-5450.
Biswas, S., Ghoshal, T., Kar, S., Chakrabarti, S., Chaudhuri, S.(2008). ZnS nanowire arrays: Synthesis, optical and field emission properties . Crystal Growth and Design. 8. (7). p. 2171-2176.
Chakrabarti, S., Gong, K., Dai, L.(2008). Structural evaluation along the nanotube length for super-long vertically aligned double-walled carbon nanotube arrays . Journal of Physical Chemistry C. 112. (22). p. 8136-8139.
Effect of MgO coating on field emission of a stand-alone carbon nanotube @article{e6c45ab0520348beabf157865dcd551e, title = "Effect of MgO coating on field emission of a stand-alone carbon nanotube", abstract = "Field emission properties of a stand-alone MgO-coated carbon nanotube (CNT) have been investigated by a field emission microscopy. A finite element method is used to analyze the electric field distribution on the surface of a CNT and in the layer of MgO. It is found that the dielectric MgO layer decreases the strength of electric field on the CNT surface and then increases the tunnel barrier of field emission. However, it is observed that the MgO coating largely decreases the fluctuation of the emission current from a CNT especially in the current of over 10-7 A.", author = "Lujun Pan and Yasumoto Konishi and Hiroyuki Tanaka and Supriya Chakrabarti and Shogo Hokushin and Seiji Akita and Yoshikazu Nakayama", year = "2007", month = sep, day = "28", doi = "10.1116/1.2770740", language = "English", volume = "25", pages = "1581--1583", journal = "Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures", issn = "1071-1023", publisher = "AVS Science and Technology Society", number = "5", } . Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures.
Stable field emission property of patterned MgO coated carbon nanotube arrays @article{16472e9a85f1457096713476f49f67fb, title = "Stable field emission property of patterned MgO coated carbon nanotube arrays", abstract = "Aligned carbon nanotubes (CNTs) in a specific pattern were synthesized by catalytic thermal chemical vapor deposition (CVD) technique. The carbon nanotubes were then coated with MgO layer of different thicknesses to improve the field emission property. Field emission with high stability and low turn-on voltage of about 116 V was observed for the aligned nanotubes coated with a MgO layer of thickness 10 nm compared to that of uncoated CNTs. The current fluctuation for 8 h was found to be as low as 9\% for MgO (10 nm) coated nanotubes. The field emission image indicated a very uniform emission from the whole area of the deposited CNTs on the substrate for the 10-nm-MgO-coated CNTs.", keywords = "Field emission, High stability, Low turn-on voltage, MgO coating, Patterned aligned carbon nanotubes", author = "Supriya Chakrabarti and Lujun Pan and Hiroyoshi Tanaka and Shogo Hokushin and Yoshikazu Nakayama", year = "2007", month = jul, day = "4", doi = "10.1143/JJAP.46.4364", language = "English", volume = "46", pages = "4364--4369", journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers", issn = "0021-4922", publisher = "Institute of Physics", number = "7 A", } . Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers.
Supriya Chakrabarti, Lujun Pan, Hiroyoshi Tanaka, Shogo Hokushin, Yoshikazu Nakayama(2007). Stable Field Emission Property of Patterned MgO Coated Carbon Nanotube Arrays . Japanese Journal of Applied Physics. 46. (7A). p. 4364--4369. Japan Society of Applied Physics
Fabrication of GaN nanowires and nanoribbons by a catalyst assisted vapor-liquid-solid process @article{f6aa1296ecc0431f82e28b9328fb6273, title = "Fabrication of GaN nanowires and nanoribbons by a catalyst assisted vapor-liquid-solid process", abstract = "Wurtzite GaN nanowires and nanoribbons were produced directly from Ga metal by an Au catalyst assisted thermal evaporation process in a flowing ammonia atmosphere. We have investigated the effect of different experimental parameters on the morphology of the nanoforms. The diameters of the nanowires were varied between 20 and 40 nm while the widths of the nanoribbons were within 100-250 nm. Microstructural studies by TEM reveals the role of vapor-liquid-solid process in the nucleation of GaN nanoforms. The evolution of the ribbon like morphology was attributed to the vapor-solid process. Photoluminescence study showed UV-blue emission from the GaN nanostructures. Field emission studies indicated the possibility of these materials to be used as the cathode materials in field emission based devices.", keywords = "A. Nanostructures, A. Nitrides, B. Crystal growth, C. Electron microscopy, D. Luminescence", author = "Subhajit Biswas and Soumitra Kar and Tandra Ghoshal and Ashok, \{Vishal D.\} and Supriya Chakrabarti and Subhadra Chaudhuri", year = "2007", month = mar, day = "22", doi = "10.1016/j.materresbull.2006.07.004", language = "English", volume = "42", pages = "428--436", journal = "Materials Research Bulletin", issn = "0025-5408", publisher = "Elsevier Ltd", number = "3", } . Materials Research Bulletin.
Supriya Chakrabarti, Subhajit Biswas, Soumitra Kar, Tandra Ghoshal, Vishal D. Ashok, Subhadra Chaudhuri(2007). Fabrication of GaN nanowires and nanoribbons by a catalyst assisted vapor–liquid–solid process . Materials Research Bulletin. 42. (3). p. 428--436. Elsevier {BV}
Number of walls controlled synthesis of millimeter-long vertically aligned brushlike carbon nanotubes @article{48f2096c82b44248b30dbc0895468215, title = "Number of walls controlled synthesis of millimeter-long vertically aligned brushlike carbon nanotubes", abstract = "Millimeter (mm) long vertically aligned carbon nanotubes (CNTs) were grown by the catalyst assisted thermal chemical vapor deposition (CVD) technique. The continuous growth of CNTs as long as 7 mm was observed after 12 h of deposition by adjusting the growth parameters for making the catalyst active for a long time. The direct dependence of the number of walls of mm-long CNTs on the Fe catalyst thickness was observed. The successful syntheses of single-walled nanotubes (SWNTs), double-walled nanotubes (DWNTs), and multiwalled nanotubes (MWNTs) with high percentages (∼80\%) were achieved by varying the catalyst layer thickness. The effect of Al2O3 buffer layer was found to be critical for this controlled synthesis, which has been discussed in detail. The possible growth mechanism is also discussed to better understand this phenomenon.", author = "Supriya Chakrabarti and Hideki Kume and Lujun Pan and Takeshi Nagasaka and Yoshikazu Nakayama", year = "2007", month = feb, day = "8", doi = "10.1021/jp0666986", language = "English", volume = "111", pages = "1929--1934", journal = "Journal Of Physical Chemistry C", issn = "1932-7447", publisher = "American Chemical Society", number = "5", } . Journal Of Physical Chemistry C.
Chakrabarti, S., Pan, L., Tanaka, H., Hokushin, S., Nakayama, Y., Chakrabarti, S., Pan, L., Tanaka, H., Hokushin, S., Nakayama, Y.(2007). Stable field emission property of patterned MgO coated carbon nanotube arrays . Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers. 46. (7 A). p. 4364-4369.
Biswas, S., Kar, S., Ghoshal, T., Ashok, V.D., Chakrabarti, S., Chaudhuri, S., Biswas, S., Kar, S., Ghoshal, T., Ashok, V.D., et al.(2007). Fabrication of GaN nanowires and nanoribbons by a catalyst assisted vapor-liquid-solid process . Materials Research Bulletin. 42. (3). p. 428-436.
Chakrabarti, S., Kume, H., Pan, L., Nagasaka, T., Nakayama, Y., Chakrabarti, S., Kume, H., Pan, L., Nagasaka, T., Nakayama, Y.(2007). Number of walls controlled synthesis of millimeter-long vertically aligned brushlike carbon nanotubes . Journal of Physical Chemistry C. 111. (5). p. 1929-1934.
Pan, L., Konishi, Y., Tanaka, H., Chakrabarti, S., Hokushin, S., Akita, S., Nakayama, Y.(2007). Effect of MgO coating on field emission of a stand-alone carbon nanotube . Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures. 25. (5). p. 1581-1583.
Surfactant-assisted route to synthesize well-aligned ZnO nanorod arrays on sol-gel-derived ZnO thin films @article{c4d819ef2530466098be92bc8af163f0, title = "Surfactant-assisted route to synthesize well-aligned ZnO nanorod arrays on sol-gel-derived ZnO thin films", abstract = "Anisotropic growth of ZnO nanorod arrays on ZnO thin films was achieved at a temperature of 90° C by a surfactant-assisted soft chemical approach with control over size and orientation. ZnO thin films with c-axis preferred orientation had been achieved by the sol-gel technique. Lengths, diameters, and the degree of alignment of the ZnO nanorods were controlled by changing the experimental parameters. It was observed that the surfactant was essential to restrict the lateral growth of the nanorods, whereas the pH level of the reaction medium controlled the length of the nanorods. On the other hand, the orientation of the nanorods depended on the crystalline orientation of the film as well as the pH of the reaction medium. Room-temperature photoluminescence studies revealed that the ZnO nanorods with the best alignment exhibited the best emission property. The ZnO nanorods exhibited a strong UV emission peak at ∼3.22 eV, ascribed to the band-edge emission. The field emission studies of the well-aligned nanorod arrays exhibited a low turn-on field of 1.7 V/μm to get an emission current density of 0.1 μA/cm2.", author = "Apurba Dev and Panda, \{Subhendu K.\} and Soumitra Kar and Supriya Chakrabarti and Subhadra Chaudhuri", year = "2006", month = jul, day = "27", doi = "10.1021/jp062729l", language = "English", volume = "110", pages = "14266--14272", journal = "Journal of Physical Chemistry A", issn = "1089-5639", publisher = "American Chemical Society", number = "29", } . Journal of Physical Chemistry A.
Growth of super long aligned brush-like carbon nanotubes @article{3585cdd3e7a1487bbd3742549439a221, title = "Growth of super long aligned brush-like carbon nanotubes", abstract = "Efficient chemical vapor deposition (CVD) synthesis of super long (7mm) aligned carbon nanotubes (CNTs) with high-density is reported here. Activity of catalyst nanoparticles has been achieved for very long time periods (ca. 12h) by optimization of experimental parameters. The relative levels of ethylene and water, as well as those of ethylene and H2, were found to be most important for achieving extended-time activity of the catalyst. Transmission electron microscope (TEM) images revealed that the nanotubes were mainly double-walled, but very few single-walled and multi-walled nanotubes were also present in the sample.", keywords = "Carbon nanotube, Double-walled nanotubes, Super long, Thermal chemical vapor deposition, Vertically aligned", author = "Supriya Chakrabarti and Takeshi Nagasaka and Yuya Yoshikawa and Lujun Pan and Yoshikazu Nakayama", year = "2006", month = jul, day = "14", doi = "10.1143/JJAP.45.L720", language = "English", volume = "45", journal = "Japanese Journal of Applied Physics, Part 2: Letters", issn = "0021-4922", publisher = "Institute of Physics", number = "24-28", } . Japanese Journal of Applied Physics, Part 2: Letters.
Supriya Chakrabarti, Takeshi Nagasaka, Yuya Yoshikawa, Lujun Pan, Yoshikazu Nakayama(2006). Growth of Super Long Aligned Brush-Like Carbon Nanotubes . Japanese Journal of Applied Physics. 45. (No. 28). p. L720--L722. Japan Society of Applied Physics
Morphology dependent field emission from In2O3 nanostructures @article{f3ce50fb60c849998843a2d76a398a4c, title = "Morphology dependent field emission from In2O3 nanostructures", abstract = "In2O3 nanostructures such as aligned nanocolumn arrays, nanowires and nanopyramids were fabricated using a simple physical evaporation technique. Nanocolumn arrays and the nanowires were produced using an Au catalysed vapour-liquid-solid (VLS) technique and the nanopyramid structures were prepared using a non-catalytic approach. Field-emission studies revealed that the morphologies of these In2O3 nanoforms have considerable effects on the field-emission properties. Among these nanoforms, nanocolumn arrays have the lowest turn-on voltage and the highest field enhancement factor. The results indicated that the In2O 3 nanoforms could be used as cathode materials for the fabrication of devices based on field-emission properties.", author = "Soumitra Kar and Supriya Chakrabarti and Subhadra Chaudhuri", year = "2006", month = jun, day = "28", doi = "10.1088/0957-4484/17/12/041", language = "English", volume = "17", pages = "3058--3062", journal = "Nanotechnology", issn = "0957-4484", publisher = "Institute of Physics", number = "12", } . Nanotechnology.
Supriya Chakrabarti, Soumitra Kar, Subhadra Chaudhuri(2006). Morphology dependent field emission from In 2 O 3 nanostructures . Nanotechnology. 17. (12). p. 3058--3062. {IOP} Publishing
Optical and field emission properties of ZnO nanorod arrays synthesized on zinc foils by the solvothermal route @article{ef50f8c8103c4a04996f08431afb77e2, title = "Optical and field emission properties of ZnO nanorod arrays synthesized on zinc foils by the solvothermal route", abstract = "The solvothermal process was employed to grow ZnO nanorods at low temperature on conducting substrate, which is extremely important for making efficient electrical contacts in various applications based on ZnO nanorods. Efforts were made to find the ideal growth parameters for better alignment of the ZnO nanorods with a view to tailor their luminescent properties. The ZnO nanorod arrays were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive analysis of x-rays (EDAX) and x-ray diffraction study. The ZnO nanorod arrays were found to have excellent UV emission properties at room temperature. Aligned ZnO nanorod arrays exhibit good field emission properties, revealing their applicability as cathode materials for field emission based devices.", author = "Apurba Dev and Soumitra Kar and Supriya Chakrabarti and Subhadra Chaudhuri", year = "2006", month = mar, day = "14", doi = "10.1088/0957-4484/17/5/061", language = "English", volume = "17", pages = "1533--1540", journal = "Nanotechnology", issn = "0957-4484", publisher = "Institute of Physics", number = "5", } . Nanotechnology.
Supriya Chakrabarti, Apurba Dev, Soumitra Kar, Subhadra Chaudhuri(2006). Optical and field emission properties of ZnO nanorod arrays synthesized on zinc foils by the solvothermal route . Nanotechnology. 17. (5). p. 1533--1540. {IOP} Publishing
Dev, A., Kar, S., Chakrabarti, S., Chaudhuri, S., Dev, A., Kar, S., Chakrabarti, S., Chaudhuri, S.(2006). Optical and field emission properties of ZnO nanorod arrays synthesized on zinc foils by the solvothermal route . Nanotechnology. 17. (5). p. 1533-1540.
Kar, S., Chakrabarti, S., Chaudhuri, S., Kar, S., Chakrabarti, S., Chaudhuri, S.(2006). Morphology dependent field emission from In<inf>2</inf>O<inf>3</inf> nanostructures . Nanotechnology. 17. (12). p. 3058-3062.
Chakrabarti, S., Nagasaka, T., Yoshikawa, Y., Pan, L., Nakayama, Y., Chakrabarti, S., Nagasaka, T., Yoshikawa, Y., Pan, L., Nakayama, Y.(2006). Growth of super long aligned brush-like carbon nanotubes . Japanese Journal of Applied Physics, Part 2: Letters. 45. (24-28).
Dev, A., Panda, S.K., Kar, S., Chakrabarti, S., Chaudhuri, S., Dev, A., Panda, S.K., Kar, S., Chakrabarti, S., Chaudhuri, S.(2006). Surfactant-assisted route to synthesize well-aligned ZnO nanorod arrays on sol-gel-derived ZnO thin films . Journal of Physical Chemistry B. 110. (29). p. 14266-14272.
Photoluminescence and Raman study of CdS-Al 2O 3 nanocomposite films prepared by sol-gel techniques @article{839694ea27354d9d96e20ee9e6798665, title = "Photoluminescence and Raman study of CdS-Al 2O 3 nanocomposite films prepared by sol-gel techniques", abstract = "The optical and microstructural properties of CdS-Al 2O 3 nanocomposite (CdS-Al 2O 3 = 20:80 to 50:50) thin films synthesized by sol-gel techniques were studied. Optical transmission spectra indicated a marked blue shift of the absorption edge due to quantum confinement. Band gaps of CdS-Al 2O 3 nanocomposites were found to vary in the range 3.69-2.61 eV. The sizes of the nanocrystals, estimated from the blue shift (0.2-1.2 eV) of the absorption edges and transmission electron microscopy, were found to vary in the range 2.8-7.0 nm. X-ray diffraction studies showed reflections from (111), (200), (220), and (311) planes of CdS in the cubic phase. Microstructural characterization by high-resolution transmission electron microscope (HRTEM) indicated well crystallinity of the nanoparticles and lattice fringes supported the cubic phase of CdS. Raman spectroscopy was carried out for CdS-Al 2O 3 nanocomposites, which indicated a prominent peak at ∼299 cm -1. Significant changes in the peak position and intensity of the Raman peak were observed with varying the annealing temperature (373-573 K). Photoluminescence measurements indicated a prominent broad peak at ∼1.81 eV due to the surface defects in the CdS nanocrystallites. The present study revealed Al 2O 3 to be a good capping material for CdS nanoparticles.", keywords = "CdS-Al O nanocomposite, Quantum confinement effect photoluminescence, Raman study, Sol-gel", author = "Panda, \{S. K.\} and S. Chakrabarti and A. Ganguly and S. Chaudhuri", year = "2005", month = dec, day = "1", doi = "10.1166/jnn.2005.068", language = "English", volume = "5", pages = "459--465", journal = "Journal of Nanoscience and Nanotechnology", issn = "1533-4880", publisher = "American Scientific Publishers", number = "3", } . Journal of Nanoscience and Nanotechnology.
Optical transmission and photoluminescence studies of ZnO-MgO nanocomposite thin films @article{2e084780253d4a7388297ed44c7b753e, title = "Optical transmission and photoluminescence studies of ZnO-MgO nanocomposite thin films", abstract = "ZnO nanoparticles were embedded in the MgO matrix by the sol-gel technique and were subsequently annealed in the temperature range of 573-873 K in air. The particle radii were around 2.0-3.0 nm at 573 K. The optical transmission spectra of the films recorded at room temperature indicated a blue shift (0.38-1.26 eV) depending on the annealing temperatures and the sizes of the embedded particles. The spectra showed a broadening effect (Urbach tail), indicating structural and temperature related disorders in the nanocrystals. The Urbach tail width decreased with increase in annealing temperatures depicting higher crystalline order. The room temperature photoluminescence spectra showed excitonic emissions of ZnO nanoparticles within 4.50-4.03 eV. The excitonic peak was red shifted with higher annealing temperature due to an increase in the particle size. Broad defect level related peaks were found around 2.19 and 2.03 eV.", author = "Soumen Das and Supriya Chakrabarti and Subhadra Chaudhuri", year = "2005", month = nov, day = "21", doi = "10.1088/0022-3727/38/22/004", language = "English", volume = "38", pages = "4021--4026", journal = "Journal of Physics D: Applied Physics", issn = "0022-3727", publisher = "Institute of Physics", number = "22", } . Journal of Physics D: Applied Physics.
Optical properties of Mg0.05Zn0.95O/SiO2 nanocomposite films prepared by sol-gel technique @article{875e0d6cf1b747d49890cafb3f4ea9cf, title = "Optical properties of Mg0.05Zn0.95O/SiO2 nanocomposite films prepared by sol-gel technique", abstract = "Mg0.05Zn0.95O/SiO2 nanocomposite films in the molar ratio 25:75 consisting of Mg0.05Zn0.95O nanoparticles embedded in a dielectric matrix were prepared by sol-gel technique (spin coating). Optical transmittance, Raman effect and photoluminescence measurements of the composites indicated effective capping of the Mg 0.05Zn0.95O nanoparticles (radii 1. 61-1.68 nm) in the host showing practically no variation of particle size with the post deposition annealing treatments. The blue shift of the band gap (4.29-4.23 eV) from that of bulk Mg0.05Zn0.95O indicated strong carrier confinement for samples annealed at T ≤ 873 K. Highly intense UV emission ( ∼4.14 eV) compared to that of defect related emission (2.59 eV) at room temperature was obtained by incorporating 5\% Mg in ZnO.", keywords = "Mg Zn O, Nanocomposite, Optical property, Sol-gel, Thin film, UV luminescence", author = "A. Dev and S. Chakrabarti and S. Kar and S. Chaudhuri", year = "2005", month = jun, day = "1", doi = "10.1007/s11051-005-0152-1", language = "English", volume = "7", pages = "195--201", journal = "JOURNAL OF NANOPARTICLE RESEARCH", issn = "1388-0764", publisher = "Springer Science and Business Media B.V.", number = "2-3", } . JOURNAL OF NANOPARTICLE RESEARCH.
Cobalt doped γ-Fe 2 O 3 nanoparticles @article{83335b89f1a4470aaf4288383604f908, title = "Cobalt doped γ-Fe 2 O 3 nanoparticles: Synthesis and magnetic properties", abstract = " We demonstrate here the wet chemical synthesis of cobalt doped γ-Fe 2 O 3 nanoparticles and the subsequent effect on magnetic properties with the variation in dopant concentration. It is observed that cobalt can be homogeneously doped into the γ-Fe 2 O 3 lattice up to 5 mol\% without any appreciable change in the particle size (∼6 nm). Further increase in cobalt concentration (10 mol\% here) resulted in an increase in particle size (∼9 nm) due to possible adsorption of a cobalt layer on the surface of γ-Fe 2 O 3 nanoparticles rather than complete doping in the iron oxide lattice. The ac susceptibility measurements revealed an increase in blocking temperature (T B ) with percentage variation in cobalt doping (2-10\%), indicating substitution of Fe 3+ ions by Co 2+ ions in the γ-Fe 2 O 3 lattice. The dc magnetization measurements showed an increase in saturation magnetization only up to 5\%, beyond which it significantly diminished. The reduction in saturation magnetization is attributed to the contribution from surface anisotropy in cobalt coated γ-Fe 2 O 3 nanoparticles.", author = "S. Chakrabarti and Mandal, \{S. K.\} and S. Chaudhuri", year = "2005", month = apr, day = "1", doi = "10.1088/0957-4484/16/4/029", language = "English", volume = "16", pages = "506--511", journal = "Nanotechnology", issn = "0957-4484", publisher = "Institute of Physics", number = "4", } . Nanotechnology.
Positron annihilation lifetime changes across the structural phase transition in nanocrystalline Fe 2O 3 @article{886dd348d7464830a9a31e1bb5146b44, title = "Positron annihilation lifetime changes across the structural phase transition in nanocrystalline Fe 2O 3", abstract = "Nanocrystalline samples of γ-Fe 2O 3 were prepared through chemical routes and the particles were allowed to grow by thermal treatment at different temperatures. γ-Fe 2O 3 transformed to the a phase at a temperature relatively lower than that reported for coarse-grained samples. Positron lifetimes were measured in both the phases of the samples and a significant reduction was observed across the transformation. This is attributed to the expected reduction in the unit cell volume and the nature of orientation of the nearest-neighboring atoms around the positron trapping sites. Positrons are basically annihilating from the octahedral vacancy sites in γ-Fe 2O 3 and the lifetime decreases as the nearest-neighboring atoms increasingly influence the annihilation probability of the positrons when the sample changes to the a phase. The reduction in the positron lifetime has helped to envisage the onset of the transformation earlier than that indicated by x-ray diffraction. The positron lifetimes in the intergranular region increased due to the increase in free volume associated with the atoms on the grain surfaces when the grain size reduced. Doppler broadening measurements of the annihilation γ-ray spectral line shapes were also carried out and the results supported these findings.", author = "S. Chakrabarti and S. Chaudhuri and Nambissan, \{P. M.G.\}", year = "2005", month = feb, day = "1", doi = "10.1103/PhysRevB.71.064105", language = "English", volume = "71", journal = "Physical Review B - Condensed Matter and Materials Physics", issn = "1098-0121", publisher = "APS Physics", number = "6", } . Physical Review B - Condensed Matter and Materials Physics.
Enhancement of UV luminescence in sol-gel prepared ZnO thin films by incorporation of Mg @article{54fc473ed3c540c1aed9bc1f175134b6, title = "Enhancement of UV luminescence in sol-gel prepared ZnO thin films by incorporation of Mg", abstract = "Well-crystallized Mg xZn 1-xO films were deposited on quartz substrates by sol-gel technique with a variation of x value from 0 to 0.15. The samples were annealed at different temperatures (500°C to 700°C) in air and oxygen atmosphere to study the effect of annealing atmosphere on the luminescence properties of the films. The optical, microstructural and photoluminescence properties of the films were studied. It was found that the band gap of the films increased with increasing Mg concentration (x value). A remarkable change in the photoluminescence spectra of the films for x = 0.05 was observed by varying the annealing atmosphere. Highly intense UV emission at room temperature could be obtained by annealing the Mg 0.05Zn 0.95O film in static oxygen atmosphere, while the intensity of the visible defect related luminescence could be reduced, resulting in a high intensity ratio (∼100) of the two.", author = "S. Chakrabarti and S. Kar and A. Dev and S. Chaudhuri", year = "2005", month = feb, day = "1", doi = "10.1002/pssa.200406925", language = "English", volume = "202", pages = "441--448", journal = "Physica Status Solidi (A) Applications and Materials Science", issn = "1862-6300", publisher = "Wiley-VCH Verlag", number = "3", } . Physica Status Solidi (A) Applications and Materials Science.
Synthesis and characterization of sol-gel derived cu doped zno films @article{e0208d4d77b949d6b2c3540554d3eb4a, title = "Synthesis and characterization of sol-gel derived cu doped zno films", abstract = "Well-crystallized Cu doped (1,3 and 5 mol\%) ZnO films were deposited on quartz substrates by sol-gel technique. The optical, microstructural and photoluminescence properties of the films were studied. It was found that the band gaps (3.38 eV) of the films did not vary up to 5\% Cu doping in ZnO. The preferred orientation along (002) was observed for all the films and the degree of orientation decreased with increasing the molar percentage of Cu in ZnO. Atomic force microscopy (AFM) measurements were performed to study the surface morphology of 1,3 and 5\% Cu doped ZnO thin films; the surface roughness of 1 mol\% Cu doped ZnO film was smaller (∼6 nm) than those of 3 and 5 mol\% Cu doped ZnO films (∼15-20 nm). The photoluminescence spectra of the films showed six peaks at 3.11, 3.03, 2.75, 2.68, 2.65 and 2.27 eV. One peak (3.11 eV) was due to excitonic transition and the other five peaks were due to defect related transitions. The excitonic peak intensity of Cu doped ZnO increased with increasing copper concentration.", keywords = "Cu doping, Microstructure and Photoluminescence, Sol-gel, ZnO", author = "S. Ray and S. Chakrabarti and S. Bhattacharya and S. Chaudhuri", year = "2005", month = jan, day = "1", doi = "10.1080/0371750X.2005.11012202", language = "English", volume = "64", pages = "133--136", journal = "Transactions of the Indian Ceramic Society", issn = "0371-750X", publisher = "Taylor and Francis Ltd.", number = "3", } . Transactions of the Indian Ceramic Society.
Chakrabarti, S., Chaudhuri, S., Nambissan, P.M.G., Chakrabarti, S., Chaudhuri, S., Nambissan, P.M.G.(2005). Positron annihilation lifetime changes across the structural phase transition in nanocrystalline Fe <inf>2</inf>O <inf>3</inf> . Physical Review B - Condensed Matter and Materials Physics. 71. (6).
Ray, S., Chakrabarti, S., Bhattacharya, S., Chaudhuri, S., Ray, S., Chakrabarti, S., Bhattacharya, S., Chaudhuri, S.(2005). Synthesis and characterization of sol-gel derived cu doped zno films . Transactions of the Indian Ceramic Society. 64. (3). p. 133-136.
Chakrabarti, S., Mandal, S.K., Chaudhuri, S., Chakrabarti, S., Mandal, S.K., Chaudhuri, S.(2005). Cobalt doped γ-Fe<inf>2</inf>O<inf>3</inf> nanoparticles: Synthesis and magnetic properties . Nanotechnology. 16. (4). p. 506-511.
Chakrabarti, S., Kar, S., Dev, A., Chaudhuri, S., Chakrabarti, S., Kar, S., Dev, A., Chaudhuri, S.(2005). Enhancement of UV luminescence in sol-gel prepared ZnO thin films by incorporation of Mg . Physica Status Solidi (A) Applications and Materials Science. 202. (3). p. 441-448.
Dev, A., Chakrabarti, S., Kar, S., Chaudhuri, S., Dev, A., Chakrabarti, S., Kar, S., Chaudhuri, S.(2005). Optical properties of Mg<inf>0.05</inf>Zn<inf>0.95</inf>O/SiO<inf>2</inf> nanocomposite films prepared by sol-gel technique . Journal of Nanoparticle Research. 7. (2-3). p. 195-201.
Panda, S.K., Chakrabarti, S., Ganguly, A., Chaudhuri, S., Panda, S.K., Chakrabarti, S., Ganguly, A., Chaudhuri, S.(2005). Photoluminescence and Raman study of CdS-Al <inf>2</inf>O <inf>3</inf> nanocomposite films prepared by sol-gel techniques . Journal of Nanoscience and Nanotechnology. 5. (3). p. 459-465.
Das, S., Chakrabarti, S., Chaudhuri, S., Das, S., Chakrabarti, S., Chaudhuri, S.(2005). Optical transmission and photoluminescence studies of ZnO-MgO nanocomposite thin films . Journal of Physics D: Applied Physics. 38. (22). p. 4021-4026.
Substrate dependence of preferred orientation in sol-gel-derived zinc oxide films @article{181055c5af244d1bab6c0bc21fcc3517, title = "Substrate dependence of preferred orientation in sol-gel-derived zinc oxide films", abstract = "The preferred orientation of ZnO films synthesized by the sol-gel technique was investigated with increasing annealing temperature. Different substrates like soda-lime glass, quartz glass, Corning 7059 glass, polycrystalline Al2O3 and p-type Si(100) were used to examine the substrate effects on the growth of ZnO. The degree of orientation of the (002) plane in the films increased with temperature when the amorphous glass substrates were used. Highly oriented ZnO films along the (002) plane were obtained with soda-lime glass substrate at a particular temperature (550°C). Similar, but not so strong preference was obtained in case of Corning 7059 glass at higher temperatures. In case of the crystalline substrates, no such high degree of orientation was observed. These phenomena are considered in general terms to be closely related with the interfacial energy of the film and the substrate and especially in case of amorphous substrates, to the structure of the glass (presence or absence of non-bridging oxygens).", keywords = "Coatings, Preferred orientation, Sol-gel, Substrate dependence, Zinc oxide", author = "S. Chakrabarti and D. Ganguli and S. Chaudhuri", year = "2004", month = dec, day = "1", doi = "10.1016/j.matlet.2004.09.002", language = "English", volume = "58", pages = "3952--3957", journal = "Materials Letters", issn = "0167-577X", publisher = "Elsevier BV", number = "30", } . Materials Letters.
Microstructural and photoluminescent characterization of one-dimensional ZnO nanostructures prepared by catalyst-assisted vapour-liquid-solid technique @article{98b6360817dd4cf4922486bf79fbc159, title = "Microstructural and photoluminescent characterization of one-dimensional ZnO nanostructures prepared by catalyst-assisted vapour-liquid-solid technique", abstract = "ZnO one-dimensional nanostructures were synthesized in thin-film form on Si substrates by the vapour-liquid-solid technique using Au as catalyst. The morphology of the ZnO nanostructures (from wire/ribbon to rod) was controlled by varying the thicknesses of the Au layers on the Si substrates. The X-ray diffraction studies of the ZnO nanostructures indicated high crystallinity and preferred orientation along the (002) plane of the wurtzite phase. The compositional analysis of ZnO nanostructures by energy-dispersive X-ray analysis revealed their chemical purity. High-resolution transmission electron microscopy indicated dislocation-free structure. The single crystallinity of the ZnO nanostructures was examined by selected-area electron diffraction. The room-temperature photoluminescence spectra of the ZnO nanostructures indicated high intensity of the ultraviolet excitonic emission. Two very week defect-related visible emissions were also observed which revealed almost a defect-free structure and good optical quality of the synthesized material.", keywords = "One-dimensional nanostructures, Photoluminescence, Ultraviolet emission, Vapour-liquid-solid process, ZnO films", author = "S. Chakrabarti and S. Chaudhuri", year = "2004", month = sep, day = "1", doi = "10.1016/j.matchemphys.2004.05.037", language = "English", volume = "87", pages = "196--200", journal = "Materials Chemistry and Physics", issn = "0254-0584", publisher = "Elsevier BV", number = "1", } . Materials Chemistry and Physics.
Optical properties of γ-Fe2O3 nanoparticles dispersed on sol-gel silica spheres @article{3cbf3fc140524ea18ad682ca2623a5e6, title = "Optical properties of γ-Fe2O3 nanoparticles dispersed on sol-gel silica spheres", abstract = "Two types of γ-Fe2O3 nanoparticles, pure γ-Fe2O3 and γ-Fe2O3 dispersed on sol-gel silica spheres (γ-Fe2O3/ SiO2) in thin film form were prepared by the sol-gel technique. Transmission electron microscopy, X-ray diffraction, optical transmittance and FTIR studies along with photoluminescence measurements were carried out for characterizing the samples. The X-ray diffraction patterns of both γ-Fe2O3 nanoparticles and γ-Fe 2O3/SiO2 indicated their phase-pure forms which were supported by the FTIR spectra. The average sizes of the nanoparticles obtained from transmission electron microscopy studies were ∼4 nm for both types of samples. Optical transmittance studies indicated direct allowed transitions with two band gaps at ∼2.43 and 3.07 eV. Although both types of samples showed excitonic luminescence at ∼2.38 eV (at room temperature), the luminescence intensity of the γ-Fe2O3/SiO 2 was higher than that of pure γ-Fe2O3.", keywords = "γ-FeO, Coatings, Nanoparticles, Optical band gap, Photoluminescence, Sol-gel", author = "S. Chakrabarti and D. Ganguli and S. Chaudhuri", year = "2004", month = sep, day = "1", doi = "10.1016/j.physe.2004.06.036", language = "English", volume = "24", pages = "333--342", journal = "Physica E: Low-dimensional Systems and Nanostructures", issn = "1386-9477", publisher = "Elsevier BV", number = "3-4", } . Physica E: Low-dimensional Systems and Nanostructures.
Excitonic and defect related transitions in ZnO-SiO2 nanocomposites synthesized by sol-gel technique @article{04ad86e459c64c97b6c921bc31f5128a, title = "Excitonic and defect related transitions in ZnO-SiO2 nanocomposites synthesized by sol-gel technique", abstract = "ZnO-SiO2 nanocomposite films with ZnO nanoparticles dispersed in a silica matrix (molar ratio of ZnO:SiO2 is 25:75) were deposited on quartz glass substrates by the sol-gel method. The optical, microstructural and photoluminescence properties of the films were studied. The films were annealed in air at different temperatures (373-773 K) to investigate the variation of grain size with annealing temperature. The photoluminescence (PL) spectra of the annealed films showed an excitonic emission in the range of 4.22 to 3.85 eV and two defect related emissions in the range of 2.736 to 2.514 eV and 2.45 to 2.32 eV. A linear shift of the peak positions with increasing particle radii (1.48 to 1.95 nm) of the ZnO nanoparticles was observed. The nature of transition of the defect related visible emissions has been discussed. The variation of defect content in the nanocomposites with the radii of the ZnO nanoparticles were examined from the Urbach tail width.", author = "S. Chakrabarti and D. Ganguli and S. Chaudhuri", year = "2004", month = jul, day = "1", doi = "10.1002/pssa.200306824", language = "English", volume = "201", pages = "2134--2142", journal = "Physica Status Solidi (A) Applied Research", issn = "0031-8965", publisher = "Wiley-VCH Verlag", number = "9", } . Physica Status Solidi (A) Applied Research.
Synthesis of β-Ga2O3 nanowire from elemental Ga metal and its photoluminescence study @article{295a26f6085e41108341af6833016c02, title = "Synthesis of β-Ga2O3 nanowire from elemental Ga metal and its photoluminescence study", abstract = "Gallium oxide (Ga2O3) one-dimensional (ID) nanostructure was fabricated through a simple physical evaporation of elemental gallium in argon atmosphere using gold-sputtered silicon as the substrate. The shape of the ID structure was controlled by the thickness of the sputtered gold layer. Monoclinic Ga2O3 structure was identified by X-ray diffraction XRD and electron diffraction patterns. High-resolution transmission electron microscopy revealed that these nanowires were single crystalline in nature. Energy dispersive X-ray indicated stoichiometric composition of the nanomaterial. Photoluminescence measurement under excitation at 250 nm showed that these nanowires had three emission peaks at 373, 410 and 475 nm, which may be attributed to the defects such as oxygen vacancy (VO) and gallium-oxygen vacancy pair (VO,VGa).", keywords = "β-GaO, Growth mechanism, Nanostructure, Photoluminescence, Physical vapor deposition", author = "Pinaki Guha and Supriya Chakrabarti and Subhadra Chaudhuri", year = "2004", month = jun, day = "1", doi = "10.1016/j.physe.2004.01.003", language = "English", volume = "23", pages = "81--85", journal = "Physica E: Low-dimensional Systems and Nanostructures", issn = "1386-9477", publisher = "Elsevier BV", number = "1-2", } . Physica E: Low-dimensional Systems and Nanostructures.
Optical and microstructural characterization of CdS-ZnO nanocomposite thin films prepared by sol-gel technique @article{15bcacb5b5d843ec842c4e7e845857b4, title = "Optical and microstructural characterization of CdS-ZnO nanocomposite thin films prepared by sol-gel technique", abstract = "CdS-ZnO nanocomposite thin films were prepared using the sol-gel technique. Highly confined nanoparticles of CdS (radius 1.8-4.7 nm) were obtained with ZnO as the matrix. The molar ratio of CdS and ZnO was varied within the range 20 : 80 to 60 : 40. The influence of the annealing temperature (373-573 K) on the particle size was studied from the blue shift (0.1-0.7 eV) of the absorption edge and transmission electron microscopy. The microstructural characterization by high resolution transmission electron microscopy indicated well-resolved crystalline nanoparticles. Photoluminescence studies indicated three surface related peaks at 2.33, 2.19 and 1.89 eV for all the CdS-ZnO nanocomposites. The optical band gap (Eg) determined without preassuming the nature of the optical transition varied in the range 2.52-3.16 eV with variation of the annealing temperature, showing excellent carrier confinement of the CdS nanoparticles within the wide band gap ZnO matrix. This study indicated ZnO to be a good capping material for CdS nanoparticles.", author = "Panda, \{S. K.\} and S. Chakrabarti and B. Satpati and Satyam, \{P. V.\} and S. Chaudhuri", year = "2004", month = feb, day = "21", doi = "10.1088/0022-3727/37/4/014", language = "English", volume = "37", pages = "628--633", journal = "Journal of Physics D: Applied Physics", issn = "0022-3727", publisher = "Institute of Physics", number = "4", } . Journal of Physics D: Applied Physics.
Panda, S.K., Chakrabarti, S., Satpati, B., Satyam, P.V., Chaudhuri, S., Panda, S.K., Chakrabarti, S., Satpati, B., Satyam, P.V., Chaudhuri, S.(2004). Optical and microstructural characterization of CdS-ZnO nanocomposite thin films prepared by sol-gel technique . Journal of Physics D: Applied Physics. 37. (4). p. 628-633.
Guha, P., Chakrabarti, S., Chaudhuri, S., Guha, P., Chakrabarti, S., Chaudhuri, S.(2004). Synthesis of β-Ga<inf>2</inf>O<inf>3</inf> nanowire from elemental Ga metal and its photoluminescence study . Physica E: Low-Dimensional Systems and Nanostructures. 23. (1-2). p. 81-85.
Chakrabarti, S., Ganguli, D., Chaudhuri, S., Chakrabarti, S., Ganguli, D., Chaudhuri, S.(2004). Excitonic and defect related transitions in ZnO-SiO<inf>2</inf> nanocomposites synthesized by sol-gel technique . Physica Status Solidi (A) Applied Research. 201. (9). p. 2134-2142.
Chakrabarti, S., Ganguli, D., Chaudhuri, S., Chakrabarti, S., Ganguli, D., Chaudhuri, S.(2004). Optical properties of γ-Fe<inf>2</inf>O<inf>3</inf> nanoparticles dispersed on sol-gel silica spheres . Physica E: Low-Dimensional Systems and Nanostructures. 24. (3-4). p. 333-342.
Chakrabarti, S., Ganguli, D., Chaudhuri, S., Chakrabarti, S., Ganguli, D., Chaudhuri, S.(2004). Substrate dependence of preferred orientation in sol-gel-derived zinc oxide films . Materials Letters. 58. (30). p. 3952-3957.
Chakrabarti, S., Chaudhuri, S., Chakrabarti, S., Chaudhuri, S.(2004). Microstructural and photoluminescent characterization of one-dimensional ZnO nanostructures prepared by catalyst-assisted vapour-liquid-solid technique . Materials Chemistry and Physics. 87. (1). p. 196-200.
Preparation of hydroxide-free magnesium oxide films by an alkoxide-free sol-gel technique @article{ce914b8bde274a5496fa64517b1bbe0d, title = "Preparation of hydroxide-free magnesium oxide films by an alkoxide-free sol-gel technique", abstract = "Crystalline films of magnesium oxide (periclase and the {"}β{"}-phase) with or without magnesium hydroxide were deposited on soda lime glass and n-type silicon (100) substrates by sol-gel method with a view to controlling the formation of magnesium hydroxide and studying its role of hydroxide in the grain growth of MgO film. The gel films were crystallized by annealing at 500 °C (rapid thermal processing, RTP, or vacuum annealing) and 800 °C (air annealing). The phase assemblage was found to be dependent on the cleaning method of the substrate; when the cleaning method was essentially non-aqueous, no hydroxide crystallized in the annealed films. Aging of the annealed films under a humid atmosphere (65-75\% relative humidity) led to the generation of Mg(OH)2 in freshly prepared (hydroxide-free) films and increase in its formation when it was already present. Hydroxide-free films showed significant growth in grain size compared to the other films, indicating a possible inhibiting role of the hydroxide in grain growth.", keywords = "Magnesium hydroxide, Magnesium oxide, Soda lime glass, Sol-gel", author = "S. Chakrabarti and D. Ganguli and S. Chaudhuri", year = "2003", month = nov, day = "1", doi = "10.1016/S0167-577X(03)00348-3", language = "English", volume = "57", pages = "4483--4492", journal = "Materials Letters", issn = "0167-577X", publisher = "Elsevier BV", number = "29", } . Materials Letters.
Tailoring of room temperature excitonic luminescence in sol-gel zinc oxide-silica nanocomposite films @article{331ce2eaadd04e688c0f44501985e08c, title = "Tailoring of room temperature excitonic luminescence in sol-gel zinc oxide-silica nanocomposite films", abstract = " Zinc oxide-silica (ZnO/SiO 2 = 20:80, molar ratio) nanocomposites consisting of ZnO nanoparticles embedded in a dielectric matrix were prepared by a sol-gel technique (spin coating). Optical transmittance, Raman effect and photoluminescence measurements of the composites indicated effective capping of the ZnO nanoparticles (radii 1.4-1.5 nm) in the host showing practically no variation of particle size with the post-deposition-annealing treatments. The blue shift of the band gap (4.23-4.29 eV) from that of bulk ZnO (3.3 eV) indicated strong carrier confinement for samples annealed at T≤773 K. Highly intense UV emission (approx. 4.2 eV) at room temperature could be obtained by annealing the composites in static oxygen atmosphere, while the visible defect-related luminescence (approx. 2.62 and 2. 43 eV) could be reduced, resulting in a high intensity ratio (approx. 27) of the two.", keywords = "Luminescence, Nanostructures, Optical properties, Zinc oxide", author = "S. Chakrabarti and D. Das and D. Ganguli and S. Chaudhuri", year = "2003", month = sep, day = "22", doi = "10.1016/S0040-6090(03)00862-9", language = "English", volume = "441", pages = "228--237", journal = "Thin Solid Films", issn = "0040-6090", publisher = "Elsevier BV", number = "1-2", } . Thin Solid Films.
Synthesis of γ-Fe 2 O 3 nanoparticles coated on silica spheres @article{cdedf857d10a4034ab407e1af2a79a80, title = "Synthesis of γ-Fe 2 O 3 nanoparticles coated on silica spheres: Structural and magnetic properties", abstract = " The structural and magnetic properties of γ-Fe 2 O 3 nanoparticles dispersed on silica spheres prepared by sol-gel method were investigated. The properties of γ-Fe 2 O 3 nanoparticles without silica were compared with those on silica spheres. Both the nanoparticle assemblages were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), M{\"o}ssbauer (20, 80 and 300 K) and electron paramagnetic resonance (EPR) (80, 300 K) measurements. The XRD spectra clearly indicated the formation of pure γ-Fe 2 O 3 nanoparticles and the absence of any other form of iron oxide. TEM images showed a uniform distribution of the nanoparticles of size ∼6 nm on the surfaces of silica spheres (diameter ∼35-60 nm). The size of the individual nanoparticles (without silica) varied within 5-6 nm. The low temperature (20 K) M{\"o}ssbauer spectra consisted of a partially split sextet superimposed on a doublet. The partial magnetic splitting of the sextet at 20 K revealed the effect of surface magnetization and surface modifications of the γ-Fe 2 O 3 nanoparticles coated on silica spheres. The gradual collapse of the partially split sextet into a doublet with increasing temperature indicated the superparamagnetic relaxation exhibited by the γ-Fe 2 O 3 nanoparticles with/without silica. The surface magnetization arising out of mis-aligned spins at the surface as evidenced by M{\"o}ssbauer spectra was further confirmed by electron paramagnetic resonance (EPR) studies.", author = "S. Chakrabarti and Mandal, \{S. K.\} and Nath, \{B. K.\} and D. Das and D. Ganguli and S. Chaudhuri", year = "2003", month = jul, day = "1", doi = "10.1140/epjb/e2003-00208-2", language = "English", volume = "34", pages = "163--171", journal = "European Physical Journal B", issn = "1434-6028", publisher = "Springer New York", number = "2", } . European Physical Journal B.
Photoluminescence of ZnO nanocrystallines confined in sol-gel silica matrix @article{47405fdc1f9044c2ad3b7245b607795d, title = "Photoluminescence of ZnO nanocrystallines confined in sol-gel silica matrix", abstract = "ZnO-SiO2 composite films consisting of ZnO nanoparticles embedded in a SiO2 matrix (ZnO:SiO2 = 20:80 molar ratio) were prepared by the sol-gel technique. Annealing in the range 473-773 K in air, hydrogen and oxygen atmospheres showed high stability of the particle radius due to effective capping within the silica matrix. The optical band gap in the composite films varied in the range 4.23-4.29 eV with variation of particle radius from 1.42 to 1.47 nm due to quantum confinement. Photoluminescence (PL) spectra of ZnO nanoparticles recorded in the range 80-300 K showed two defect level emission bands within 2.38-2.66 eV and the excitonic emission band centred at ∼4.22 eV. The effect of atmosphere controlled annealing was also studied with a view to understanding and controlling the visible defect-related luminescence in comparison to the UV excitonic luminescence. It was observed that the intensity of the two defect-related peaks observed in the PL spectrum could be decreased substantially by annealing the films (at ∼773 K) in oxygen atmosphere. The intensity ratio of the excitonic peak to the defect level peak could be increased up to 5:1 at room temperature (∼300 K) and 7:1 at low temperature (∼80 K).", author = "S. Chakrabarti and D. Ganguli and S. Chaudhuri", year = "2003", month = jan, day = "21", doi = "10.1088/0022-3727/36/2/311", language = "English", volume = "36", pages = "146--151", journal = "Journal of Physics D: Applied Physics", issn = "0022-3727", publisher = "Institute of Physics", number = "2", } . Journal of Physics D: Applied Physics.
Chakrabarti, S., Ganguli, D., Chaudhuri, S., Chakrabarti, S., Ganguli, D., Chaudhuri, S.(2003). Photoluminescence of ZnO nanocrystallines confined in sol-gel silica matrix . Journal of Physics D: Applied Physics. 36. (2). p. 146-151.
Chakrabarti, S., Mandal, S.K., Nath, B.K., Das, D., Ganguli, D., Chaudhuri, S., Chakrabarti, S., Mandal, S.K., Nath, B.K., Das, D., et al.(2003). Synthesis of γ-Fe<inf>2</inf> O<inf>3</inf> nanoparticles coated on silica spheres: Structural and magnetic properties . European Physical Journal B. 34. (2). p. 163-171.
Chakrabarti, S., Das, D., Ganguli, D., Chaudhuri, S., Chakrabarti, S., Das, D., Ganguli, D., Chaudhuri, S.(2003). Tailoring of room temperature excitonic luminescence in sol-gel zinc oxide-silica nanocomposite films . Thin Solid Films. 441. (1-2). p. 228-237.
Chakrabarti, S., Ganguli, D., Chaudhuri, S., Chakrabarti, S., Ganguli, D., Chaudhuri, S.(2003). Preparation of hydroxide-free magnesium oxide films by an alkoxide-free sol-gel technique . Materials Letters. 57. (29). p. 4483-4492.
Crystalline magnesium oxide films on soda lime glass by sol-gel processing @article{48caa4a1c499458ca94d413a74726970, title = "Crystalline magnesium oxide films on soda lime glass by sol-gel processing", abstract = "Well-crystallized and large-grained magnesium oxide films were deposited onto soda lime glass substrates by sol-gel technique. The films could be synthesized at a relatively low annealing temperature ( ∼ 500 °C). The films were dense and characterized by strong reflections from (200) plane for periclase phase and from (400) plane for the β-phase.", keywords = "β-MgO, Magnesium oxide, Rapid thermal processing, Soda lime glass, Sol-gel, Thin films", author = "S. Chakrabarti and D. Ganguli and S. Chaudhuri and Pal, \{A. K.\}", year = "2002", month = may, day = "1", doi = "10.1016/S0167-577X(01)00548-1", language = "English", volume = "54", pages = "120--123", journal = "Materials Letters", issn = "0167-577X", publisher = "Elsevier BV", number = "2-3", } . Materials Letters.
Chakrabarti, S., Ganguli, D., Chaudhuri, S., Pal, A.K., Chakrabarti, S., Ganguli, D., Chaudhuri, S., Pal, A.K.(2002). Crystalline magnesium oxide films on soda lime glass by sol-gel processing . Materials Letters. 54. (2-3). p. 120-123.
Metal nanoparticle‐hydrogel nanocomposites for biomedical applications – An atmospheric pressure plasma synthesis approach .
CONFERENCE PAPER
Fabrication of nanostructures by plasma and laser assisted synthesis in liquids @inproceedings{102d2afabe0349f4b621124e60c6f637, title = "Fabrication of nanostructures by plasma and laser assisted synthesis in liquids", abstract = "In this paper capabilities of electrical discharge plasma and laser irradiation processes in liquids for synthesis of nanoparticles (NPs) of different morphology and composition are discussed. The main attention has been focused on the properties of carbon, silicon, as well as alloyed and composite NPs. Particles with size in the nanometric range (3-50 nm) with different crystal structures were produced depending on the preparation procedure. In addition, the targeted changes of the NPs properties (their size and composition) were shown to be sensitively controlled via additional plasma and laser treatment of the prepared suspensions. It is supposed that under additional laser irradiation the compound nanoparticles are formed in result of nanoparticles heating, co-melting and chemical reactions in the liquid droplet.", keywords = "Ag-Cu alloys, carbon nanodots, electrical discharge in liquid, laser ablation in liquid, SiC nanoparticles", author = "Tarasenka, \{N. N.\} and Nevar, \{A. A.\} and Butsen, \{A. V.\} and Tarasenko, \{N. V.\} and T. Velusamy and S. Chakrabarti and D. Mariotti and H. Kabbara and A. Nomin{\'e} and T. Belmonte", year = "2017", month = dec, day = "12", doi = "10.1109/NAP.2017.8190185", language = "English", volume = "2017-January", booktitle = "Proceedings of the 2017 IEEE 7th International Conference on Nanomaterials", publisher = "Institute of Electrical and Electronics Engineers Inc.", address = "United States", note = "7th IEEE International Conference on Nanomaterials: Applications and Properties, NAP 2017 ; Conference date: 10-09-2017 Through 15-09-2017", } . Proceedings of the 2017 IEEE 7th International Conference on Nanomaterials.
Tarasenka, N.N., Nevar, A.A., Butsen, A.V., Tarasenko, N.V., Velusamy, T., Chakrabarti, S., Mariotti, D., Kabbara, H., Nomin&#233;, A., Belmonte, T.(2017). Fabrication of nanostructures by plasma and laser assisted synthesis in liquids . Proceedings of the 2017 IEEE 7th International Conference on Nanomaterials: Applications and Properties, NAP 2017. 2017-January.
Chakrabarti, S., Pan, L., Tanaka, H., Nakayanna, Y., Chakrabarti, S., Pan, L., Tanaka, H., Nakayanna, Y.(2005). Field emission properties of MgO coated multiwalled aligned CNTs . IDW/AD'05 - Proceedings of the 12th International Display Workshops in Conjunction with Asia Display 2005. (2). p. 1667-1670.
SYNTHESIS OF SILICON CARBIDE NANOPARTICLES BY PLASMA-ASSISTED TECHNIQUES IN LIQUIDS .