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Hydrothermal Synthesis and Field Enhancement Behavior of ZnO Nanorods Pattern
Authors:Jing Tang  Lin Du  Wen-hui Pang  Jing-jing Zheng  Xiao-chun Tian  Jin-liang Zhuang
Institution:1.Key Laboratory of Analysis and Detection Technology for Food Safety, Ministry of Education and Fujian Province, Fuzhou 350000, China2.Institute of Inorganic and analytical Chemistry, University of Frankfurt, Frankfurt 60325, Germany
Abstract:We provide a new way to prepare ZnO nanorods pattern from the solution composed of hexamethylenetetramine (HMT) and Zn(NO3)2. The substrate is ITO substrate covered by well ordered Au islands. Since Au and the underneath ITO substrate have two different nucleation rates in the initial stage of heterogeneous nucleation process, the subsequent ZnO growth on the quick nucleating area takes place under diffusion control and is able to confine the synthesis of ZnO nanorods to specific locations. The concentrations of zinc nitrate and HMT are well adjusted to show the possibility of the new route for the patterning of the ZnO nanorods. Furthermore, the nanorods pattern was characterized by X-ray diffraction and photoluminescence and the performance of field emission property from ZnO nanorod patterns was investigated. The ZnO nanorods pattern with a good alignment also shows a good field enhancement behavior with a high value of the field enhancement factor.
Keywords:Heterogeneous nucleation  ZnO nanorods pattern  Selective growth  Field enhancement
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