Sari, WP;
Blackman, C;
Zhu, Y;
Covington, J;
(2019)
AACVD Grown WO3 Nanoneedles Decorated with Ag/Ag2O Nanoparticles for Oxygen Measurement in a Humid Environment.
IEEE Sensors Journal
, 19
(3)
pp. 826-832.
10.1109/JSEN.2018.2878051.
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Abstract
A sensitive material consisting of silver/silver oxide decorated WO3 was successfully grown in two steps via aerosol-assisted chemical vapour deposition (AACVD). Morphological, structural, and composition analysis revealed our method is effective for growing WO3 nanoneedles decorated with silver/silver oxide nanoparticles at relatively low temperature (≤375°C) onto sensor arrays printed on alumina substrate. The sensors were tested for oxygen under humid environment (relative humidity ~85%) with the concentration ranging between 0% and 20%. Gas sensing results showed good response to oxygen with optimum temperature was observed at 400°C for undecorated WO3 and at 350°C for silver/silver oxide decorated WO3. The addition of silver/silver oxide was found to improve the sensor response by almost 300%, making the sensor a potential alternative to replace existing Pb-based oxygen sensor.
| Type: | Article |
|---|---|
| Title: | AACVD Grown WO3 Nanoneedles Decorated with Ag/Ag2O Nanoparticles for Oxygen Measurement in a Humid Environment |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JSEN.2018.2878051 |
| Publisher version: | https://doi.org/10.1109/JSEN.2018.2878051 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Temperature sensors , Films , Gas detectors , Temperature measurement , Chemical sensors , Substrates , Chemical sensor , Heterojunction , Oxygen detection , Silver oxide , Thin film sensor , Tungsten oxide |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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/10061155 |
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