4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
Paper Review: Initial screening in progress
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Improving gas sensing properties of multi-walled carbon nanotubes by vanadium oxide encapsulation

Presented by Dr. George CHIMOWA on 6 Jul 2016 from 16:10 to 18:00
Type: Poster Presentation
Track: Track F - Applied Physics
Board #: F.078

Abstract

Manipulation of electrical properties and hence gas sensing properties of multi-walled carbon nanotubes by filling the inner wall with vanadium is presented. Using a simple capillary technique, multi-walled carbon nanotubes are filled with vanadium oxide and this significantly enhances their sensitivity for gas detection. The encapsulated vanadium oxide inside the inner walls of carbon nanotubes increases the density of states around the Fermi level for the composite material and this improves the sensitivity of the filled carbon nanotubes. An adsorption mechanism on three different sites on the carbon nanotube surface based on the Langmuir model is proposed. This work further highlights the influence of ambient oxygen in carbon nanotubes based sensors an aspect which has not been clearly outlined in many earlier theoretical and experimental studies.

Award

No

Level

N/A

Supervisor

Dr Bonex Mwakikunga, DST-CSIR NCNSM, Council of Scientific and Industrial Research.

Paper

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Permission

No

Place

Location: Kramer Law building
Address: UCT Middle Campus Cape Town
Room:


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