کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9594487 | 1507963 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Atomic structure of the 6H-SiC(0Â 0Â 0Â 1) nanomesh
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The atomic structure of the carbon nanomesh template (the so-called 63Ã63R30° reconstruction) on the 6H-SiC(0 0 0 1) surface was investigated in detail by scanning tunneling microscopy (STM), low energy electron diffraction (LEED), synchrotron photoemission spectroscopy (PES) and density-functional theory (DFT) calculations. We propose that the origin of the carbon nanomesh template arises from the self-organization of excess carbon atoms forming a novel honeycomb arrangement atop the 6H-SiC(0 0 0 1) surface after annealing at 1100 °C. Two carbon nanomesh-related C 1s components are observed at binding energies of 285.1 eV (S1) and 283.8 eV (S2) by angle-resolved synchrotron PES experiments. We assign the S2 component to carbon atoms that bond to one underlying Si atom, and the S1 component to carbon atoms bonded to other carbon atoms without Si-C bond formation. Further annealing results in the formation of crystalline graphitic layers on top of the surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 596, Issues 1â3, 10 December 2005, Pages 176-186
Journal: Surface Science - Volume 596, Issues 1â3, 10 December 2005, Pages 176-186
نویسندگان
Wei Chen, Hai Xu, Lei Liu, Xingyu Gao, Dongchen Qi, Guowen Peng, Swee Ching Tan, Yuanping Feng, Kian Ping Loh, Andrew Thye Shen Wee,