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A composite of a graphene oxide derivative as a novel sensing layer in an organic field-effect transistor

Title
A composite of a graphene oxide derivative as a novel sensing layer in an organic field-effect transistor
Authors
Kim, Yebyeol김, 예별
Date Issued
8-Apr-2014
Publisher
Royal Society of Chemistry
Abstract
We report the fabrication of a gas sensor with an oleylamine-modified graphene oxide (OA-GO)/poly(9-9′-dioctyl-fluorene-co-bithiophene) (F8T2) composite as an active layer and demonstrate that it has better sensing ability than a comparable device with an F8T2-only active layer. OA-GO was chosen as the receptor material because of its enhanced interaction with gas analytes and its easy mixing with F8T2. OA-GO was synthesized by a simple condensation reaction between GO and oleylamine (9-octadecylamine), and characterized by Fourier transform infrared spectroscopy. The sensitivities of the gas sensors with respect to acetone and ethanol analytes were investigated by measuring the electrical parameters of the corresponding organic field effect transistor at room temperature. The sensitivity of the OA-GO/F8T2 composite device was up to 34 times that of the F8T2 device for the mobility change of acetone.
Keywords
graphene
URI
http://oasis.postech.ac.kr/handle/2014.oak/9095
DOI
http://dx.doi.org/10.1039/C4TC00376D
ISSN
2050-7526
2050-7534
Article Type
Article
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