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Scanning electron micrograph of ZnO multiple nanorods (top) and photograph of the nanorods contacted by electrodes (bottom). The ZnO chip has an edge length of in the bottom photo.
Time dependence of resistance of either Pd-coated or uncoated multiple ZnO nanorods as the gas ambient is switched from to various concentrations of in air as time proceeds. There was no response to .
Relative response of Pd-coated nanorods as a function of concentration in .
Time dependence of resistance change of Pd-coated multiple ZnO nanorods as the gas ambient is switched from to oxygen or various concentrations of in air and then back to .
Arrhenius plot of rate of resistance change after exposure to in .
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