Synthesis and Transport Properties of Nanostructured VO₂ by Mechanochemical Processing

The high-energy milling of the V₂O₅-Na₂SO₃ mixture in the range of 5 - 100 min leads to a synthesis of monoclinic VO₂. The starting and minimum (at 220 °C) values of electric resistance R of the 100 min milled and pressed VO₂-Na₂SO₄ mixture were 13.9 MΩ and 91.5 kΩ, respectively. The subsequent washing of the as-milled powder partially leads to the development of VO₂ nanostructures with tube-like, sheet-like and rod-like morphology, besides VO₂ (B) belt-like morphology, depending on the milling times.