Selective H₂S sensing without external heat by a synergy effect in self-heated CuO-functionalized SnO₂-ZnO core-shell nanowiresSelective H2S sensing without external heat by a synergy effect in self-heated CuO-functionalized SnO2-ZnO core-shell nanowires
- Other Titles
- Selective H2S sensing without external heat by a synergy effect in self-heated CuO-functionalized SnO2-ZnO core-shell nanowires
- Authors
- Kim, Jae-Hun; Mirzaei, Ali; Bang, Jae Hoon; Kim, Hyoun Woo; Kim, Sang Sub
- Issue Date
- Dec-2019
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Self-heating; SnO2-ZnO; CuO; Core-shell nanowire; H2S; Gas sensor
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.300, pp.1 - 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 300
- Start Page
- 1
- End Page
- 11
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/11594
- DOI
- 10.1016/j.snb.2019.126981
- ISSN
- 0925-4005
- Abstract
- Future gas sensors require minimal power consumption to enable their integration into portable electronics such as smart mobile phones. We developed H₂S gas sensors based on a self-heating effect using metal oxide nanowires (NWs). We fabricated bare SnO₂ NWs, CuO functionalized SnO₂ NWs, and a CuO functionalized SnO₂-ZnO core-shell (C-S) NW sensor, and tested their sensor response towards H₂S gas by applying different external voltages at room temperature. It was found that the CuO functionalized SnO₂-ZnO C-S NW gas sensor had higher response to H₂S gas relative to other tested sensors due to higher self-heating effect, formation of heterojuncfions, phase transformation, and spillover effects of CuO nanoparticles. Without external heat, the selective H₂S detection obtained in this work demonstrates the possibility of embedding low power consumption gas sensors in portable devices for detection of H₂S as a biomarker for early diagnosis of diseases.
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