Electrochemical Preparation of Cadmium Selenide Nanoparticles by the Use of Molecular Templates
- 1 January 2001
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 148 (9), C569-C573
- https://doi.org/10.1149/1.1385848
Abstract
We report the electrochemical preparation of cadmium selenide nanoparticles at gold electrodes modified with molecular templates. The molecular templates were obtained by properly arranging thiolated β-cyclodextrin self-assembled monolayers (SAMs) on gold electrodes. Selenium was first deposited on a SAM-modified gold electrode at an appropriate potential, followed by reduction to HSe−HSe− in a solution containing Cd2+,Cd2+, leading to the deposition of CdSe. The Cd codeposited at the time of CdSe deposition was removed by anodic dissolution at a potential where it was oxidized. Scanning electron microscopic pictures showed that Se0Se0 and cadmium selenide particles of smaller than 60 and 150 nm diam, respectively, were deposited on the SAM-modified gold electrodes. Selenium particles of as small as 1-2 nm diam and ∼0.2 nm height were observed by in situ electrochemical scanning tunneling microscopy experiments during the early stages of electrochemical deposition. © 2001 The Electrochemical Society. All rights reserved.Keywords
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