Synthesis and Characterization of TeO2 Nanowires

概要

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TeO2 nanowires were successfully synthesized by a simple reactive thermal evaporation method using pure Te metal as the source material. The study on synthesis process indicates an optimal synthesis temperature of 400 °C. Structural characterization using X-ray diffraction and transmission electron microscopy shows that the TeO2 nanowires have a single phase tetragonal structure. Scanning electron microscopy observation demonstrates that each TeO2 nanowire starts to grow from a TeO2 nanopartice, which suggests a self-catalytic growth mechanism. The Fourier transform infrared spectrum of TeO2 nanowires shows a blue shift of 20 cm-1 in the axial stretching bands. The gas sensing measurements indicate that TeO2 nanowires have a p-type electrical conduction and can reversibly response to NO2 gas at room temperature.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2008-01-25