Electrochemical and electrical behavior of (111)-oriented Si surfaces alkoxylated through oxidative activation of Si-H bonds

被引：46

作者：

Haber, JA ^{[1
]}

Lauermann, I ^{[1
]}

Michalak, D ^{[1
]}

Vaid, TP ^{[1
]}

Lewis, NS ^{[1
]}

机构：

[1] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 43期

关键词：

D O I：

10.1021/jp001791u

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 reaction chemistry of H-terminated (Ill)-oriented Si surfaces has been explored in the presence of one-electron oxidants in alcohol solvents. Similar chemistry was observed for Si surfaces exposed to methanolic solutions of ferrocenium tetrafluoroborate or to methanolic solutions of I-2, as well as for Si electrodes that were subjected to anodic electrochemical oxidation processes in methanol. Oxidation in alcohols activates the surficial Si-H bond toward nucleophilic attack, producing alkoxylated surfaces. This mechanism for Si-H activation is supported by infrared spectroscopy, temperature-programmed desorption spectroscopy, and by X-ray photoelectron spectroscopic studies of this system. These data explain a variety of observations regarding the surface chemistry and electrochemistry of Si electrodes and surfaces.

引用

页码：9947 / 9950

页数：4

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