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

Yebyeol Kim, Tae Kyu An, Jiye Kim, Jihun Hwang, Seonuk Park, Sooji Nam, Hyojung Cha, Won Jeong Park, Jeong Min Baik, Chan Eon Park

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

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.

Original languageEnglish
Pages (from-to)4539-4544
Number of pages6
JournalJournal of Materials Chemistry C
Volume2
Issue number23
DOIs
StatePublished - 21 Jun 2014

Fingerprint

Dive into the research topics of 'A composite of a graphene oxide derivative as a novel sensing layer in an organic field-effect transistor'. Together they form a unique fingerprint.

Cite this