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http://dx.doi.org/10.5762/KAIS.2016.17.9.502

Growth of Two-Dimensional Nanostrcutured VO2 on Graphene Nanosheets  

Oh, Su-Ar (Department of Advanced Chemical Engineering, Mokwon University)
Kim, Ki-Chul (Department of Advanced Chemical Engineering, Mokwon University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.17, no.9, 2016 , pp. 502-507 More about this Journal
Abstract
Vanadium dioxide, $VO_2$, is a thermochromic material that exhibits a reversible metal-insulator phase transition at $68^{\circ}C$, which accompanies rapid changes in the optical and electronic properties. To decrease the transition temperature around room temperature, a number of studies have been performed. The phase transition temperature of 1D nanowire $VO_2$ with a 100 nm diameter was reported to be approximately $29^{\circ}C$. In this study, 1D or 2D nanostructured $VO_2$ was grown using the vapor transport method. Vanadium dioxide has a different morphology with the same growth conditions for different substrates. The 1D nanowires $VO_2$ were grown on a Si substrate ($Si{\setminus}SiO_2$(300 nm), whereas the 2D & 3D nanostructured $VO_2$ were grown on an exfoliated graphene nanosheet. The crystallographic properties of the 1D or 2D & 3D nanostructured $VO_2$, which were grown by thermal CVD, and exfoliated-transferred graphene nanosheets on a Si wafer which was used as substrate for the vanadium oxide nanostructures, were analyzed by Raman spectroscopy. The as-grown vanadium oxide nanostructures have a $VO_2$ phase, which are confirmed by Raman spectroscopy.
Keywords
2-dimensional nanostructure; graphene nanosheet; phase transition; thermochromic; vanadium dioxide;
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