Direct Observation of Sublimation Behaviors in One-Dimensional In2Se3/In2O3 Nanoheterostructures.
Recently, in situ transmission electron microscopy (TEM) has provided a route to analyze structural characterization and chemical evolution with its powerful and unique applications. In this paper, we disclose the detailed phenomenon of sublimation on the atomic scale. In2Se3/In2O3 nanowires were synthesized via the vapor-liquid-solid mechanism and studied in an ultra-high-vacuum (UHV) TEM at high temperature in real time. During in situ observation of the sublimation process of the nanowires, the evolution and reconstruction of the exposed In2Se3 surface progressed in different manners with time. The surface structure was decomposed by mass-desorption and stepwise-migration processes, which are also energetically favored processes in the ab initio calculation. This study developed a new concept and will be essential in the development of atomic kinetics.
†Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu City, 300 Taiwan.|‡Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu City, 30013 Taiwan.|§Department of Electrical Engineering, National Central University, Taoyuan City, 32001 Taiwan.
Cheng-Lun
CL
Hsin
†Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu City, 300 Taiwan.
Chun-Wei
CW
Huang
†Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu City, 300 Taiwan.
Jui-Yuan
JY
Chen
∥Graduate Institute of Precision Engineering, National Chung Hsing University, Taichung City, 402 Taiwan.
Kuo-Cheng
KC
Liao
∥Graduate Institute of Precision Engineering, National Chung Hsing University, Taichung City, 402 Taiwan.|⊥Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
Po-Liang
PL
Liu
†Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu City, 300 Taiwan.
Wen-Wei
WW
Wu
‡Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu City, 30013 Taiwan.
Lih-Juann
LJ
Chen