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USD 40 /hr
Hire Dr. Greg McMahon
United Kingdom
USD 40 /hr

Data Analysis and Modeling, Scientific Writing, Materials Characterization, Fellow Royal Microscopical Society

Profile Summary
Subject Matter Expertise
Services
Work Experience

Principal Research Scientist

National Physical Laboratory

March 2018 - Present

Senior Experimental Officer

University of Manchester

October 2015 - March 2018

Electron Microscopy Facility Manager

Boston College

April 2008 - September 2015

Assistant Director, National Resource for Imaging Mass Spectrometry

Brigham and Women's Hospital / Harvard Medical School

May 2004 - April 2008

Research Scientist

Fibics Inc.

June 2000 - April 2004

Research Scientist

Natural Resources Canada

July 1994 - June 2000

Education

Ph.D

Universität des Saarlandes

June 1990 - June 1994

M.Sc.

Queen's University

September 1985 - February 1988

B.Sc.

Queen's University

September 1981 - May 1985

Certifications
  • Certification details not provided.
Publications
JOURNAL ARTICLE
Zhang, Z., Moore, K.L., McMahon, G., Morana, R., Preuss, M.(2019). On the role of precipitates in hydrogen trapping and hydrogen embrittlement of a nickel-based superalloy . Corrosion Science. 146. p. 58-69.
McMahon, Greg, Sneed, Brian T., Golden, Matthew C., Liu, Yejing, Lee, Hiang K., Andoni, Ilektra, Young, Allison P., Erdman, Natasha, Shibata, Masateru, Ling, Xing Yi, et al.(2016). Promotion of the halide effect in the formation of shaped metal nanocrystals via a hybrid cationic, polymeric stabilizer: Octahedra, cubes, and anisotropic growth . Surface Science. 648. p. 307-312.
Papineau, D., De Gregorio, B., Fearn, S., Kilcoyne, D., McMahon, G., Purohit, R., Fogel, M.(2016). Nanoscale petrographic and geochemical insights on the origin of the Palaeoproterozoic stromatolitic phosphorites from Aravalli Supergroup, India . Geobiology. 14. (1). p. 3-32.
Sneed, B.T., Golden, M.C., Liu, Y., Lee, H.K., Andoni, I., Young, A.P., McMahon, G., Erdman, N., Shibata, M., Ling, X.Y., et al.(2016). Promotion of the halide effect in the formation of shaped metal nanocrystals via a hybrid cationic, polymeric stabilizer: Octahedra, cubes, and anisotropic growth . Surface Science. 648. p. 307-312.
Jang, Ji-Wook, Du, Chun, Ye, Yifan, Lin, Yongjing, Yao, Xiahui, Thorne, James, Liu, Erik, McMahon, Gregory, Zhu, Junfa, Javey, Ali, et al.(2015). Enabling unassisted solar water splitting by iron oxide and silicon . Nature Communications. 6.
Jang, J.-W., Du, C., Ye, Y., Lin, Y., Yao, X., Thorne, J., Liu, E., McMahon, G., Zhu, J., Javey, A., et al.(2015). Enabling unassisted solar water splitting by iron oxide and silicon . Nature Communications. 6.
Dai, P., Li, W., Xie, J., He, Y., Thorne, J., McMahon, G., Zhan, J., Wang, D.(2014). Forming buried junctions to enhance the photovoltage generated by cuprous oxide in aqueous solutions . Angewandte Chemie - International Edition. 53. (49). p. 13493-13497.
Dai, Pengcheng, Li, Wei, Xie, Jin, He, Yumin, Thorne, James, McMahon, Gregory, Zhan, Jinhua, Wang, Dunwei(2014). Forming Buried Junctions to Enhance the Photovoltage Generated by Cuprous Oxide in Aqueous Solutions . Angewandte Chemie-International Edition. 53. (49). p. 13493-13497.
Du, C., Yang, X., Mayer, M.T., Hoyt, H., Xie, J., McMahon, G., Bischoping, G., Wang, D.(2013). Hematite-based water splitting with low turn-on voltages . Angewandte Chemie - International Edition. 52. (48). p. 12692-12695.
Du, Chun, Yang, Xiaogang, Mayer, Matthew T., Hoyt, Henry, Xie, Jin, McMahon, Gregory, Bischoping, Gregory, Wang, Dunwei(2013). Hematite-Based Water Splitting with Low Turn-On Voltages . Angewandte Chemie-International Edition. 52. (48). p. 12692-12695.
She, Zhenbing, Strother, Paul, McMahon, Gregory, Nittler, Larry R., Wang, Jianhua, Zhang, Jianhua, Sang, Longkang, Ma, Changqian, Papineau, Dominic(2013). Terminal Proterozoic cyanobacterial blooms and phosphogenesis documented by the Doushantuo granular phosphorites I: In situ micro-analysis of textures and composition . Precambrian Research. 235. p. 20-35.
Lin, Y., Xu, Y., Mayer, M.T., Simpson, Z.I., McMahon, G., Zhou, S., Wang, D.(2012). Growth of p-type hematite by atomic layer deposition and its utilization for improved solar water splitting . Journal of the American Chemical Society. 134. (12). p. 5508-5511.
Zhao, Huaizhou, Rizal, Binod, McMahon, Gregory, Wang, Hengzhi, Dhakal, Pashupati, Kirkpatrick, Timothy, Ren, Zhifeng, Chiles, Thomas C., Naughton, Michael J., Cai, Dong(2012). Ultrasensitive Chemical Detection Using a Nanocoax Sensor . Acs Nano. 6. (4). p. 3171-3178.
Lin, Yongjing, Xu, Yang, Mayer, Matthew T., Simpson, Zachary I., McMahon, Gregory, Zhou, Sa, Wang, Dunwei(2012). Growth of p-Type Hematite by Atomic Layer Deposition and Its Utilization for Improved Solar Water Splitting . Journal of the American Chemical Society. 134. (12). p. 5508-5511.
Mcmahon, G., Rizal, B., Burns, M., Chiles, T., Archibald, M., Naughton, M., Shepard, S., Erdman, N., Kikuchi, N.(2012). High Resolution Scanning Electron Microscopy of Surface Functionalized Nanocoax Biosensors . Microscopy and Microanalysis. 18. p. 276-277.
Zhao, H., Rizal, B., McMahon, G., Wang, H., Dhakal, P., Kirkpatrick, T., Ren, Z., Chiles, T.C., Naughton, M.J., Cai, D.(2012). Ultrasensitive chemical detection using a nanocoax sensor . ACS Nano. 6. (4). p. 3171-3178.
Dhakal, Pashupati, McMahon, G., Shepard, S., Kirkpatrick, T., Oh, J. I., Naughton, M. J.(2010). Direct-write, focused ion beam-deposited, 7 K superconducting C-Ga-O nanowire . Applied Physics Letters. 96. (26).
McMahon, Greg, Edwards, David, Robertson, Vern, Erdman, Natasha(2010). Failure Analysis: The Old and the New . Advanced Materials & Processes. 168. (5). p. 23-25.
Dhakal, P., McMahon, G., Shepard, S., Kirkpatrick, T., Oh, J.I., Naughton, M.J.(2010). Direct-write, focused ion beam-deposited, 7 K superconducting C-Ga-O nanowire . Applied Physics Letters. 96. (26).
Naughton, M.J., Kempa, K., Ren, Z.F., Gao, Y., Rybczynski, J., Argenti, N., Gao, W., Wang, Y., Peng, Y., Naughton, J.R., et al.(2010). Efficient nanocoax-based solar cells . Physica Status Solidi - Rapid Research Letters. 4. (7). p. 181-183.
Naughton, M. J., Kempa, K., Ren, Z. F., Gao, Y., Rybczynski, J., Argenti, N., Gao, W., Wang, Y., Peng, Y., Naughton, J. R., et al.(2010). Efficient nanocoax-based solar cells . Physica Status Solidi-Rapid Research Letters. 4. (7). p. 181-183.
McMahon, G., Paudel, T., Ren, Z.F., Naughton, M.J.(2009). In-situ electrical measurements of vertically aligned nanostructures . Microscopy and Microanalysis. 15. (SUPPL. 2). p. 708-709.
McMahon, G., Paudel, T., Ren, Z. F., Naughton, M. J.(2009). In-situ electrical measurements of vertically aligned nanostructures . Microscopy and Microanalysis. 15. p. 708-709.
McMahon, G., Rybczynski, J., Wang, Y., Gao, Y., Argenti, N., Kempa, K., Ren, Z.F., Naughton, M.J.(2009). Application of dual beam FIB to the metrology of nanostructured photovoltaic devices . Microscopy and Microanalysis. 15. (SUPPL. 2). p. 1392-1393.
McMahon, G., Rybczynski, J., Wang, Y., Gao, Y., Argenti, N., Kempa, K., Ren, Z. F., Naughton, M. J.(2009). Application of Dual Beam FIB to the metrology of nanostructured photovoltaic devices . Microscopy and Microanalysis. 15. p. 1392-1393.
Lechene, C.P., Luyten, Y., McMahon, G., Distel, D.L.(2007). Quantitative imaging of nitrogen fixation by individual bacteria within animal cells . Science. 317. (5844). p. 1563-1566.
Lechene, C. P., Luyten, Y., McMahon, G., Distel, D. L.(2007). Quantitative imaging of nitrogen fixation by individual bacteria within animal cells (vol 317, pg 1563, 2007) . Science. 318. (5850). p. 570.
Lechene, C.P., Luyten, Y., McMahon, G., Distel, D.L.(2007). Erratum: Quantitative imaging of nitrogen fixation by individual bacteria within animal cells (Science (1563)) . Science. 318. (5850). p. 570.
Lechene, Claude P., Luyten, Yvette, McMahon, Gregory, Distel, Daniel L.(2007). Quantitative imaging of nitrogen fixation by individual bacteria within animal cells . Science. 317. (5844). p. 1563-1566.
McMahon, G., Glassner, B.J., Lechene, C.P.(2006). Quantitative imaging of cells with multi-isotope imaging mass spectrometry (MIMS)-Nanoautography with stable isotope tracers . Applied Surface Science. 252. (19). p. 6895-6906.
Luyten, Y. A., Distel, D. L., Lee, R. W., McMahon, G., Lechene, C. P.(2006). In situ quantitative imaging of N-fixation by intracellular symbionts in the wood-boring bivalve Lydorus pedicellatus (Bivalia : Teredinidae) . Abstracts of the General Meeting of the American Society for Microbiology. 106. p. 411.
McMahon, G., Saint-Cyr, H. Francois, Lechene, C., Unkefer, C. J.(2006). CN- secondary ions form by recombination as demonstrated using multi-isotope mass spectrometry of C-13- and N-15-labeled polyglycine . Journal of the American Society For Mass Spectrometry. 17. (8). p. 1181-1187.
McMahon, Greg, Glassner, Brian J., Lechene, Claude P.(2006). Quantitative imaging of cells with multi-isotope imaging mass spectrometry (MIMS)-Nanoautography with stable isotope tracers . Applied Surface Science. 252. (19). p. 6895-6906.
McMahon, Greg, Lechene, Claude, Hillion, Francois, Benson, Douglas, Kleinfeld, Alan M, Kampf, J Patrick, Distel, Daniel, Luyten, Yvette, Bonventre, Joseph, Hentschel, Dirk, et al.(2006). High-resolution quantitative imaging of mammalian and bacterial cells using stable isotope mass spectrometry . Journal of biology. 5. (6). p. 20.
Lechene, C., Hillion, F., McMahon, G., Benson, D., Kleinfeld, A.M., Kampf, J.P., Distel, D., Luyten, Y., Bonventre, J., Hentschel, D., et al.(2006). High-resolution quantitative imaging of mammalian and bacterial cells using stable isotope mass spectrometry . Journal of Biology. 5.
McMahon, G., Saint-Cyr, H.F., Lechene, C., Unkefer, C.J.(2006). CN<sup>-</sup> Secondary Ions Form by Recombination as Demonstrated Using Multi-Isotope Mass Spectrometry of <sup>13</sup>C- and <sup>15</sup>N-Labeled Polyglycine . Journal of the American Society for Mass Spectrometry. 17. (8). p. 1181-1187.
Larocque, ACL, Stimac, JA, McMahon, G, Jackman, JA, Chartrand, VP, Hickmott, D, Gauerke, E(2002). Ion-microprobe analysis of FeTi oxides: Optimization for the determination of invisible gold . Economic Geology and the Bulletin of the Society of Economic Geologists. 97. (1). p. 159-164.
Larocque, A.C.L., Stimac, J.A., McMahon, G., Jackman, J.A., Chartrand, V.P., Hickmott, D., Gauerke, E.(2002). Ion-microprobe analysis of FeTi oxides: Optimization for the determination of invisible gold . Economic Geology. 97. (1). p. 159-164.
Bortnikov, N.S., Cabri, L., Vikent&#39;ev, I.V., McMahon, G., Bogdanov, Yu.A.(2000). Invisible gold in sulfides from recent submarine hydrothermal mounds . Doklady Earth Sciences. 373. p. 863-866.
Bortnikov, NS, Cabri, L, Vikent&#39;ev, IV, McMahon, G, Bogdanov, YA(2000). Invisible gold in sulfides from recent submarine hydrothermal mounds . Doklady Earth Sciences. 373. (5). p. 863-866.
Cabri, L.J., Newville, M., Gordon, R.A., Crozier, E.D., Sutton, S.R., McMahon, G., Jiang, D.-T.(2000). Chemical speciation of gold in arsenopyrite . Canadian Mineralogist. 38. (5). p. 1265-1281.
Steele, IM, Cabri, LJ, Gaspar, JC, McMahon, G, Marquez, MA, Vasconcellos, MAZ(2000). Comparative analysis of sulfides for gold using SXRF and SIMS . Canadian Mineralogist. 38. p. 1-10.
Cabri, LJ, Newville, M, Gordon, RA, Crozier, ED, Sutton, SR, McMahon, G, Jiang, DT(2000). Chemical speciation of gold in arsenopyrite . Canadian Mineralogist. 38. p. 1265-1281.
Steele, I.M., Cabri, L.J., Gaspar, J.C., McMahon, G., Marquez, M.A., Vasconcellos, M.A.Z.(2000). Comparative analysis of sulfides for gold using SXRF and SIMS . Canadian Mineralogist. 38. (1). p. 1-10.
Aug&#233;, T., Cabri, L.J., Legendre, O., McMahon, G., Cocherie, A.(1999). PGE distribution in base-metal alloys and sulfides of the New Caledonia ophiolite . Canadian Mineralogist. 37. (5). p. 1147-1161.
Leeb, J, Gebhardt, V, Muller, G, Haarer, D, Su, D, Giersig, M, McMahon, G, Spanhel, L(1999). Colloidal synthesis and electroluminescence properties of nanoporous (MnZnS)-Zn-II films . Journal of Physical Chemistry B. 103. (37). p. 7839-7845.
Auge, T, Cabri, LJ, Legendre, O, McMahon, G, Cocherie, A(1999). PGE distribution in base-metal alloys and sulfides of the New Caledonia ophiolite . Canadian Mineralogist. 37. p. 1147-1161.
Cabri, L.J., Gaspar, O.C., Lastra, R., McMahon, G.(1998). Distribution of gold in tin-rich samples from the Corvo orebody, Portugal . Canadian Mineralogist. 36. (5). p. 1347-1360.
Chen, W, Chaturvedi, MC, Richards, NL, McMahon, G(1998). Grain boundary segregation of boron in INCONEL 718 . Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science. 29. (7). p. 1947-1954.
Genkin, A.D., Bortnikov, N.S., Cabri, L.J., Wagner, F.E., Stanley, C.J., Safonov, Y.G., Mcmahon, G., Friedl, J., Kerzin, A.L., Gamyanin, G.N.(1998). A multidisciplinary study of invisible gold in arsenopyrite from four mesothermal gold deposits in Siberia, Russian Federation . Economic Geology. 93. (4). p. 463-487.
Genkin, AD, Bortnikov, NS, Cabri, LJ, Wagner, FE, Stanley, CJ, Safonov, YG, McMahon, G, Friedl, J, Kerzin, AL, Gamyanin, GN(1998). A multidisciplinary study of invisible gold in arsenopyrite from four mesothermal cold deposits in Siberia, Russian federation . Economic Geology and the Bulletin of the Society of Economic Geologists. 93. (4). p. 463-487.
Botton, G, Carpenter, G, Malis, T, Martineau, D, McMahon, G, Phaneuf, M, Wronski, Z(1998). Integrated characterization - a timely concept? . Electron Microscopy 1998, Vol 1. p. 37-38.
Cabri, LJ, Gaspar, OC, Lastra, R, McMahon, G(1998). Distribution of gold in tin-rich samples from the Corvo Orebody, Portugal . Canadian Mineralogist. 36. p. 1347-1360.
Oberth&#252;r, T., Cabri, L.J., Weiser, T.W., Mcmahon, G., M&#252;ller, P.(1997). Pt, Pd and other trace elements in sulfides of the Main Sulfide Zone, Great Dyke, Zimbabwe: A reconnaissance study . Canadian Mineralogist. 35. (3). p. 597-609.
Oberthur, T, Cabri, LJ, Weisner, TW, McMahon, G, Muller, P(1997). Pt, Pd and other trace elements in sulfides of the main sulfide zone, Great Dyke, Zimbabwe: A reconnaissance study . Canadian Mineralogist. 35. p. 597-609.
Genkin, AD, Cabri, LJ, Bortnikov, NS, McMahon, G, Stanley, CJ, Wagner, FE, Friedl, J, Safonov, YG, Gamyanin, GN(1997). Geology and characteristics of gold mineralization in four Siberian gold deposits, Russia . Global Exploitation of Heap Leachable Gold Deposits. p. 129-140.
Cabri, LJ, McMahon, G(1996). The quantitative determination of sub-PPM quantities of Au and Pt in sulfide minerals . Epd Congress 1996. p. 313-322.
KARZEL, H, MCMAHON, G, POTZEL, W, SCHIESSL, W, STEINER, M, HILLER, U, KALVIUS, GM, GLEITER, H, MITCHELL, DW, DAS, TP(1995). ZN-67-MOSSBAUER STUDY OF NANOSTRUCTURED ZNO . Hyperfine Interactions. 95. (1-4). p. 247-255.
MCMAHON, G, MALIS, T(1995). ULTRAMICROTOMY OF NANOCRYSTALLINE MATERIALS . Microscopy Research and Technique. 31. (4). p. 267-274.
Cabri, L.J., McMahon, G.(1995). SIMS analysis of sulfide minerals for Pt and Au: methodology and relative sensitivity factors (RSF) . Canadian Mineralogist. 33. (2). p. 349-359.
CABRI, LJ, MCMAHON, G(1995). SIMS ANALYSIS OF SULFIDE MINERALS FOR PT AND AU - METHODOLOGY AND RELATIVE SENSITIVITY FACTORS (RSF) . Canadian Mineralogist. 33. p. 349-359.
MCMAHON, G, CARPENTER, GJC, MALIS, TF(1991). ON THE GROWTH-MECHANISM OF SILICON-CARBIDE WHISKERS . Journal of Materials Science. 26. (20). p. 5655-5663.
BRATT, J, CORRIGAN, D, MCMAHON, G, PANT, A, SOOD, R, AHMAD, A, HOLT, R(1990). NOVEL SINTERING TECHNOLOGY FOR THE PRODUCTION OF ELECTRONIC CERAMICS . Advanced Materials - Application of Mineral and Metallurgical Processing Principles. p. 169-172.
MCMAHON, G, ERB, U(1989). STRUCTURAL TRANSITIONS IN ELECTROPLATED NI-P ALLOYS . Journal of Materials Science Letters. 8. (7). p. 865-868.
MCMAHON, G, WANG, SSB, QUON, DHH, SOOD, RR, HOLT, RT(1988). AN INTERFACIAL STUDY ON FIBER-REINFORCED LITHIUM ALUMINOSILICATE COMPOSITES . Cim Bulletin. 81. (914). p. 84.
BOOK
Rizal, B., Ye, F., Dhakal, P., Chiles, T.C., Shepard, S., McMahon, G., Burns, M.J., Naughton, M.J.(2013). Imprint-templated nanocoax array architecture: Fabrication and utilization . NATO Science for Peace and Security Series B: Physics and Biophysics. p. 359-370.
OTHER
Edwards, D., Robertson, V., Erdman, N., McMahon, G.(2010). Failure analysis: The old and the new . Advanced Materials and Processes. 168. (5). p. 23-25.
Louis J. Cabri, R. Lastra, G. McMahon, J.H.G. Laflamme, G. Deschenes (1998). MINERALOGICAL DISTRIBUTION OF Au AND Ag IN A COMPOSITE AND A TAILING SAMPLE FROM PASCUA, CHILE . CANMET.
Louis J. Cabri, J.M.D. Wilson, G. McMahon (1997). GOLD MINERALOGICAL BALANCES FROM TWO PROCESSED PRODUCTS FROM PASCUA, CHILE . CANMET.
CONFERENCE PAPER
Dhakal, P., McMahon, G., Norris, L., Oh, J.I., Naughton, M.J.(2010). FIB-deposited carbon-based superconducting nanowires with T<inf>c</inf>∼ 7 K . Materials Research Society Symposium Proceedings. 1206. p. 13-17.
Kojonen, K., Cabri, L.J., McMahon, G., Johanson, B., Leppinen, J., Kalapudas, R.(2008). Applied mineralogy of the Suurikuusikko refractory gold deposit, northern Finland . Australasian Institute of Mining and Metallurgy Publication Series. p. 277-284.
Genkin, A.D., Cabri, L.J., Bortnikov, N.S., McMahon, G., Stanley, C.J., Wagner, F.E., Friedl, J., Safonov, Y.G., Gamyanin, G.N.(1997). Geology and characteristics of gold mineralization in four Siberian Gold Deposits, Russia . TMS Annual Meeting. p. 129-140.
McMahon, Greg, Cabri, Louis J.(1996). Quantitative determination of sub-PPM quantities of Au and Pt in sulfide minerals . TMS Annual Meeting. p. 313-322.
BOOK CHAPTER
Kohls, M, Muller, G, Spanhel, L, Urlacher-Leluyer, C, Mugnier, J, Dumas, J, Plenet, JC, McMahon, G, Su, D, Giersig, M(2003). Nanocrystalline Er-III/Si-IV@ZnO multilayers: A detailed optical and structural study . Low-Dimensional Systems: Theory, Preparation, and Some Applications. 91. p. 107-120.
Dionne, S, Essadiqi, E, McMahon, G, Martin, P, Galvani, C, Szpunar, J, Jeong, HT, IRON STEEL SOC(1999). A study of recrystallization and phosphorus segregation during annealing of a rephosphorized interstitial free (IF) steel . 41st Mechanical Working and Steel Processing Conference Proceedings, Vol 37. 37. p. 235-243.
Karzel, H, McMahon, G, Hiller, U, Potzel, W, Schiessl, W, Steiner, M, Kalvius, GM, Gleiter, H(1996). Lattice dynamics of nanostructured ZnO . International Conference on the Applications of the Mossbauer Effect - Icame-95. 50. p. 513-516.
MCMAHON, G, MALIS, T(1993). TEM SPECIMEN PREPARATION OF NANOPHASE MATERIALS BY ULTRAMICROTOMY . Electron Microscopy and Analysis 1993. p. 349-352.
YING, JY, MCMAHON, G(1993). QUANTUM SIZE EFFECTS IN ZINC-OXIDE NANOCLUSTERS SYNTHESIZED BY REACTIVE SUBLIMATION . Nanophase and Nanocomposite Materials. 286. p. 73-79.
MCMAHON, G, PANT, A, SOOD, R, AHMAD, A, HOLT, RT(1991). MICROWAVE SINTERING TECHNOLOGY FOR THE PRODUCTION OF METAL-OXIDE VARISTORS . Microwave Processing of Materials Ii. 189. p. 237-242.
MCMAHON, G, MALIS, TF, CARPENTER, GJC(1991). A STUDY OF SILICON-CARBIDE WHISKERS USING ANALYTICAL ELECTRON-MICROSCOPY . Electron Microscopy and Analysis 1991. 119. p. 287-290.