Title: Ordered semiconductor CdO nanowire arrays: synthesising by one-step low-temperature electrodeposition and optical properties

Authors: Qingtao Wang, Guanzhong Wang, Xiaoping Wang

Addresses: Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China; Department of Physics, Qingdao University, Qingdao, Shandong 266071, China; Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China. ' Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China; Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China. ' Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China; Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China

Abstract: One-step low-temperature electrodeposition has been employed to fabricate ordered polycrystalline CdO nanowire arrays using anodic alumina membrane (AAM) templates by reduction of dissolved oxygen in presence of Cd²⁺ in the electrolyte. The CdO nanowires are uniform, and their length depends on the electrodeposition time and more than 30 µm length nanowires can be easily got by this method. The structure characterisation and optical properties of the CdO nanowires are discussed in the paper. The blue shift of the direct band gap determined by the optical absorption of the CdO nanowires is attributed to the interface effect and the quantum confinement effect of the CdO nano-crystalline grains.

Keywords: CdO; nanowires; nanowire arrays; templates; anodic alumina membrane; electrodeposition; optical properties; nanotechnology.

DOI: 10.1504/IJNT.2007.012318

International Journal of Nanotechnology, 2007 Vol.4 No.1/2, pp.110 - 118

Published online: 05 Feb 2007 *

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