@article{discovery1574631, note = {{\copyright} 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.}, volume = {255}, pages = {1119--1129}, number = {Part 1}, month = {August}, journal = {Sensors and Actuators B: Chemical}, title = {Room temperature vanadium dioxide-carbon nanotube gas sensors made via continuous hydrothermal flow synthesis}, year = {2017}, issn = {0925-4005}, 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.}, author = {Evans, GP and Powell, MJ and Johnson, ID and Howard, DP and Bauer, D and Darr, JA and Parkin, IP}, url = {http://doi.org/10.1016/j.snb.2017.07.152}, keywords = {Gas sensor; carbon nanotubes; vandium oxides; continous hydrothermal flow synthesis; humidity sensing; ammonia gas} }