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https://doi.org/10.1021/acssensors.9b01275
Title: | Radiation Enhancement by Graphene Oxide on Microelectromechanical System Emitters for Highly Selective Gas Sensing | Authors: | Li, Nanxi YUAN HONGYE Xu, Linfang Tao, Jifang Ng, Doris Keh Ting Lee, Lennon Yao Ting Cheam, Daw Don Zeng, Yongquan Qiang, Bo Wang, Qijie Cai, Hong Singh, Navab Zhao Dan |
Keywords: | Science & Technology Physical Sciences Chemistry, Multidisciplinary Chemistry, Analytical Nanoscience & Nanotechnology Chemistry Science & Technology - Other Topics MEMS emitters thermal emission graphene oxide radiation enhancement infrared gas sensing THERMAL-DECOMPOSITION EMISSION AIR |
Issue Date: | 1-Oct-2019 | Publisher: | AMER CHEMICAL SOC | Citation: | Li, Nanxi, YUAN HONGYE, Xu, Linfang, Tao, Jifang, Ng, Doris Keh Ting, Lee, Lennon Yao Ting, Cheam, Daw Don, Zeng, Yongquan, Qiang, Bo, Wang, Qijie, Cai, Hong, Singh, Navab, Zhao Dan (2019-10-01). Radiation Enhancement by Graphene Oxide on Microelectromechanical System Emitters for Highly Selective Gas Sensing. ACS SENSORS 4 (10) : 2746-2753. ScholarBank@NUS Repository. https://doi.org/10.1021/acssensors.9b01275 | Abstract: | Copyright © 2019 American Chemical Society. Infrared gas sensors have been proven promising for broad applications in Internet of Things and Industrial Internet of Things. However, the lack of miniaturized light sources with good compatibility and tunable spectral features hinders their widespread utilization. Herein, a strategy is proposed to increase the radiated power from microelectromechanical-based thermal emitters by coating with graphene oxide (GO). The radiation can be substantially enhanced, which partially stems from the high emissivity of GO coating demonstrated by spectroscopic methods. Moreover, the sp2 structure within GO may induce plasmons and thus couple with photons to produce blackbody radiation and/or new thermal emission sources. As a proof-of-concept demonstration, the GO-coated emitter is integrated into a multifunctional monitoring platform and evaluated for gas detection. The platform exhibits sensitive and highly selective detection toward CO2 at room temperature with a detection limit of 50 ppm and short response/recovery time, outperforming the state-of-the-art gas sensors. This study demonstrates the emission tailorability of thermal emitters and the feasibility of improving the associated gas sensing property, offering perspectives for designing and fabricating high-end optical sensors with cost-effectiveness and superior performance. | Source Title: | ACS SENSORS | URI: | https://scholarbank.nus.edu.sg/handle/10635/169618 | ISSN: | 2379-3694 | DOI: | 10.1021/acssensors.9b01275 |
Appears in Collections: | Staff Publications Elements |
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