Enhancing visible light-activated NO2 sensing properties of Au NPs decorated ZnO nanorods by localized surface plasmon resonance and oxygen vacancies

Chunxu Chen; Qiuping Zhang; Guangzhong Xie; Mingliang Yao; Hong Pan; Hongfei Du; Huiling Tai; Xiaosong Du; Yuanjie Su

doi:10.1088/2053-1591/ab6b64

Materials Research Express (Jan 2020)

Enhancing visible light-activated NO2 sensing properties of Au NPs decorated ZnO nanorods by localized surface plasmon resonance and oxygen vacancies

Chunxu Chen,
Qiuping Zhang,
Guangzhong Xie,
Mingliang Yao,
Hong Pan,
Hongfei Du,
Huiling Tai,
Xiaosong Du,
Yuanjie Su

Affiliations

Chunxu Chen: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People’s Republic of China
Qiuping Zhang: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People’s Republic of China
Guangzhong Xie: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People’s Republic of China
Mingliang Yao: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People’s Republic of China
Hong Pan: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People’s Republic of China
Hongfei Du: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People’s Republic of China
Huiling Tai: ORCiD; State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People’s Republic of China
Xiaosong Du: State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People’s Republic of China
Yuanjie Su: ORCiD; State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC) , Chengdu 610054, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/ab6b64
Journal volume & issue: Vol. 7, no. 1
p. 015924

Abstract

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Increasing light absorption is of crucial importance for optimizing light-activated gas detection. However, the relevant research is still far from sufficient. Herein, a high performance visible light-activated NO _2 gas sensor is developed relied on the localized surface plasmon resonance (LSPR) and increased surface oxygen vacancies. Au NPs decorated ZnO nanorod array as sensitive materials was synthesized via a two-step low temperature hydrothermal process. The influences of Au decoration and light wavelength on the sensing behaviors were systematically investigated. It is found that the Au NPs decoration can largely promote the visible light-activated gas sensing properties in comparison with pure ZnO film. In addition, the as-prepared sensors demonstrate excellent repeatability and selectivity as well as moisture stability. Moreover, the sensing mechanism based on LSPR was discussed in detail. This work not only sheds some lights on the fundamental understanding for the LSPR enhanced gas sensing mechanism, but also offers an approach in constructing high-performance light-activated gas sensor.

Published in Materials Research Express

ISSN: 2053-1591 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Technology: Chemical technology
Website: https://iopscience.iop.org/journal/2053-1591

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