期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 255, 期 -, 页码 1119-1129出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.07.152
关键词
Gas sensor; Carbon nanotubes; Vandium oxides; Continous hydrothermal flow synthesis; Humidity sensing; Ammonia gas
资金
- EPSRC Grant as part of UCL's Security Science Doctoral Training Centre [EP/G037264/1]
- Engineering and Physical Sciences Research Council [1717420, 1207381, 1353578] Funding Source: researchfish
Vanadium dioxide-carbon nanotube (VO2-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 VO2-CNT nanocomposites were investigated and compared with sensors of CHFS-made VO2 without added carbon. The VO2-CNT nanocomposites were found to display high sensitivity to H2O vapour, showing excellent potential as humidity sensors. Furthermore, p-type responses to ammonia gas were observed, with the VO2 (no carbon) sensors showing the largest response. Overall, surface composition and microstructure were found to greatly influence sensor responses to H2O vapour and NH3 gas. (C) 2017 Published by Elsevier B.V.
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