Abstract
The gas sensing properties of multiple-networked, Pt-loaded nanorod sensors were examined. Scanning electron microscopy revealed nanowires with diameters of 50-100 nm and lengths of a few micrometers. Transmission electron microscopy and X-ray diffraction showed that the nanrods were tetragonal-structured, single crystal . The Pt-loaded nanorod sensors exhibited sensitivities of 11.00, 10.26, 11.23 and 11.97% at concentrations of 10, 50, 100 and 200 ppm, respectively, at . These sensitivities were more than 10 times higher than those of bare- nanorod sensors. The response times of the sensors were 310, 260, 270 and 230 sec at concentrations of 10, 50, 100 and 200 ppm, respectively. The recovery times of the Pt-loaded nanorods were 390, 330, 335, and 330 sec at concentrations of 10, 50, 100 and 200 ppm, respectively. The origin of the enhanced sensing properties of the nanorods by Pt loading is discussed.
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