Effect of annealing on metal-insulator transition of VO₂ (M) nanorods
by Ying Luo; Ming Li; Guanghai Li
International Journal of Nanoparticles (IJNP), Vol. 7, No. 2, 2014

Abstract: The influence of annealing treatment on the metal-insulator transition (MIT) of VO₂ (M) nanorods was studied. The phase structure and content of the products were analysed by X-ray diffractometer (XRD), and the MIT was analysed by differential scanning calorimeter (DSC). It was found that VO₂ (M) nanorods have uneven thickness and round tip in comparison with a uniform thickness and sharp tip in VO₂ (B) nanorods, and there are two MITs in the DSC curves in the phase mixture of VO₂ (M) and VO₂ (B), one is situated at low temperature region and another is at high temperature side, and the high temperature MIT exists only in pure VO₂ (M) at and beyond annealing temperature of 550°C. The mechanisms of these two MITs were discussed and analysed.

Online publication date: Tue, 30-Sep-2014

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