9-13 July 2012
Africa/Johannesburg timezone
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Comparative Study of Nanostructures VO2 nanoplates: Annealing effect and Structural Properties

Presented by Ms. Aline SIMO on 10 Jul 2012 from 15:30 to 15:50
Type: Oral Presentation
Session: DCMPM2
Track: Track A - Division for Condensed Matter Physics and Materials

Abstract

Significant changes in optical and transport properties of vanadium dioxide nanomaterials induced by the metal to semi conductor phase transformation make vanadium dioxide a well technological material with many applications as gas sensing, smart materials, solar cells, optical limiting, infrared modulators, and light polarizer. Here we present the synthesis of nanoplatelets VO2 (A) by the hydrothermolysis approach. The composition and nanostructure was analysed by Raman spectroscopy. The annealing treatment in argon gas at 500˚ C for 3hrs was applied to study the effect of heat catalyst upon the atomic structure and vibrational modes of the material. Crystallization temperature is shifted to around 67 ˚ C critical temperature of VO2 (M). The final product is well crystallized and the surface structure presents small amount of V2O5.

Award

yes

Level

PhD

Supervisor

Prof Malik Maaza/maaza@tlabs.ac.za/iThemba LABS

Paper

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