Investigation of Ag-Doping in Kinetically Sprayed SnO2 Composite Film and Its Application to Gas Sensor
- Title
- Investigation of Ag-Doping in Kinetically Sprayed SnO2 Composite Film and Its Application to Gas Sensor
- Author
- 이선영
- Keywords
- SnO2; Gas sensor; Silver nanoparticles; Kinetic spraying; In situ deposition
- Issue Date
- 2019-11
- Publisher
- 한국정밀공학회
- Citation
- International Journal of Precision Engineering and Manufacturing, v. 20, NO. 11, Page. 1989-1996
- Abstract
- We have developed a facile method to fabricate Ag-doped SnO2 composite film prepared via one-step kinetic spraying process. We used supersonic/subsonic nozzles to accelerate powders to their maximum kinetic energies when bombarding the substrates; no post-treatment was required. Under optimized conditions, sensors fabricated from SnO2-based films with and without Ag nanoparticles (NPs) were smooth and about 7 mu m in thickness. To improve CO-sensing performance, Ag NPs (to less than 1 wt%) were added to SnO2 films. The sensor response to CO of the film with 1 wt% Ag was up to 20-fold better than that of the Ag-free film, even a low CO concentration of 500 ppm. We thus confirmed that addition of a small amount of Ag NPs to a SnO2 film increased electron transport and improved catalysis of oxygen ionization on the film surface. Therefore, we have developed a facile method of Ag-doping in composite gas sensor and this crack-free composite gas sensor was found to be highly sensitive to CO gas.
- URI
- https://link.springer.com/article/10.1007%2Fs12541-019-00208-8https://repository.hanyang.ac.kr/handle/20.500.11754/181503
- ISSN
- 2234-7593;2005-4602
- DOI
- 10.1007/s12541-019-00208-8
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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