Optimizing the synthesis of vanadium–oxygen nanostructures by plasma plume dynamics using optical imaging

Bathusile N. Masina; Slimane Lafane; Lorinda Wu; Samira Abdelli-Messaci; Tahar Kerdja; Andrew Forbes

doi:10.1117/1.OE.54.3.037106

13 March 2015 Optimizing the synthesis of vanadium–oxygen nanostructures by plasma plume dynamics using optical imaging

Bathusile N. Masina, Slimane Lafane, Lorinda Wu, Samira Abdelli-Messaci, Tahar Kerdja, Andrew Forbes

Author Affiliations +

Optical Engineering, Vol. 54, Issue 3, 037106 (March 2015). https://doi.org/10.1117/1.OE.54.3.037106

Abstract

The effect of an oxygen atmosphere on the expansion dynamics of a laser-produced vanadium-oxygen plasma has been investigated using a fast intensified charged-coupled device camera. We find regimes of the plasma plume expansion ranging from a free plume at vacuum and low oxygen pressures, through collisional and shock-wave-like hydrodynamic regimes at intermediate oxygen pressure, finally reaching a confined plume with subsequent thermalization of the plume particles at the highest pressure of the oxygen gas. Vanadium oxide nanostructures thin films were synthesized from this plasma and the resulting vanadium oxide phases studied as a function of the plume dynamics. We found monoclinic vanadium dioxide (VO₂) (M1) and VO₂ (B) nanoparticles in thin films deposited at 0.05 mbar. Pure phases of vanadium trioxide (V₂O₃) smooth and pentoxide (V₂O₅) nanorods thin films were detected at 0.01 and 0.1 to 0.2 mbar, respectively. Thin films containing VO₂ (M1) were found to have a reversible metal-to-insulator transition at 61°C. This work paves the way to VO phase control by judicious choice of laser and plasma conditions.

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Bathusile N. Masina, Slimane Lafane, Lorinda Wu, Samira Abdelli-Messaci, Tahar Kerdja, and Andrew Forbes "Optimizing the synthesis of vanadium–oxygen nanostructures by plasma plume dynamics using optical imaging," Optical Engineering 54(3), 037106 (13 March 2015). https://doi.org/10.1117/1.OE.54.3.037106

Published: 13 March 2015

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