کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5423168 | 1507952 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ag on Mo(110) studied by AES and STM
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کلمات کلیدی
Metal–metal interfaces - رابط های فلزی فلزیGrowth - رشدThin film growth - رشد نازک فیلمLow index single crystal surfaces - سطوح منفرد کریستال پایینAuger Electron Spectroscopy (AES) - طیف الکترونی آئور (AES)Molybdenum - مولیبدنومScanning tunnelling microscopy (STM) - میکروسکوپ تونل زنی اسکن (STM)Silver - نقره
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Auger electron spectroscopy (AES) and scanning tunnelling microscopy (STM) have been used to investigate the growth behaviour of ultra-thin Ag films on a Mo(110) surface at room temperature. An analysis of AES and STM measurements indicates that three-dimensional (3D) growth of a Ag film is observed. For submonolayer coverage, the growth of Ag is mediated by a two-dimensional step-flow mechanism. During the initial stage of this growth, the first Ag layer nucleates and creates islands (average size of islands is about 180 ± 20 nm2) at Mo step edges. In the monolayer coverage range, the decoration of substrate steps by Ag can be distinguished by the presence of a fractional step of p1 = 0.86 ± 0.6 Ã
height at the Ag-Mo boundary. As the sample is post-annealed to 700 K, the morphology of the surface changes. Step-flow growth in this case gives rise to a regular Ag nanostripe network attached to Mo(110) step edges. The corrugation profiles reveal the protrusion of silver nanostripes of thicknesses p1 = 0.98 ± 0.16 Ã
and p2 = 0.39 ± 0.06 Ã
for submonolayer and monolayer coverage ranges, respectively, above each single step of a Mo terrace morphology.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 604, Issues 13â14, 15 July 2010, Pages 1179-1184
Journal: Surface Science - Volume 604, Issues 13â14, 15 July 2010, Pages 1179-1184
نویسندگان
A. Krupski,