کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9567031 | 1388382 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Bi induced step-flow growth in the homoepitaxial growth of Au(1Â 1Â 1)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
Homoepitaxial growth of Au on Bi-covered Au(1 1 1) was studied at room temperature using reflection high-energy electron diffraction (RHEED) and Auger electron spectroscopy (AES). From observations of RHEED it is found that the Au(1 1 1) (23 Ã 1) reconstruction structure changes to a (1 Ã 1) by about 0.16-0.5 ML deposition of Bi and to a (2â3 Ã 2â3)R30° by about 1.0 ML deposition of Bi, respectively. The surface morphology evolution by Bi deposition leads to a change of Au homoepitaxial growth behavior from layer-by-layer to step flow. This indicates that the surface diffusion distance of Au atoms on the Bi-precovered (1 Ã 1) and (2â3 Ã 2â3)R30° surfaces is longer than that on the Au(1 1 1) (23 Ã 1) clean surfaces. A strong surface segregation of Bi was found at top of surface. It is concluded that Bi atoms acted as an effective surfactant in the Au homoepitaxial growth by promoting Au intralayer mass transport.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 252, Issue 2, 15 October 2005, Pages 364-371
Journal: Applied Surface Science - Volume 252, Issue 2, 15 October 2005, Pages 364-371
نویسندگان
M. Kamiko, H. Mizuno, H. Chihaya, J.-H. Xu, I. Kojima, R. Yamamoto,