Chemically modified graphene/PEDOT:PSS nanocomposite films for hydrogen gas sensing

Title
Chemically modified graphene/PEDOT:PSS nanocomposite films for hydrogen gas sensing
Authors
정양이덕희구혜영맹성렬
Issue Date
2015-01
Publisher
Carbon
Citation
VOL 81, 54-62
Abstract
In this study, we report the preparation of chemically modified graphene/(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) nanocomposites and their application in hydrogen (H2) gas sensing materials. The aqueous dispersions of graphene oxide (GO) and reduced graphene oxide (rGO) nanosheets were synthesized and further doped into the solution of PEDOT:PSS in dimethylsulfoxide (DMSO). Both the GO/PEDOT:PSS and rGO/PEDOT:PSS composite devices showed a decrease in the resistance upon hydrogen exposure at room temperature. The GO/PEDOT:PSS, a strong p-type material, formed by rectifying contact with tungsten was evaluated for the H2 gas sensing and identified as a contact-controlled type. The rGO/PEDOT:PSS, a weak n-type material, forming an ohmic contact with tungsten was investigated for its H2 gas sensing and identified as a body-controlled type.
URI
http://pubs.kist.re.kr/handle/201004/49341
ISSN
00086223
Appears in Collections:
KIST Publication > Article
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