DIRECT DETERMINATION OF ABSOLUTE MONOLAYER COVERAGES OF CHEMISORBED C2H2 AND C2H4 ON SI(100)

被引：149

作者：

CHENG, CC

WALLACE, RM

TAYLOR, PA

CHOYKE, WJ

YATES, JT

机构：

[1] Surface Science Center, Department of Chemistry, University of Pittsburgh, Pittsburgh

来源：

JOURNAL OF APPLIED PHYSICS | 1990年 / 67卷 / 08期

关键词：

D O I：

10.1063/1.345326

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A convenient kinetic uptake method has been employed to determine the absolute saturation monolayer coverage of C2H2 and C 2H4 on a Si(100)(2×1) surface. Such measurements are important for postulating the structure of the chemisorbed hydrocarbon species on this surface. The saturation surface coverage for both chemisorbed molecules at 105 K is 2.5(±0.2)×1014 molecules/cm 2. This number is consistent with 1 hydrocarbon molecule per Si dimer site at monolayer coverage when the role of surface defects on Si(100) is considered. A di-σ bonding model for both molecules is proposed at saturation coverage.

引用

页码：3693 / 3699

页数：7

共 23 条

[1]

ALBERT MR, 1987, SURFACE SCI GUIDE OR, P194

[2] SI(100) SURFACE RECONSTRUCTION - SPECTROSCOPIC SELECTION OF A STRUCTURAL MODEL [J].