Nonlinear responses of electronic-excitation-induced phase transformations in GaSb nanoparticles |
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Authors: | Yasuda H Mori H Lee J G |
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Institution: | Department of Mechanical Engineering, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan. yasuda@mech.kobe-u.ac.jp |
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Abstract: | We studied electronic-excitation-induced phase transformations in nanoparticles using transmission electron microscopy. GaSb particles excited by 75 keV electrons transform to two phases consisting of an antimony core and a gallium shell or an amorphous phase, or remain in the original crystalline phase, depending on particle size and/or temperature. It is suggested that such nonlinear responses of the phase transformations may arise from synergistic effects of bond instability, localized excitations, enhanced diffusivity, or thermal equilibrium in reactions. |
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