Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 14    No. 5    October 2004

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ZnO nanoneedles fabricated by a simple approach and their optical properties
LU Qing-feng(路庆凤)1, WEI Hong-xiang(魏红祥)1, 2, 
HU Zhu-dong(胡柱东)2

1. College of Physics & Information Engineering,
  Henan Normal University, Xinxiang 453007, China;
2. Institute of Physics, Chinese Academy of Sciences, 
Beijing 100080, China

Abstract:Spoke-like ZnO nanoneedles have been successfully synthesized at the ambient pressure through thermally oxidizing Zn powders containing Au nanoparticles. X-ray diffraction analysis indicates that the ZnO nanoneedles have a hexagonal wurtzite structure of the crystalline ZnO. The morphology of the products was examined by FE-SEM. The photoluminescence(PL) spectrum under 325 nm exhibits both an UV emission and a green emission. It is interesting to note that the heating rate plays a key role in the synthesis of ZnO nanoneedles. Based on this discovery we propose to explain the special growth behavior as novel mechanism that a large temperature gradient and Au nanoparticles simultaneously result in the spoke-like ZnO nanoneedles growth.


Key words: ZnO nanoneedles; photoluminescence spectrum; optical properties

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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