期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 36, 页码 19882-19886出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b06883
关键词
humidity sensor; graphene oxide; colorimetric; reflection; carbon
资金
- Science and Engineering Research Council of Agency for Science, Technology and Research of Singapore [1325504107]
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.
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