Title: Facile Fabrication of TiO(2) Nanorod Arrays for Gas Sensing using Double-Layered Anodic Oxidation Method
Authors: Lin, Hsiao-Wei
Chang, Yung-Huang
Chen, Chih
Department of Materials Science and Engineering
Issue Date: 1-Jan-2012
Abstract: Self-organized anodic titanium dioxide nanorod arrays were fabricated using a two-stage anodization method from superimposed Ti-Al layers deposited on quartz substrates. The morphology of nanorods could be controlled by the anodizing conditions of the aluminum (first stage) and the titanium layer (second stage). The first stage of anodization process controls the diameter and density of nanorods and the second stage of anodization controls the height of nanorods. Therefore, we could fabricate nanorod arrays with desired aspect ratio and density under specific anodizing conditions. Furthermore, we used TiO(2) nanorod arrays as the field ionization anode of a gas sensor, and the morphology of nanorods has shown to have a high correlation with the working voltage of gas sensing. The TiO(2) nanorods possess good selectivity and low working voltage under different atmosphere and their working electric field is lower than gas sensing using carbon nanotubes and ZnO nanowires as the anode. (C) 2011 The Electrochemical Society. [DOI: 10.1149/2.013201jes].
URI: http://dx.doi.org/10.1149/2.013201jes
ISSN: 0013-4651
DOI: 10.1149/2.013201jes
Volume: 159
Issue: 1
Begin Page: K5
End Page: K9
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