کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7880895 1509593 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanisms of solid-state dewetting of thin Au films in different annealing atmospheres
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Mechanisms of solid-state dewetting of thin Au films in different annealing atmospheres
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 83, 15 January 2015, Pages 91-101
نویسندگان
, , , ,