Evans, GP;
Powell, MJ;
Johnson, ID;
Howard, DP;
Bauer, D;
Darr, JA;
Parkin, IP;
(2017)
Room temperature vanadium dioxide–carbon nanotube gas sensors made via continuous hydrothermal flow synthesis.
Sensors and Actuators B: Chemical
, 255
(Part 1)
pp. 1119-1129.
10.1016/j.snb.2017.07.152.
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Abstract
Vanadium dioxide–carbon nanotube (VO 2 –CNT) nanocomposite materials were produced via a continuous hydrothermal flow synthesis (CHFS) method. The composites were made in a single step from CHFS using dispersions of commercially available single-walled carbon nanotubes (SWCNTs) or multi-walled carbon nanotubes (MWCNTs) in a metal salt solution (aq.). The room temperature gas sensing characteristics of the VO 2 -CNT nanocomposites were investigated and compared with sensors of CHFS-made VO 2 without added carbon. The VO 2 -CNT nanocomposites were found to display high sensitivity to H 2 O vapour, showing excellent potential as humidity sensors. Furthermore, p-type responses to ammonia gas were observed, with the VO 2 (no carbon) sensors showing the largest response. Overall, surface composition and microstructure were found to greatly influence sensor responses to H 2 O vapour and NH 3 gas.
| Type: | Article |
|---|---|
| Title: | Room temperature vanadium dioxide–carbon nanotube gas sensors made via continuous hydrothermal flow synthesis |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.snb.2017.07.152 |
| Publisher version: | http://doi.org/10.1016/j.snb.2017.07.152 |
| Language: | English |
| Additional information: | © 2017 Published by Elsevier B.V. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Gas sensor; carbon nanotubes; vandium oxides; continous hydrothermal flow synthesis; humidity sensing; ammonia gas |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1574631 |
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