Formation of Uniform CuO Nanorods by Spontaneous Aggregation:  Selective Synthesis of CuO, Cu2O, and Cu Nanoparticles by a Solid−Liquid Phase Arc Discharge Process

Wei-Tang Yao,† Shu-Hong Yu,*† Yong Zhou,‡ Jun Jiang,† Qing-Song Wu,† Lin Zhang,† and Jie Jiang†
Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Structural Research Laboratory of the Chinese Academy of Sciences and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, People's Republic of China, and Nanoarchitectonics Research Center, Advanced Industrial Science and Technology, Tsukuba Center 5, 1-1-1 Higashi, Tsukuba, Japan
J. Phys. Chem. B, 2005, 109 (29), pp 14011–14016
DOI: 10.1021/jp0517605
Publication Date (Web): July 1, 2005
Copyright © 2005 American Chemical Society
†

 University of Science and Technology of China.

,
*

 Author to whom correspondence should be addressed. Fax:  + 86 551 3603040. E-mail:  shyu@ustc.edu.cn.

,
‡

 Advanced Industrial Science and Technology.

Abstract

Uniform and monodisperse CuO nanorods have been synthesized by directional aggregation and crystallization of tiny CuO nanoparticles generated from a solid−liquid arc discharge process under ambient conditions in the absence of any surfactants. Uniform CuO nanorods with sharp ends are formed from tiny nanoparticles via a process that involves the rapid oxidation of Cu nanoclusters, the spontaneous aggregation of CuO nanoparticles, and the Ostawald ripening process. The spontaneous aggregation and oriented attachment of tiny CuO nanoparticles contributed obviously to the formation of these kinds of nanostructures. By choice of suitable reducing agent to prevent the oxidation of Cu nanoclusters, Cu and Cu2O nanoparticles can be selectively synthesized.

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History

  • Published In Issue July 28, 2005
  • Received April 6, 2005
    Revised May 26, 2005

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