tailieunhanh - Báo cáo hóa học: " Tube Formation in Nanoscale Materials"

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: Tube Formation in Nanoscale Materials | Nanoscale Res Lett 2008 3 473-480 DOI S11671-008-9193-6 NANO REVIEW Tube Formation in Nanoscale Materials Chenglin Yan Jun Liu Fei Liu Junshu Wu Kun Gao Dongfeng Xue Received 10 October 2008 Accepted 17 October 2008 Published online 4 November 2008 to the authors 2008 Abstract The formation of tubular nanostructures normally requires layered anisotropic or pseudo-layered crystal structures while inorganic compounds typically do not possess such structures inorganic nanotubes thus have been a hot topic in the past decade. In this article we review recent research activities on nanotubes fabrication and focus on three novel synthetic strategies for generating nanotubes from inorganic materials that do not have a layered structure. Specifically thermal oxidation method based on gas-solid reaction to porous CuO nanotubes has been successfully established semiconductor ZnS and Nb2O5 nanotubes have been prepared by employing sacrificial template strategy based on liquid-solid reaction and an in situ template method has been developed for the preparation of ZnO taper tubes through a chemical etching reaction. We have described the nanotube formation processes and illustrated the detailed key factors during their growth. The proposed mechanisms are presented for nanotube fabrication and the important pioneering studies are discussed on the rational design and fabrication of functional materials with tubular structures. It is the intention of this contribution to provide a brief account of these research activities. Keywords Nanotubes Chemical synthesis Nanostructures Inorganic materials C. Yan J. Liu F. Liu J. Wu K. Gao D. Xue El State Key Laboratory of Fine Chemicals Department of Materials Science and Chemical Engineering School of Chemical Engineering Dalian University of Technology Dalian 116012 China e-mail dfxue@ Introduction Recently considerable attention has been focused on micro- and nanostructured materials due to their unique properties

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