journal article·2019-07-01Open access

Gas sensor based on defective graphene/pristine graphene hybrid towards high sensitivity detection of NO2

Jun Ma, Miao Zhang, Linxi Dong, Yinbo Sun, Yanjie Su, Zhongying Xue, Zengfeng Di

AIP Advances· Volume 9· Issue 7

Abstract

We propose an approach to improve the performance of graphene-based gas sensors by the integration of defective graphene with pristine graphene. The defect density of defective graphene is controlled by the fluence of Si+ implantation, and an H2 etching process is utilized to tune defect size. As defects are able to adsorb target gas efficiently, the response of graphene-based sensors was improved remarkably with the controllable defect density. The response sensitivity of a defective-graphene-based sensor to concentrations of NO2 at 100 ppm can be as high as 248%, 13 times higher than that of a sensor built using pristine graphene. In addition, defective-graphene-based sensors exhibit high response and recovery rates at room temperature, which is comparable to those of pristine graphene-based sensors and faster than conventional defect-decorated graphene sensors. Most importantly, defective-graphene-based gas sensors exhibit excellent reproducibility, stability, and selectivity. Our study suggests a simple and effective strategy for the mass production of high-performance graphene-based gas sensors for NO2 gas detection.
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Research context

OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Graphene research and applications · Analytical Chemistry and Sensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences 1 , Shanghai 200050, China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences 2 , Beijing 100049, China

The Key Laboratory of RF Circuits and System of Ministry of Education, College of Electronic and Information, Hangzhou Dianzi University 3 , Hangzhou 310018, China

Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University 4 , Shanghai 200240, China

Funding

Key Research Project of Frontier Science, Chinese Academy of Sciences · the Programe of Shanghai Academic/Technology Research Leader · the Strategic Priority Research Program · National Natural Science Foundation of China

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