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Báo cáo hóa học: "Solution Grown Se/Te Nanowires: Nucleation, Evolution, and The Role of Triganol Te seeds"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Solution Grown Se/Te Nanowires: Nucleation, Evolution, and The Role of Triganol Te seeds | Nanoscale Res Lett 2009 4 963-970 DOI 10.1007 S11671-009-9346-2 NANO EXPRESS Solution Grown Se Te Nanowires Nucleation Evolution and The Role of Triganol Te seeds Hong Tao Xudong Shan Dapeng Yu Hongmei Liu Donghuan Qin Yong Cao Received 23 March 2009 Accepted 6 May 2009 Published online 19 May 2009 to the authors 2009 Abstract We have studied the nucleation and growth of Se-Te nanowires NWs with different morphologies grown by a chemical solution process. Through systematic characterization of the Se-Te NW morphology as a function of the Te nanocrystallines NCs precursor the relative ratio between Se and Te and the growth time a number of significant insights into Se-Te NW growth by chemical solution processes have been developed. Specifically we have found that i the growth of Se-Te NWs can be initiated from either long or short triganol Te nanorods ii the frequency of proximal interactions between nanorod tips and the competition between Se and Te at the end of short Te nanorods results in V-shaped structures of Se-Te NWs the ratio between Se and Te having great effect on the morphology of Se-Te NWs iii by using long Te nanorods as seeds Se-Te NWs with straight morphology were obtained. Many of these findings on Se-Te NW growth can be further generalized and provide very useful information for the rational synthesis of group VI based semiconductor NW compounds. Keywords Selenium Tellurium Nanowires Seeds H. Tao H. Liu D. Qin H Y. Cao Institute of Polymer Optoelectronic Materials and Devices Key Laboratory of Special Functional Materials South China University of Technology Guangzhou 510640 China e-mail qindh@scut.edu.cn X. Shan D. Yu Electron Microscopy Laboratory State Key Laboratory for Mesoscopic Physics School of Physics Peking University Beijing 100871 China Introduction One-dimensional 1D nanostructures such as nanowires NWs nanobelts nanorods and nanotubes have been the focus of intensive research due to their novel electronic properties and potential .