CUED Publications database

NH<inf>3</inf> sensing with self-assembled ZnO-nanowire μhP sensors in isothermal and temperature-pulsed mode

Shao, F and Fan, JD and Hernández-Ramírez, F and Fàbrega, C and Andreu, T and Cabot, A and Prades, JD and López, N and Udrea, F and De Luca, A and Ali, SZ and Morante, JR (2016) NH<inf>3</inf> sensing with self-assembled ZnO-nanowire μhP sensors in isothermal and temperature-pulsed mode. Sensors and Actuators, B: Chemical, 226. pp. 110-117. ISSN 0925-4005

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Abstract

© 2015 Elsevier B.V. All rights reserved. Dielectrophoretic alignment is found to be a simple and efficient method to deposit the solution prepared ZnO nanowires onto micro hot plate substrates. Due to the strong surface effects, positive temperature coefficient for resistance was encountered with ZnO nanowires in the high temperature range ( > 250 °C). The response to ammonia (NH 3 ) was evaluated in isothermal and temperature-pulsed operation mode; the relative higher response observed in the latter case demonstrates that the use of this methodology is a good strategy to improve the performance of metal oxide sensors based on nanomaterials. Here, we evaluate the response to NH 3 and qualitatively describe the sensing mechanism in temperature-pulsed mode, highlighting the main differences compared to the standard isothermal methodology.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:42
Last Modified: 07 Sep 2017 01:47
DOI: