頁籤選單縮合
| 題 名 | Possible Motion of an H-Atom on Cu(100) Surface |
|---|---|
| 作 者 | Wen,Yuan-hann; | 書刊名 | Chinese Journal of Physics |
| 卷 期 | 37:6 1999.12[民88.12] |
| 頁 次 | 頁608-622 |
| 分類號 | 333.32 |
| 關鍵詞 | |
| 語 文 | 英文(English) |
| 英文摘要 | We compute different adsorption forms for different surface sites, at top, at saddle points (at bridges), and in four-fold (hollow) positions. Then we show that this type of physics is closely related to continuum mechanics, apart from surface chemistry. We use a two-body potential as our basis for the calculation of the potential of the gas particle produced by the surface sites. This potential is taken as a combination of a simple harmonic potential and the Lennard-Jones potential, and is established in particular for the H/Cu(100) surface. It includes the chemisorption and physisorption processes simultaneously. In this paper, we have calculated the static surface potential Vs(r) of H/Cu(100) as an exemplary adatom-surface system by pair-wise additivity. The calculations give good results and offer a very realistic interpretation. From these results, we assume that the surface formed by Cu provides a source for the ad-H-atoms for some elastic or plastic deformation under forces. Under this consideration, the elastic or plastic deformation is related to the second derivatives of ``the surface potential tensor function'' parallel to the surface direction and perpendicular to the surface direction. Pictorially, we can thus predict the behavior of an H-atom at a sticking equilibrium position on a Cu(100) surface. |
本系統中英文摘要資訊取自各篇刊載內容。