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@inproceedings{Thomas:2014:10.1016/j.proeng.2014.11.328,
author = {Thomas, S and Cole, M and De, Luca A and Torrisi, F and Ferrari, AC and Udrea, F and Gardner, JW},
doi = {10.1016/j.proeng.2014.11.328},
pages = {999--1002},
title = {Graphene-coated Rayleigh SAW resonators for NO <inf>2</inf> detection},
url = {http://dx.doi.org/10.1016/j.proeng.2014.11.328},
year = {2014}
}

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TY  - CPAPER
AB  - © 2014 Published by Elsevier Ltd.  This paper describes the development of a novel low-cost Rayleigh Surface Acoustic Wave Resonator (SAWR) device coated with a graphene layer that is capable of detecting PPM levels of NO 2 in air. The sensor comprises two 262 MHz ST-cut quartz based Rayleigh SAWRs arranged in a dual oscillator configuration; where one resonator is coated with gas-sensitive graphene, and the other left uncoated to act as a reference. An array of NMP-dispersed exfoliated reduced graphene oxide dots was deposited in the active area inside the SAWR IDTs by a non-contacting, micro ink-jet printing system. An automated Mass Flow Controller system has been developed that delivers gases to the SAWR sensors with circuitry for excitation, amplification, buffering and signal read-out. This SAW-based graphene sensor has sensitivity to NO 2 of ca. 25 Hz/ppm and could be implemented in a low-power low-cost gas sensor.
AU  - Thomas,S
AU  - Cole,M
AU  - De,Luca A
AU  - Torrisi,F
AU  - Ferrari,AC
AU  - Udrea,F
AU  - Gardner,JW
DO  - 10.1016/j.proeng.2014.11.328
EP  - 1002
PY  - 2014///
SN  - 1877-7058
SP  - 999
TI  - Graphene-coated Rayleigh SAW resonators for NO <inf>2</inf> detection
UR  - http://dx.doi.org/10.1016/j.proeng.2014.11.328
ER  -

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