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Synthesis of dumbbell-like ZnO microcrystals via a simple solution route

Zhenqing Hou1, Yixiao Wang1, Lihua Shen1, Hao Guo1, Gongxin Wang1, Yang Li1, Shuifan Zhou1, Qiqing Zhang2* and Qian Jiang3*

Author Affiliations

1 Research Center of Biomedical Engineering, Department of Biomaterials, College of Materials, Xiamen University, The Key Laboratory of Biomedical Engineering of Fujian Province, Research Center of Biomedical Engineering and Technology of Xiamen City, Xiamen, Fujian 361005, PR China

2 Air Force General Hospital, 343 PLA, Beijing 100142, China

3 Institute of Biomedical Engineering, Chinese Academy of Medical Science, Peking Union Medical College, The Key Laboratory of Biomaterial Material of Tianjin, Tianjin 300192, PR China

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Nanoscale Research Letters 2012, 7:507  doi:10.1186/1556-276X-7-507

Published: 11 September 2012

Abstract

Uniform dumbbell-like ZnO microcrystals had been successfully fabricated on a large scale via a facile solution technique under mild conditions. Obtained ZnO, with length of 1.2 to 1.6 μm and diameters of 350 to 600 nm, exhibited well-defined dumbbell-like morphology and hexagonal wurtzite structure and grew along the [001] direction. Effects of the reactant concentration on the sizes and morphologies of the ZnO products had been investigated, indicating that the reactant concentration played a crucial role in determining final sizes and shapes of the samples. In addition, the growth process of the dumbbell-like ZnO microcrystals was studied, and a possible formation mechanism was proposed. Furthermore, the optical properties of ZnO samples obtained at various reaction times were also investigated by photoluminescence (PL) spectroscopy. The PL spectra of the as-prepared dumbbell-like ZnO microcrystals showed a strong UV emission peak.

Keywords:
ZnO; Dumbbell-like; Micro-rods; Solution route