CO Sensor Based on Au–TiO2 Nanowires Prepared by Conventional Heat-Treatment
Au–TiO2 nanowires were successfully prepared by sputtering an Au/Ti multilayer, which was followed by heat treatment at 800 °C under a very limited oxygen environment. The nanowire formation was explained by VLS mechanism. This nanostructure was used as a CO gas
sensor. The sensor showed a good sensitivity toward 100 ppm CO gas at 450 °C. The sensing behavior of the Au–TiO2 nanowires was enhanced by the incorporation of a catalytic noble metal on the surface of the base metal oxide sensor and the larger surface area produced by
the nano-structure.
Keywords: AU CATALYST; CO SENSORS; NANOSTRUCTURES; TIO2
Document Type: Research Article
Publication date: 01 December 2013
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