A Transparent Nanopatterned Chemiresistor: Visible-Light Plasmonic Sensor for Trace-Level NO2 Detection at Room Temperature
- Authors
- Lim, Kyeorei; Jo, Young-Moo; Yoon, Ji-Wook; Kim, Jun-Sik; Lee, Dong-Jae; Moon, Young Kook; Yoon, Ji Won; Kim, Jae-Hyeok; Choi, Hun Ji; Lee, Jong-Heun
- Issue Date
- 5월-2021
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- near& #8208; field electrospinning; NO; (2) gas sensors; room& #8208; temperature gas sensors; transparent gas sensors; visible light assisted gas sensors
- Citation
- SMALL, v.17, no.20
- Indexed
- SCIE
SCOPUS
- Journal Title
- SMALL
- Volume
- 17
- Number
- 20
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/128949
- DOI
- 10.1002/smll.202100438
- ISSN
- 1613-6810
- Abstract
- The highly selective detection of trace gases using transparent sensors at room temperature remains challenging. Herein, transparent nanopatterned chemiresistors composed of aligned 1D Au-SnO2 nanofibers, which can detect toxic NO2 gas at room temperature under visible light illumination is reported. Ten straight Au-SnO2 nanofibers are patterned on a glass substrate with transparent electrodes assisted by direct-write, near-field electrospinning, whose extremely low coverage of sensing materials (approximate to 0.3%) lead to the high transparency (approximate to 93%) of the sensor. The sensor exhibits a highly selective, sensitive, and reproducible response to sub-ppm levels of NO2, and its detection limit is as low as 6 ppb. The unique room-temperature NO2 sensing under visible light emanates from the localized surface plasmonic resonance effect of Au nanoparticles, thereby enabling the design of new transparent oxide-based gas sensors without external heaters or light sources. The patterning of nanofibers with extremely low coverage provides a general strategy to design diverse compositions of gas sensors, which can facilitate the development of a wide range of new applications in transparent electronics and smart windows wirelessly connected to the Internet of Things.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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