Judith Yang

Department of Chemical and Petroleum Engineering, University of Pittsburgh
Ph.D., Physics, Cornell University, 1993

Surface Reactions (oxidation, catalysis) and Electron Microscopy (in situ)

Dealing with oxidation is a major societal priority, yet oxidation also presents a fascinating challenge in thin film growth.  Classical theories of oxidation were based mostly on thermogravimetric analysis (TGA) that only measures weight change, not structural changes.  Hence, classical theories assume a uniform film growth, yet it is well known that oxides do not develop as uniform films.  Recent developments of in situ experimental tools permit visualization of the dynamic processes at the nanoscale.  Yang’s research group uses in situ ultra-high vacuum transmission electron microscopy (UHV-TEM) to improve the fundamental understanding of oxidation; figure 1 are bright field images of Cu and Cu-5%Ni thin films during oxidation at P(O2) 10-4 Torr in situ, where oxide islands are seen to nucleate and grow and their shapes depend sensitively on temperature.  Heteroepitaxial concepts, based on surface diffusion, strain and structural evolution, describe surprisingly well these initial oxidation stages.

Most Cited Publications
  1. “Shape-dependent catalytic properties of Pt nanoparticles,” Simon Mostafa, Farzad Behafarid, Jason R. Croy, Luis K. Ono, Long Li, Judith C. Yang, Anatoly I. Frenkel, and Beatriz Roldan Cuenya, Journal of the American Chemical Society, 132(44), 15714 (2010)
  2. "Highly selective plasma-activated catalysts for carbon dioxide reduction to ethylene," Mistry, H., Varela, A.S., Bonifacio, C.S., (...), Strasser, P., Cuenya, B.R. Nature Communications 7,12123 (2016)
  3. "Self-limiting oxidation of copper,"     Yang, J.C., Kolasa, B., Gibson, J.M., Yeadon, M. Applied Physics Letters 73(19), 2841-2843 (1998)
  4. "Transient oxidation of NiAl,"     Yang, J.C., Schumann, E., Levin, I., Rühle, M. Acta Materialia 46(6), 2195-2201 (1998)
  5. “Sub-nanometer Au monolayer-protected clusters exhibiting molecule-like electronic behavior: quantitative high-angle annular dark-field scanning transmission electron microscopy and electrochemical characterization of clusters with precise atomic stoichiometry,” Laurent D. Menard, Shang-Peng Gao, Huiping Xu, Ray D. Twesten, Amanda S. Harper, Yang Song, Gangli Wang, Alicia D. Douglas, Judith C. Yang, Anatoly I. Frenkel, Ralph G. Nuzzo, and Royce W. Murray, J. Phys. Chem. B 110, 12874 (2006)
Recent Publications
  1. "Flood Damage Reduction in Land Subsidence Areas by Groundwater Management." Chang, Yin-Lung, Jinn-Chuang Yang, Yeou-Koung Tung, Chehao Chang, and Tung-Lin Tsai. In Flood Risk Management. IntechOpen, (2018).
  2. "LBA58 Intracranial efficacy of brigatinib (BRG) vs crizotinib (CRZ) in the phase III ALTA-1L trial." Popat, S., H. R. Kim, M. J. Ahn, J. CH Yang, J. Y. Han, M. J. Hochmair, K. H. Lee et al. Annals of Oncology 29, no. suppl_8 (2018): mdy424-070.
  3. "P06 Competing CNS or Systemic Progression Analysis for EGFR Mutation-Positive NSCLC Patients on Afatinib in LUX-Lung 3, 6, and 7."Wu, Y., V. Hirsh, K. O’Byrne, N. Yamamoto, S. Popat, A. Tamiya, D. Kaen, A. Märten, and M. Schuler. Journal of Thoracic Oncology 13, no. 9 (2018): S163.
  4. "Carbon Supports Mitigate Resistivity Limitations in Ni–Mo Alkaline Hydrogen Evolution Electrocatalysts," Rituja B. Patil, Aayush Mantri, Stephen D. House, Judith C. Yang, and James R. McKoneChemRxiv (2018)
  5. "Ensemble vs. Local Restructuring of Core-shell Nickel-Cobalt Nanoparticles upon Oxidation and Reduction Cycles, Sophie Carenco, Cecile S. Bonifacio, Judith C. Yang,Chem. Eur. J. (2018)

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