Highly Sensitive and Fast Response Colorimetric Humidity Sensors Based on Graphene Oxides Film

被引：104

作者：

Chi, Hong ^{[1
]}

Liu, Yan Jun ^{[2
]}

Wang, FuKe ^{[1
,2
]}

He, Chaobin ^{[2
,3
]}

机构：

[1] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

[2] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore

[3] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117576, Singapore

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 36期

关键词：

humidity sensor; graphene oxide; colorimetric; reflection; carbon; SENSING PROPERTIES; WATER;

D O I：

10.1021/acsami.5b06883

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Uniform graphene oxide (GO) film for optical humidity sensing was fabricated by dip-coating technique. The resulting GO thin film shows linear optical shifts in the visible range with increase of humidity in the whole relative humidity range (from dry state to 98%). Moreover, GO films exhibit ultrafast sensing to moisture within 250 ms because of the unique atomic thinness and superpermeability of GO sheets. The humidity sensing mechanism was investigated using XRD and computer simulation. The ultrasensitive humidity colorimetric properties of GOs film may enable many potential applications such as disposable humidity sensors for packaging, health, and environmental monitoring.

引用

页码：19882 / 19886

页数：5

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