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http://dx.doi.org/10.5369/JSST.2014.23.5.305

Synthesis of Au-Decorated TiO2 Nanotubes on Patterned Substrates for Selective Gas Sensor  

Kim, Do Hong (Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University)
Shim, Young-Seok (Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University)
Jang, Ho Won (Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University)
Publication Information
Journal of Sensor Science and Technology / v.23, no.5, 2014 , pp. 305-309 More about this Journal
Abstract
Well-ordered $TiO_2$ nanotubes with Au nanoparticles are a desirable configuration to enhance the gas sensing properties such as response and selectivity due to their high surface area to volume ratio and catalytic effect of Au nanoparticles. We have synthesized the well-ordered $TiO_2$ nanotubes directly on a Pt IDEs patterned $SiO_2/Si$ substrate and then decorated Au nanoparticles on inner and outer surface of $TiO_2$ nanotubes using electrodeposition method. The Au-decorated $TiO_2$ nanotubes shows ultrahigh response to $C2_H_5OH$ and the highest increasing ratio to $H_2$ compared with other gases.
Keywords
Gas sensors; Oxide semiconductors; $TiO_2$; nanotube;
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