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Low temperature growth and characterization of ZnO nanostructures

发布时间: 2008-05-14 00:00 | 【 【打印】【关闭】
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 Low temperature growth and characterization of ZnO nanostructures
 
 
Speaker:
Dr. Jingbiao Cui
Department of Physics and Astronomy
University of Arkansas at Little Rock
 
时间:2008516 (星期五)上午1000
  点:2号楼607会议室
 

Zinc oxide (ZnO) is an important direct- and wide-bandgap (3.37 eV) semiconductor and is of great interest for low-voltage and short-wavelength (ultraviolet/blue) electro-optical devices. Although high quality ZnO nanostructures have been obtained using both catalytically activated vapor phase processes at high temperature and hydrothermal growth at low temperature, controlled growth of ZnO is still a challenge. We recently developed a low temperature process to grow ZnO nanowire arrays using an electrochemical approach, which enhances the growth rate and nucleation density and shows potential for ZnO doping with different dopant materials such as transition metals. We demonstrated that individual ZnO nanowires with diameters around 100 nm could be precisely placed in desired locations to form two-dimensional periodic ordered structures. The highly ordered structures with a photonic bandgap in the visible region were fabricated by a combination of soft templates created by electron beam lithography and the electrochemical process. This approach is compatible with current micro-fabrication techniques and promising for large-scale production of ZnO nanostructures for optical and electronic applications. 

Dr Jingbiao Cui is Assistant Professor in Department of Physics and Astronomy,University of Arkansas at Little Rock. His research interests are synthesis of semiconducting nanostructures, their structural and physical properties including electrical, optical and magnetic properties, and potential applications in electronic and optoelectronic devices. He has published many articles in international journals, such as Nano Lett., Appl. Phys. Lett., Phys. Rev. Lett., etc.

 
联系人:曾宇平  研究员 
            朱英杰  研究员