Indium-implantation-induced enhancement of gas sensing behaviors of SnO2 nanowires by the formation of homo-core-shell structure
- Title
- Indium-implantation-induced enhancement of gas sensing behaviors of SnO2 nanowires by the formation of homo-core-shell structure
- Author
- 김현우
- Keywords
- In implantation; SnO2 nanowire; Core-shell; Gas sensor; Sensing mechanism
- Issue Date
- 2020-10
- Publisher
- ELSEVIER SCIENCE SA
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v. 321, no. 128475, page. 1-10
- Abstract
- We present a new sensing mechanism concept to explain the enhanced gas response of In-implanted SnO2 nanowires (NWs) obtained by ion implantation. We first prepared SnO2 NWs and then implanted indium ions on SnO2 NWs at doses of 2 x 10(14) and 1.8 x 10(15) ion/cm(2), respectively. Gas sensors were fabricated, and the gas sensing properties of pristine and In-implanted SnO2-NW-based gas sensors were investigated. The sensing results demonstrated that the implanted In3+ improved the gas sensing performance. The obtained results indicated that the sensing improvement of the In-implanted (2 x 10(14) ion/cm(2)) SnO2 NW gas sensor was associated with the formation of structural defects and, most importantly, generation of a homo-core-shell structure within the SnO2 NWs. This structure acted as a powerful source of resistance modulation and significantly improved the response of the optimized gas sensor. Therefore, we demonstrated the possibility of sensing enhancement of metal oxides by ion implantation.
- URI
- https://www.sciencedirect.com/science/article/pii/S0925400520308200?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/171653
- ISSN
- 0925-4005
- DOI
- 10.1016/j.snb.2020.128475
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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