期刊
ACTA MATERIALIA
卷 83, 期 -, 页码 91-101出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2014.09.049
关键词
Thin films; Interface diffusion; Surface energy anisotropy; Grain boundaries; Solid-state dewetting
资金
- Israel Science Foundation [775/10]
- Russell Berry Nanotechnology Institute at the Technion
We studied the initial stages of solid-state dewetting of thin nanocrystalline Au films deposited on sapphire substrates during annealing in air and in the flow of forming gas. The interrupted annealing technique was employed to study the evolution of the size and morphology of individual holes in the film. The holes exhibited comparable expansion rates and similar topographies comprising an elevated rim in both annealing atmospheres. In particular, we observed a terraced topography of the hole rim with sharp steps associated with individual grain boundaries. The holes in the film annealed in air exhibited more branched, tortuous lateral morphology than their counterparts in the film annealed in forming gas. We interpreted these experimental finding in terms of the effect of annealing atmosphere on the surface anisotropy of Au. We developed dewetting models which consider Au self-diffusion along the Au-sapphire interface as a factor controlling the kinetics of the dewetting process. The predictions of our models are in a good agreement with experimental findings. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据