Highly sensitive and wearable gas sensors consisting of chemically functionalized graphene oxide assembled on cotton yarn

Highly sensitive and wearable chemical sensors for the detection of toxic gas molecules are given significant attention for a variety of applications in human health care and environmental safety. Herein, we demonstrated fiber-type gas sensors based on graphene oxide functionalized with organic mole...

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Bibliographic Details
Published in:RSC advances 2018-03, Vol.8 (22), p.11991-11996
Main Authors: Kang, Min-A, Ji, Seulgi, Kim, Seongjun, Park, Chong-Yun, Myung, Sung, Song, Wooseok, Lee, Sun Sook, Lim, Jongsun, An, Ki-Seok
Format: Article
Language:English
Subjects:
Chemical sensors
Chemistry
Cotton
Functional groups
Gas sensors
Graphene
Organic chemistry
Piperidine
Sensors
Surface stability
Wearable technology
Yarn
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Summary:Highly sensitive and wearable chemical sensors for the detection of toxic gas molecules are given significant attention for a variety of applications in human health care and environmental safety. Herein, we demonstrated fiber-type gas sensors based on graphene oxide functionalized with organic molecules such as heptafluorobutylamine (HFBA), 1-(2-methoxyphenyl)piperazine (MPP), and 4-(2-keto-1-benzimidazolinyl)piperidine (KBIP) by assembling functionalized graphene oxide (FGO) on a single yarn fabric. These gas sensors of FGO on yarn exhibited extraordinarily higher sensitivity upon exposure to gas molecules than chemically reduced graphene oxide due to many active functional groups on the GO surface. Furthermore, the mechanical stability and chemical durability of the resulting gas sensors are well-maintained. Based on these results, we expected that our sensors with high sensitive and wearability will provide a good premise for wearable chemical sensors-based multidisciplinary applications. Functionalized-graphene-oxide-based gas sensors with KBIP-GO-Y showed extremely high sensitivity (∼70%) for exposure to gas molecules compared with rGO-based sensors (∼12%) in spite of relatively low gas concentrations (8 ppm NH 3 gas).
ISSN:2046-2069
2046-2069
DOI:10.1039/c8ra01184b