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Graphene-coated rayleigh SAW resonators for NO2 detection
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Thomas, Stephen M., Cole, Marina, De Luca, A., Torrisi, F., Ferrari, A. C., Udrea, Florin and Gardner, J. W. (2014) Graphene-coated rayleigh SAW resonators for NO2 detection. Procedia Engineering, Volume 87 . pp. 999-1002. doi:10.1016/j.proeng.2014.11.328 ISSN 1877-7058.
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WRAP_Gardner_1-s2.0-S1877705814024436-main.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (955Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.proeng.2014.11.328
Abstract
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 NO2 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 NO2 of ca. 25 Hz/ppm and could be implemented in a low-power low-cost gas sensor.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
| Library of Congress Subject Headings (LCSH): | Graphene -- Industrial applications, Nitrogen dioxide, Gas detectors | ||||
| Journal or Publication Title: | Procedia Engineering | ||||
| Publisher: | Elsevier | ||||
| ISSN: | 1877-7058 | ||||
| Official Date: | 31 December 2014 | ||||
| Dates: |
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| Volume: | Volume 87 | ||||
| Number of Pages: | 4 | ||||
| Page Range: | pp. 999-1002 | ||||
| DOI: | 10.1016/j.proeng.2014.11.328 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Date of first compliant deposit: | 28 December 2015 | ||||
| Date of first compliant Open Access: | 28 December 2015 | ||||
| Title of Event: | EUROSENSORS 2014, the 28th European Conference on Solid-State Transducers | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Brecia, Italy | ||||
| Date(s) of Event: | 7-10 Sep 2014 |
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