| Sn-catalyzed synthesis of SnO2 nanowires and their optoelectronic characteristics |
Lin-Bao Luo, Feng-xia Liang, Jian-sheng Jie
Abstract We report the rational synthesis of one-dimensional SnO2 nanowires (SnO2NWs) via a Sn-catalyzed vapour-liquid solid growth mechanism, in which Sn nanoparticles can direct the oriented growth of SnO2NWs at high temperature. I-V measurement of field effect transistor made of individual SnO2NW exhibits typical n-type semiconducting characteristics, with an electron mobility and concentration of 14.36 cm2/Vs, and 1.145×1017 cm-3, respectively. The SnO2NW-based photodetector shows high sensitivity to the UV light radiation, and a fast light response speed of millisecond rise time/fall time with excellent stability and reproducibility, whereas nearly blind to illumination with wavelengths in visible range. Detailed reasons accounting for the detection selectivity and rapid response speed were proposed. The generality of the above results suggests that our SnO2NW photodetectors have potential application in nanoscaled optoelectronic devices.
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