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USD 95 /hr

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☆☆☆☆☆

Hire Dr. Joseph S Y.

United States

USD 95 /hr

Ph.D. in Chemistry with 11+ years in tutoring and 8+ years in academic scientific writing

Profile Summary

Synthetic process chemist highly skilled in developing multi-step protocols for synthesizing and isolating small molecules with differing functional groups. Contributor to high-impact projects aimed at solving challenges pertaining to ligand binding efficiency, stability of reactive intermediates, and activation of inert substrates. Semiconductor process engineer responsible for developing, monitoring, and optimizing dry etch processes in support of leading-node semiconductor manufacturing, with a focus on process stability, yield enhancement, and continuous improvement. Synthetic Process Chemist • Design of multistep organic synthesis • Ligand screening and optimization • Purification of organic compounds (preparatory TLC, flash chromatography, distillation, sublimation, recrystallization) • Structural determination by HR-MS, NMR, X-ray crystallography • Quantitative analysis by LC-MS, GC-FID • Homogeneous and heterogenous catalysis • Computational chemistry Semiconductor Process Engineer • Improvement of etch processes for critical patterning steps in transistor design • Driving process stability, tool qualification, and SPC monitoring for fab sustainability • Leading DOE-based experiments for process optimization and tool matching • Collaborating cross-functionally with integration and equipment engineering teams to contain and resolve wafer excursions • Skilled with JMP, Excel, SQL

Subject Matter Expertise

• ☆ Inorganic Chemistry
• ☆ Polymer Chemistry
• ☆ Analytical Chemistry
• ☆ Separation & Purification
• ☆ Crystallography
• ☆ X-Ray Crystallography
• ☆ Spectrophotometry
• ☆ Mass Spectrometry
• ☆ Liquid Chromatography/HPLC
• ☆ Gas Chromatography
• ☆ Organometallic Chemistry

Services

• Writing
• Research
• Consulting
• Data & AI
• Product Development

Writing Technical Writing

Research Scientific and Technical Research, Systematic Literature Review

Consulting Scientific and Technical Consulting

Data & AI Statistical Analysis

Product Development Manufacturing

Work Experience

Chemical engineer

Intel

October 2024 - Present

Research Assistant

University of California, San Diego

September 2020 - August 2024

Research Assistant

California State University Northridge

January 2016 - July 2020

Education

PhD (Chemistry and Biochemistry)

University of California, San Diego

September 2020 - August 2024

Doctorate

University of California San Deigo

September 2020 - June 2024

Certifications

• Chemistry Instructor

  California State University Northridge

  January 2017 - August 2020

Publications

JOURNAL ARTICLE

Joseph S. Yoon, Mehdi Abdellaoui, Milan Gembicky, Guy Bertrand (2024). A carbene-stabilized diphosphorus: a triple-bonded diphosphorus (PP) and a bis(phosphinidene) (P–P) transfer agent . Chemical Science.

Liang Hu, Guangrong Meng, Xiangyang Chen, Joseph S. Yoon, Jing-Ran Shan, Nikita Chekshin, Daniel A. Strassfeld, Tao Sheng, Zhe Zhuang, Rodolphe Jazzar, et al. (2023). Enhancing Substrate–Metal Catalyst Affinity via Hydrogen Bonding: Pd(II)-Catalyzed β-C(sp³)–H Bromination of Free Carboxylic Acids . Journal of the American Chemical Society.

Joseph S Yoon, Nicolas Cena, Chantal Markarian, Yann Schrodi (2023). Olefin metathesis catalysts bearing hemilabile NHC ligands: Effect of remote torsional strain on activity . Journal of Catalysis.

Joseph S Yoon, Nicolas Cena, Yann Schrodi (2020). Robust Olefin Metathesis Catalyst Bearing a Tridentate Hemilabile NHC Ligand . Organometallics.