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Published on: March 15, 2015
Small size yet big action: a simple sulfate anion templated a discrete 78-nuclearity silver sulfur nanocluster with a
Li-Ping Cheng1, Zhi Wang2, Qiao-Yu Wu1
1Key Laboratory of Environmental Friendly Function Materials, Ministry of Education, College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China. ggluo@hqu.edu.cn.
Abstract:
A discrete 78-nucleus silver-sulfur nanocluster with a sulfate-centered multishell structure was isolated and characterized. Its crystal structure revealed 18 and 60 Ag atoms in the inner and outer shell, respectively. The inner shell of 18-nuclearity Ag atoms is a very rare convex polyhedron featuring an elongated triangular orthobicupola. The incorporation of a sulfate anion and multishell arrangement in the nanocluster led to a dramatic decrease in the band gap (Eg = 1.40 eV). Our study showed that simple anions can also induce the formation of high-nuclearity silver clusters with excellent optical properties.
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