Gui Z, Fan R, Mo WQ, Chen XH, Yang L, Zhang SY, Hu Y, Wang ZZ, Fan WC (2002) Precursor morphology controlled formation of rutile VO2 nanorods and their self-assembled structure. Chemistry of Materials 14(12), 5053-5056. [In English]

Web link: http://dx.doi.org/10.1021/cm020178f

Keywords:

nanocrystalline vo2; optical-properties; catalytic growth; vapor; transport; nanowires; films;

Abstract: Rutile VO2 nanorods have been synthesized by the precursor morphology controlled formation. The precursor single-crystal VO2 hydrate nanorods have been obtained via the hydrothermal reaction of KOH, V2O5, and hydrazine in a sealed autoclave at low temperature. The reducing agent N2H4 plays a key role in the control of one-dimensional morphology. According to the data of differential scanning calorimetry and thermogravimetric analysis, rutile VO2 nanorods have been formed when the precursor VO2 hydrate is heated at 340 degreesC for 1 day in flowing N-2 and maintaining the morphology of the precursor. The products have been characterized by means of X-ray powder diffraction, transmission electron microscopy, high-resolution electron microscopy, selected area electron diffraction, and X-ray energy-dispersive spectroscopy techniques. It is shown that these rutile VO2 nanorods are self-assembled by VO2 nanocrystalline domains with the same crystallographic direction along the rod axis. The reaction details and features are described and discussed.