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Pure Appl. Chem., 2010, Vol. 82, No. 8, pp. 1673-1689

Published online 2010-05-14

Semiconductor nanostructures via electrodeposition from ionic liquids

Rihab Al-Salman1, Xiangdong Meng2, Jiupeng Zhao3, Yao Li2, Ulrich Kynast4, Marina M. Lezhnina4 and Frank Endres1*

1 Institute of Particle Technology, Clausthal University of Technology, D-38678 Clausthal-Zellerfeld, Germany
2 Center for Composite Materials and Structure, Harbin Institute of Technology, Harbin, 150001, China
3 School of Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
4 Department of Chemical Engineering, Inorganic Chemistry/Applied Materials Science, University of Applied Sciences, Münster, Germany

Abstract: The fascinating properties of ionic liquids make it possible to synthesize semiconductor nanostructures via a simple and low-cost electrochemical pathway. The present paper summarizes our recent work on the synthesis of Si, Ge, and SixGe1–x nanostructures from ionic liquids: thin films, nanowires and photonic crystals. We also introduce our first results on the template-assisted electrodeposition of SixGe1–x photonic crystals from 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide ([EMIm]Tf2N) ionic liquid, and some optical measurements on the previously prepared Ge photonic crystals. Our results confirm that electrochemistry in ionic liquids is excellently suited to the synthesis of high-quality semiconductor nanostructures.