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학술지 Flexible Room-Temperature NO2 Gas Sensors Based on Carbon Nanotubes/Reduced Graphene Hybrid Films
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저자
정후영, 이대식, 최홍규, 이덕현, Ji-Eun Kim, Jeong Yong Lee, Won Jong Lee, Sang Ouk Kim, 최성율
발행일
201012
출처
Applied Physics Letters, v.96 no.21, pp.1-3
ISSN
0003-6951
출판사
American Institute of Physics (AIP)
DOI
https://dx.doi.org/10.1063/1.3432446
협약과제
10ZE1100, ETRI 연구역량 강화를 위한 R&D체계 구축 및 Seed형 기술개발을 위한 창의형 연구 사업, 현창희
초록
We present a flexible room temperature NO2 gas sensor consisting of vertical carbon nanotubes (CNTs)/reduced graphene hybrid film supported by a polyimide substrate. The reduced graphene film alone showed a negligible sensor response, exhibiting abnormal N-P transitions during the initial NO2 injection. A hybrid film, formed by the growth of a vertically aligned CNT array (with CNTs 20 μm in length) on the reduced graphene film surface, exhibited remarkably enhanced sensitivities with weak N-P transitions. The increase in sensitivity was mainly attributed to the high sensitivity of the CNT arrays. The outstanding flexibility of the reduced graphene films ensured stable sensing performances in devices submitted to extreme bending stress. © 2010 American Institute of Physics.
KSP 제안 키워드
Carbon nano-tube(CNT), Film surface, Graphene hybrid, High Sensitivity, Hybrid films, Polyimide substrate, Reduced graphene, Room-temperature, Sensor response, Vertically aligned CNT, aligned CNT array