Gas sensing properties of defect-induced single-walled carbon nanotubes
- Authors
- Kim, Jaeseong; Choi, Sun-Woo; Lee, Je-Haeng; Chung, Youngchul; Byun, Young Tae
- Issue Date
- 2016-06-02
- Publisher
- ELSEVIER SCIENCE SA
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.228, pp.688 - 692
- Abstract
- We report a method to induce defects on the surface of single-walled carbon nanotubes (SWNTs) in order to improve the gas-sensing properties of an SWNT-based sensor. In this approach, the surface of the SWNTs is physically modified by thermal treatment at high temperature. The fabricated SWNT-based sensors were subjected to rapid thermal annealing (RTA) over the temperature range of 300-800 degrees C. After the thermal treatment, the electrical resistances of the defect-induced SWNT sensors were measured and compared with those of pristine SWNT sensors. The gas sensing properties of the defect-induced SWNT sensors upon exposure to various gases such as NO2, NH3, and H-2 were measured at room temperature. The thermally treated SWNT-based sensors exhibited much higher sensitivity and recovery than the pristine sensors. These results indicate that the defect-induced SWNTs can improve the performance of SWNT-based sensors. (C) 2016 Elsevier B.V. All rights reserved.
- Keywords
- ADSORPTION; ADSORPTION; Single-walled carbon nanotubes; Defect funct ionalizat ion; NO2 gas; Sensors
- ISSN
- 0925-4005
- URI
- https://pubs.kist.re.kr/handle/201004/123974
- DOI
- 10.1016/j.snb.2016.01.094
- Appears in Collections:
- KIST Article > 2016
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