کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5426790 1395906 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impact of surface phase transitions and structure on surface diffusion profiles of Pb and Bi over Cu(1 0 0)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Impact of surface phase transitions and structure on surface diffusion profiles of Pb and Bi over Cu(1 0 0)
چکیده انگلیسی

Surface diffusion of Pb and Bi over Cu(1 0 0) surfaces has been studied by scanning Auger microscopy techniques. The diffusion profiles of Pb and Bi have been found to be quite different. The results show that three major factors control the shapes of the surface diffusion profiles: (a) First order phase transitions, which lead to phase coexistence over specified coverage ranges, tend to produce abrupt changes in coverage versus distance profiles; (b) profiles can be affected by the existence of significant differences in the diffusion coefficients of the various phases present, and by the possibility (c) of important changes in diffusivity within a given phase, as a function of coverage, due to interactions between the diffusing atoms. In addition, it has been shown that the strong connection between diffusion profile shapes and the 2D phase diagram allows certain features of the 2D phase diagram to be determined from diffusion profiles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 600, Issue 6, 15 March 2006, Pages 1265-1276
نویسندگان
, , ,