ADSORPTION OF ETHYLENE ON THE SI(100)-(2X1) SURFACE

被引：49
作者：
HUANG, C
WIDDRA, W
WEINBERG, WH
机构：
[1] UNIV CALIF SANTA BARBARA,DEPT CHEM ENGN,SANTA BARBARA,CA 93106
[2] UNIV CALIF SANTA BARBARA,CTR QUANTIZED ELECTR STRUCT,SANTA BARBARA,CA 93106
来源：
SURFACE SCIENCE | 1994年 / 315卷 / 1-2期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/0039-6028(94)90524-X
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The adsorption of ethylene on Si(100)-(2 x 1) has been studied using high-resolution electron energy loss spectroscopy. Upon adsorption, the ethylene molecule rehybridizes from sp2 to sp3 and forms a di-sigma bonded structure to the surface. However, the bonding of the surface silicon atoms - whether or not the Si-Si dimer bond remains - cannot be derived from just a study of ethylene adsorption. With low exposures of atomic hydrogen on the ethylene-saturated Si(100) surface, we observed an additional Si-H vibrational mode and no significant change in the chemisorbed ethylene spectrum. This result leads to the conclusion that the surface dangling bonds still exist after ethylene adsorption, and they are accessible to atomic hydrogen. Consequently, the adsorption of ethylene must be accompanied by cleavage of the original Si-Si dimer bonds on the surface.
引用
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页码：L953 / L958
页数：6
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