In situ TEM observation of synergistic electronic-excitation-effects of phase stability in III-V binary compound nanoparticles
Department of Mechanical Engineering, Kobe University, Rokkodai, Nada, Kobe, 657-8501, Japan
2 Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, Yamadaoka, Suita, Osaka, 565-0871, Japan
Corresponding author: a email@example.com
Published online: 24 May 2007
Electronic-excitation-effects of phase stability in III-V binary compound nanoparticles have been studied by TEM. When GaSb particles were excited by 75 keV electrons, the compound transforms to a two-phase consisting of an antimony core and a gallium shell or an amorphous phase, or remains the original crystalline phase, depending on particle size and/or temperature. It is suggested that such nonlinear responses of the phase stability may arise from synergistic effects of bond instability under excited states, formation of high density of excited states, chemical equilibrium under excited states and temperature dependence of defects mobility.
PACS: 61.80.-x – Physical radiation effects, radiation damage / 81.30.-t – Phase diagrams and microstructures developed by solidification and solid-solid phase transformations / 64.75.+g – Solubility, segregation, and mixing; phase separation
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007