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: Ordered Mesostructured CdS Nanowire Arrays with Rectifying Properties | Nanoscale Res Lett 2009 4 414-419 DOI s11671-008-9247-9 NANO EXPRESS Ordered Mesostructured CdS Nanowire Arrays with Rectifying Properties Na Yuan Gang Cheng Yanqing An Zuliang Du Sixin Wu Received 14 November 2008 Accepted 30 December 2008 Published online 6 February 2009 to the authors 2009 Abstract Highly ordered mesoporous CdS nanowire arrays were synthesized by using mesoporous silica as hard template and cadmium xanthate CdR2 as a single precursor. Upon etching silica mesoporous CdS nanowire arrays were produced with a yield as high as 93 wt . The nanowire arrays were characterized by XRD N2 adsorption TEM and SEM. The results show that the CdS products replicated from the mesoporous silica SBA-15 hard template possess highly ordered hexagonal mesostructure and fiber-like morphology analogous to the mother template. The current-voltage characteristics of CdS nanoarrays are strongly nonlinear and asymmetrical showing rectifying diode-like behavior. Keywords Nanomaterials CdS Nanowire arrays SBA-15 Rectification Introduction Efforts in nanomaterials have rapidly expanded into the assembly of well-ordered two- and or three-dimensional 2D and or 3D 3D superstructures provide possibilities to probe brand-new properties and applications due to the spatial orientation and arrangement of the nanocrystals 1-3 . Different methods have been used to fabricate preferentially oriented nanowire arrays such as electrodeposition 4-6 vapor-liquid-solid VLS 7 8 thermal evaporation 9-11 lithography 12 13 AAO 14 15 or mesoporous silica SBA-15 16 -assisted N. Yuan G. Cheng Y. An Z. Du S. Wu El Key Laboratory of Special Functional Materials Henan University Kaifeng 475001 People s Republic of China e-mail wusixin@ methods. In these methods SBA-15 template shows a promising technique in controlling the preferential orientation without changing the nanowire morphology and it has been explored for synthesis of Ag Au Pt Ph and Si nanowires 17 18 .
