7-11 July 2014
Africa/Johannesburg timezone
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Investigation of plasma dynamics effect on the properties of the vanadium oxide thin films

Presented by Ms. Bathusile MASINA on 10 Jul 2014 from 10:00 to 10:20
Type: Oral Presentation
Session: DPCMM1
Track: Track A - Division for Physics of Condensed Matter and Materials

Abstract

This study presents the influence of the plume expansion dynamics on the properties of the vanadium oxide thin films. The plume expansion dynamics study have been carried out on vanadium-oxygen plasma generated using 248 nm, 25 ns pulses from an excimer KrF laser under oxygen atmosphere at the laser fluence of 2 Jcm-2 using VO2 pellet. Vanadium oxide thin films have been deposited on a corning glass substrate by ablating a VO2 pellet at the same conditions of oxygen pressure and laser fluence used for the plasma study. The substrate temperature was fixed at 500 oC and target-substrate distance was determined using the plasma plume results. We successfully deposited pure monoclinic rutile-typed VO2 (M) phase at 0.05 mbar for 30 mm and 0.01 mbar for 30 and 38 mm. A pure orthorhombic V2O5 phase was successfully deposited at 0.1 mbar of 27 and 34 mm. A mixture of vanadium oxide phases was found at 0.2 mbar for 29 mm and at 0.05 mbar for 35 mm. Scanning electron microscopy and atomic force microscopy indicated nanostructures for the monoclinic rutile-typed VO2 (M) phase and nano-wire and nano-plate for the V2O5 phase.

Award

Yes

Level

PhD

Supervisor

Prof. Andrew Forbes (AForbes1@csir.co.za) CSIR National Laser Centre and Univerisity of Kwazulu-Natal

Paper

No

Place

Room: D Les 201


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