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Open Access Nano Express

Ordered Mesostructured CdS Nanowire Arrays with Rectifying Properties

Na Yuan, Gang Cheng, Yanqing An, Zuliang Du and Sixin Wu*

Author Affiliations

Key Laboratory of Special Functional Materials, Henan University, Kaifeng, 475001, People’s Republic of China

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Nanoscale Research Letters 2009, 4:414-419  doi:10.1007/s11671-008-9247-9

Published: 6 February 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, N2adsorption, 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