Realization of Au-decorated WS2 nanosheets as low power-consumption and selective gas sensors
- Authors
- Kim, Jae-Hun; Mirzaei, Ali; Kim, Hyoun Woo; Kim, Sang Sub
- Issue Date
- Oct-2019
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- 2D WS2; Au-decoration; Self-heating; Gas sensor; Sensing mechanism
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.296, pp.1 - 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 296
- Start Page
- 1
- End Page
- 11
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/12441
- DOI
- 10.1016/j.snb.2019.126659
- ISSN
- 0925-4005
- Abstract
- We introduced a selective and self-heated CO gas sensor based on Au-decorated WS2 nanosheets. Au nanoparticles (NPs) were decorated on WS2 NSs using UV irradiation technique at different irradiation times (1, 15 and 30 s). SiO₂ grown on Si was used as substrates and the gas sensors with top electrode configuration were fabricated. Gas sensors were able to work under self-heating mode with an applied voltage of 2 V for selective CO sensing. The results of CO gas sensing demonstrated the promising effects of Au for the enhanced response and selectivity towards CO gas. Also, the low-voltage operation at room temperature resulted in low-power consumption. This study demonstrates realization of selective CO gas sensor using a facile approach along with low power consumption.
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