Abstract
In this work we report the synthesis of ZnO nanorods on glass substrates by a simple thermal evaporation of high purity Zn powder without the use of any catalyst. The product was obtained at atmospheric pressure by the oxidation of Zn vapour in a flow of Ar and O2 gas mixture at low temperature of glass substrates (390 °C). The morphology, phase composition and crystallinity of the nanostructures were investigated by scanning electron microscopy and X-ray diffraction analysis. Their electrical properties were studied via current-voltage (I–V) measurements. XRD demonstrates that the nanorods deposited consist predominantly of the wurtzite phase of ZnO with preferred c-axis orientation. The results show that the oxygen content in the deposition atmosphere influences strongly the morphology and electrical resistance of the produced ZnO nanostructures.
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