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Nuclear Engineering and Radiological Sciences > People > Faculty > Core Faculty > Fei Gao

Fei Gao

Professor, Nuclear Engineering and Radiological Sciences

NERS

2943 Cooley Bldg

gaofeium@umich.edu

(734) 615-0697

Education Research Interests Awards Publications

Education:

University of Liverpool, UK
Ph.D. Materials Science ’95

Lanzhou University, China
M.S. Condensed Matter Physics ’87

Lanzhou University, China
B.S. Physics ’83

Research Interests: ^top

  • Fundamental understanding of ion-solid interaction and radiation effects in ceramics and reactor materials, interfacial and nanostructure evolution of semiconductors, radiation detector materials, and development and application of multi-scale computer simulation for materials modeling.
  • Multi-scale computer simulations of microstructure evolution of solids under irradiation employing various computational methods, including density functional theory (DFT), ab initio molecular dynamics, time-dependent DFT, and tight-binding calculations, molecular dynamics simulations, long-time dynamics, kinetic Monte Carlo, and cluster dynamics.
  • Degradation of spent nuclear fuel canisters
  • Swift heavy ion damage in materials
  • Ceramics for nuclear waste forms, fuels and fusion reactor applications
  • Radiation response and signal generation in detector materials

Development of high performance ODS alloys

The research employs coordinated experiments to study swelling, radiation hardening and changes in mechanical properties not only of these ODS alloys, but also further-optimized ODS candidates resulting from these first-round studies. The project will identify key factors influencing radiation tolerance of new ODS alloys for further property optimization. To gain atomic scale understanding, the research integrates these experiments with modeling capabilities, including molecular dynamics and dislocation dynamics simulations to understand the roles of yttria and other dispersoids as well as their various dispersion modes on both microstructural changes and mechanical property changes.

Atomistic- and Meso-Scale Computational Simulations for Developing Multi-Timescale Theory for Radiation Degradation in Electronic and Optoelectronic Devices

The research is to simulate atomistic- and meso-scale behavior of defect evolutions in compound semiconductors, including ultrafast displacement cascade, intermediate defect stabilization and cluster formation, as well as slow defect reaction and migration. The fundamental mechanisms and knowledge gained from atomic- and meso-scale simulations will be input into rate-diffusion theory as initial conditions to calculate the steady-state distribution of point defects in a mesoscopic layered-structured system, thus allowing the development of a multi-timescale theory to study radiation degradation in electronic and optoelectronic devices. The long‑term goal is developing a fundamental understanding of defects and defect processes in compound semiconductors, including defect/property relationships, the effects of defects on transport processes, the aggregation of defects to form complex nanostructures, and the development of predictive models of behavior.

Computational Capability for Studying Pulse Shape Discrimination of Scintillator Materials

The research collaborates with the researchers at Pacific Northwest National Laboratory to identify and understand the elementary processes that give rise to the measurable performance characteristics of scintillator materials. Through the development of a firm theoretical understanding of scintillator physics, the research will provide a pathway to optimize current scintillators and lead to the science-driven candidate search for new scintillator materials. The application of these capabilities to predict the pulse shape discrimination capability of scintillator materials will be explored.

Awards: ^top

  • Selected FZD (Forschungs zentrum Dresden-Rossendorf) Fellow, Institute of Ion Beam
  • Physics and Materials Research, Forschungs Zentrum Rossendorf, Germany (2008-2009)
  • Outstanding Research Award of Basic Energy Science, U.S. Department of Energy (2004)
  • Outstanding Performance Awards, Pacific Northwest National Laboratory (2001-2003)
  • Research Student Award, CVCP, UK (1992)
  • Research Scholarship, Sino-British Friendship Scholarship Scheme, UK (1991)

PROFESSIONAL EXPERIENCE

  • 2014-present: Professor, University of Michigan, Nuclear Engineering & Radiological Sciences
  • 2010-2014: Adjunct Professor, Washington State University
  • 2008-2014: Chief Scientist, Pacific Northwest National Laboratory
  • 2004-2008: Senior Research Scientist IV, Pacific Northwest National Laboratory
  • 2001-2003: Senior Research Scientist III, Pacific Northwest National Laboratory
  • 2000-2001: Research Scientist, Pacific Northwest National Laboratory
  • 1997-1999: Senior Research Fellow, University of Liverpool, UK, Materials Science and Engineering
  • 1994-1997: Research Associate, University of Liverpool, UK
  • 1991-1994: Research Assistant (PhD study), University of Liverpool, UK
  • 1987-1990: Lecturer, Lanzhou University, China

OTHER PROFESSIONAL ACTIVITIES

  • International Committee for Computer Simulations of Radiation Effects in Solids
  • Program Committee: SPIE Hard X-Ray, Gamma-Ray, and Neutron Detector Physics
  • General Secretariat, 16th International Conference on Fusion Reactor Materials
  • Guest Senior Scientist, Institute of Ion Beam Physics and Materials Research, Forschungs Zentrum Rossendorf, Germany, 2002-2007
  • Guest Professor, University of Electronic Science and Technology, China
  • Honor Professor, University of Liverpool, UK
  • Academic Editor, American Institute of Physics Advances (2010-2013); Editorial Board, Dataset Papers in Physics, Atomic and Molecular Physics (2011-present) and Conference Papers in Physics (2012-present)

Publications: ^top

  1. Bang JY, S Meng, YY Sun , D West , ZG Wang , F Gao , and SB Zhang, “Regulating Energy Transfer of Excited Carriers: The Case for Excitation Induced Hydrogen Dissociation on Hydrogenated Graphene”, Proceedings of the National Academy of Science of the United States of America (PNAS) 110(2013)908.
  2. Wang Z*, M Gu, Y Zhou, X Zu, JG Connell, J Xiao, DE Perea, LJ Lauhon, J Bang, S Zhang, CM Wang*, and F Gao*, “Electron-Rich Driven Electrochemical Solid-State Amorphization in Li-Si Alloys” Nano Letters 13(2013)4511.
  3. Gu M, Z Wang, JG Connell, DE Perea, LJ Lauhon, F Gao, and CM Wang, “Electronic Origin For The Phase Transition From Amorphous LixSi To Crystalline Li15Si4 ” ACS Nano 7(2013)6303.
  4. Bang J, Z Wang, F Gao, S Meng, and S Zhang, “Suppression of nonradiative recombination in ionic insulators by defects: Role of fast electron trapping in Tl-doped CsI.” Physical Review B 87(2013)205206.
  5. Wang CD, YG Zhou, LF He, TW Ng, G Hong, QH Wu, F Gao, A Lee, and AP Zhang, “In situ nitrogen-doped graphene grown from polydimethylsiloxane by plasma enhanced chemical vapor deposition”, Nanoscale 5(2013)600.
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