Scientific Results

Transfer of CVD-grown graphene for room temperature gas sensors

Year: 2017

Authors: Rigoni F., Maiti R., Baratto C., Donarelli M., MacLeod J., Gupta B., Lyu M., Ponzoni A., Sberveglieri G., Motta N., Faglia G.

Autors Affiliation: Sensor Lab, Department of Information Engineering, University of Brescia, Via Branze 38, I-25123 Brescia, Italy; Sensor Lab, CNR-INO Via Branze 45, I-25123 Brescia, Italy; School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology(QUT),2 George Street, Brisbane 4001 Queensland, Australia; Nano Sensor Systems srl, University of Brescia, Via Branze 38, I-25123 Brescia, Italy

Abstract: An easy transfer procedure to obtain graphene-based gas sensing devices operating at room temperature (RT) is presented. Starting from chemical vapor deposition-grown graphene on copper foil, we obtained single layer graphene which could be transferred onto arbitrary substrates. In particular, we placed single layer graphene on top of a SiO2/Si substrate with pre-patterned Pt electrodes to realize a chemiresistor gas sensor able to operate at RT. The responses to ammonia (10, 20, 30 ppm) and nitrogen dioxide (1, 2, 3 ppm) are shown at different values of relative humidity, in dark and under 254 nm UV light. In order to check the sensor selectivity, gas response has also been tested towards hydrogen, ethanol, acetone and carbon oxide. Finally, a model based on linear dispersion relation characteristic of graphene, which take into account humidity and UV light effects, has been proposed.

Journal/Review: NANOTECHNOLOGY

Volume: 28 (41)      Pages from: 414001-1  to: 414001-8

More Information: The research leading to these results was partially funded by the NATO Science for Peace and Security Programme under grant No 985043. The authors would like to acknowledge QUT Central Analytical Research Facility and Queensland Chinese Academy of Science Collaboration Fund on Graphene Thin Film Supercapacitors.
KeyWords: ammonia gas sensor; grapheme; graphene gas sensor; graphene transfer; humidity effect; room temperature gas sensor; UV effect
DOI: 10.1088/1361-6528/aa8611

Citations: 12
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English