Electrochemical and Electrical Behavior of (111)-Oriented Si Surfaces Alkoxylated through Oxidative Activation of Si−H Bonds
Abstract
The reaction chemistry of H-terminated (111)-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.
Additional Information
© 2000 American Chemical Society. Received: May 15, 2000; In Final Form: June 26, 2000. Publication Date (Web): October 11, 2000. We acknowledge the National Science Foundation, grant CHE-9974562, for support of this work.Additional details
- Eprint ID
- 71397
- DOI
- 10.1021/jp001791u
- Resolver ID
- CaltechAUTHORS:20161024-135059333
- NSF
- CHE-9974562
- Created
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2016-10-24Created from EPrint's datestamp field
- Updated
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2021-11-11Created from EPrint's last_modified field