Acoustic Enhancement of Surface Diffusion
Acoustic Enhancement of Surface Diffusion
复制标题
表面扩散的声学增强
DOI:
10.1021/jp400884d
复制
发表时间:
2013
影响因子:
3.7
通讯作者:
L. Zhigilei
中科院分区:
文献类型:
--
作者:
Chengping Wu;V. Zaitsev;L. Zhigilei
The idea of acoustic activation of surface diffusion is explored theoretically and in atomistic simulations. It is found that a substantial diffusion enhancement by surface acoustic waves is possible via (1) transient surface strain-induced modification of the diffusion barriers, (2) adiabatic variation in the surface temperature, and (3) dynamic coupling of the acoustic waves with vibrational states of adsorbed species. The approximate scaling laws describing the first two effects are established and verified in kinetic Monte Carlo simulations. The combined contribution of all three effects is studied in molecular dynamics simulations, and the conditions for the diffusion activation through the dynamic coupling are elucidated. The acoustic enhancement of surface diffusion provides an attractive alternative to thermal activation in thin film growth on heat-sensitive substrates.
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
野々村拓;小嶋亮次;福本浩章;大山聖;藤井孝蔵;井上泰宣
通讯作者:
井上泰宣