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Gas sensing mechanism of sulfur chain-encapsulated single-walled carbon nanotubes

Title
Gas sensing mechanism of sulfur chain-encapsulated single-walled carbon nanotubes
Author
이휘건
Keywords
Single-walled carbon nanotube; Sulfur; Atomic encapsulation; Charge transport; Gas-response
Issue Date
2019-08
Publisher
ELSEVIER SCIENCE SA
Citation
DIAMOND AND RELATED MATERIALS, v. 97, article no. 107474
Abstract
Atomic encapsulation inside single-walled carbon nanotubes (SWNT) has drawn notable attention recently due to the unique strength of an extremely confined, stable 1-dimensional structure. However, the charge transport characteristics of these SWNT species, particularly upon specific gas exposure, have not yet been elucidated. Herein, sulfur atoms are encapsulated inside the SWNT, and the electronic properties of sulfur chain-encapsulated SWNT (S@SWNT) are investigated. In addition, the current responses of both pristine and S@SWNT species upon exposure to gas molecules with distinctly opposite natures, oxygen and ammonia, are demonstrated under high vacuum conditions. While the same trends are observed with ammonia purging, oxygen purging induces opposite trends for the two species. Based on the comparison of gas responses between pristine SWNT and S@SWNT, the gas sensing mechanism of S@SWNT is proposed.
URI
https://www.sciencedirect.com/science/article/pii/S0925963519303498?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/152168
ISSN
0925-9635; 1879-0062
DOI
10.1016/j.diamond.2019.107474
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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