Large Scale Fabrication of Periodical Bowl-like Micropatterns of Single Crystal ZnO
Ding Lan, Yuren Wang, Xiaolong Du, Zengxia Mei, Qikun Xue, Ke Wang,§ Xiaodong Han, and Ze ZhangNational Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China, Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100022, China, and National Center of Electron Microscope, Beijing, 100080, China
Received December 25, 2007
Revised May 21, 2008
Abstract: Nanostructured ZnO materials are of great significance for their potential applications in photoelectronic devices, light-emitting displays, catalysis and gas sensors. In this paper, we report a new method to produce large area periodical bowl-like micropatterns of single crystal ZnO through aqueous-phase epitaxial growth on a ZnO single crystal substrate. A self-assembled monolayer of polystyrene microspheres was used as a template to confine the epitaxial growth of single crystal ZnO from the substrate, while the growth morphology was well controlled by citrate anions. Moreover, it was found that the self-assembled monolayer of colloidal spheres plays an important role in reduction of the defect density in the epitaxial ZnO layer. Though the mechanism is still open for further investigation, the present result indicates a new route to suppress the dislocations in the fabrication of single crystal ZnO film. A predicable application of this new method is for the fabrication of two-dimensional photonic crystal structures on light emitting diode surfaces.
[url]http://pubs.acs.org/cgi-bin/abstract.cgi/cgdefu/asap/abs/cg7012683.html[/url] 恭喜 Congratulations! :victory: Con! 祝贺楼主 恭喜楼主 Congratulations:lol
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