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Open Access

Highly Sensitive and Portable Gas Sensing System Based on Reduced Graphene Oxide

Wentian Mi, Shih-Wen Chiu, Tao Xue, Yuanquan Chen, Hanyu Qi, Yi Yang, Kea-Tiong Tang, Tian-Ling Ren( )
Institute of Microelectronics & Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University, Beijing 100084, China.
Department of Electrical Engineering, Tsing Hua University, Hsinchu 30013, China.
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Abstract

Graphene has been widely used in gas-sensing applications due to its large specific surface area and strong adsorption ability. Among different forms of graphene used as gas-sensing materials, reduced graphene oxide is one of the most convenient and economical materials to integrate with Si-based electronics, which is very important to graphene-based gas sensors. In addition, the stacking structure of graphene oxide flakes facilitates absorption and detection of gas molecules. Based on reduced graphene oxide, a highly sensitive and portable gas-sensing system was demonstrated here. Solution-based graphene oxide was cast on a chip like a TF memory card and then reduced thermally. A signal acquisition system was designed to monitor resistance variation as a sign of gas concentration. This miniature graphene-based gas sensor array demonstrates a new path for the use of graphene in gas-detection technologies. And the creation of a sensitive and portable graphene gas sensor also shows great potential in fields such as medicine and environmental science.

Keywords

reduced graphene oxidegas sensorsignal acquisition systemthermal reduction

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Tsinghua Science and Technology
Volume 21 Issue 4,
August 2016
Pages 435-441
DOI: 10.1109/TST.2016.7536721
Cite this article:
Mi W, Chiu S-W, Xue T, et al. Highly Sensitive and Portable Gas Sensing System Based on Reduced Graphene Oxide. Tsinghua Science and Technology, 2016, 21(4): 435-441. https://doi.org/10.1109/TST.2016.7536721

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Received: 20 May 2016
Accepted: 21 June 2016
Published: 11 August 2016
© The author(s) 2016
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