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AFPS2021-ABSTRACT BOITUMELO

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Room Temperature Hydrogen gas sensing of nanoscaled 1-D VO2

B.Mabachakacha•,1-3, M. Maaza2,3

1 Physics and Astronomy Dept., University of the Western Cape, Bellville,7535 Cape Town, South Africa

2 UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, Muckleneuk ridge, PO Box 392, Pretoria, South Africa

3 Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure Road, Somerset West, Western Cape 7129, PO Box 722, South

Africa

Abstract

room temperature. These nanobelts, synthesized by hydrothermal process and exhibiting the VO 2 (A) crystallographic phase, display room temperature H 2 sensitivity as low as 0.17 ppm.

The nanobelts (ultralong belt-like) nanostructures could be an ideal system for fully understanding dimensionally confined transport phenomena in functional oxides and for building functional devices based on individual nanobelts.

2021 International conference of the African Physical Society, 15-19 November 2021, Kigali-Rwanda

•BM Mabakachaba: [email protected]

Mott-type VO oxide nanobelts are demonstrated to be effective hydrogen gas sensors at

Hydrothermal process; Hydrogen; Gas sensor; Semiconductor metal oxide; Vanadium dioxide

Keywords:

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