Gas sensing properties of defect-induced single-walled carbon nanotubes

Authors
Kim, JaeseongChoi, Sun-WooLee, Je-HaengChung, YoungchulByun, 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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