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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.


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

Show Author's information Wentian MiShih-Wen ChiuTao XueYuanquan ChenHanyu QiYi YangKea-Tiong TangTian-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.

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 oxide, gas sensor, signal acquisition system, thermal reduction

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Publication history

Received: 20 May 2016
Accepted: 21 June 2016
Published: 11 August 2016
Issue date: August 2016

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© The author(s) 2016

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 61574083 and 61434001), the National Key Basic Research and Development (973) Program of China (No. 2015CB352100), the National Key Project of Science and Technology (No. 2011ZX02403-002), Special Fund for Agroscientic Research in the Public Interest (No. 201303107) of China, and the Independent Research Program of Tsinghua University, China (No. 2014Z01006).

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