title: Highly Sensitive and Fast Response Colorimetric Humidity Sensors Based on Graphene Oxides Film.
abstract: 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.
authors: Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543.
authors: Hong
authors: H
authors: Chi
authors: Institute of Materials Research and Engineering, A-STAR (Agency for Science, Technology and Research) , 3 Research Link, Singapore 117602.
authors: Yan Jun
authors: YJ
authors: Liu
authors: Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543.|Institute of Materials Research and Engineering, A-STAR (Agency for Science, Technology and Research) , 3 Research Link, Singapore 117602.
authors: FuKe
authors: F
authors: Wang
authors: Institute of Materials Research and Engineering, A-STAR (Agency for Science, Technology and Research) , 3 Research Link, Singapore 117602.|Department of Materials Science and Engineering, National University of Singapore , 9 Engineering Drive 1, Singapore 117576.
authors: Chaobin
authors: C
authors: He
mesh_terms: D003116:Color; D003124:Colorimetry; D006108:Graphite / Q000737:chemistry*; D006813:Humidity; D010087:Oxides / Q000737:chemistry; D014867:Water / Q000032:analysis*
chemical_list: D010087:Oxides; D014867:Water; D006108:Graphite
keywords: carbon; colorimetric; graphene oxide; humidity sensor; reflection