title: Fast response and high sensitivity ZnO/glass surface acoustic wave humidity sensors using graphene oxide sensing layer.
abstract: We report ZnO/glass surface acoustic wave (SAW) humidity sensors with high sensitivity and fast response using graphene oxide sensing layer. The frequency shift of the sensors is exponentially correlated to the humidity change, induced mainly by mass loading effect rather than the complex impedance change of the sensing layer. The SAW sensors show high sensitivity at a broad humidity range from 0.5%RH to 85%RH with < 1 sec rise time. The simple design and excellent stability of our GO-based SAW humidity sensors, complemented with full humidity range measurement, highlights their potential in a wide range of applications.
authors.affiliation: Dept. of Info. Sci. &Electric. Eng., Zhejiang University and Cyrus Tang Center for Sensor Materials and Applications, 38 Zheda Road, Hangzhou 310027, P.R. China.
authors.forename: Weipeng
authors.initials: W
authors.lastname: Xuan
authors.affiliation: Dept. of Info. Sci. &Electric. Eng., Zhejiang University and Cyrus Tang Center for Sensor Materials and Applications, 38 Zheda Road, Hangzhou 310027, P.R. China.
authors.forename: Mei
authors.initials: M
authors.lastname: He
authors.affiliation: Dept. of Info. Sci. &Electric. Eng., Zhejiang University and Cyrus Tang Center for Sensor Materials and Applications, 38 Zheda Road, Hangzhou 310027, P.R. China.
authors.forename: Nan
authors.initials: N
authors.lastname: Meng
authors.affiliation: Dept. of Info. Sci. &Electric. Eng., Zhejiang University and Cyrus Tang Center for Sensor Materials and Applications, 38 Zheda Road, Hangzhou 310027, P.R. China.
authors.forename: Xingli
authors.initials: X
authors.lastname: He
authors.affiliation: Dept. of Info. Sci. &Electric. Eng., Zhejiang University and Cyrus Tang Center for Sensor Materials and Applications, 38 Zheda Road, Hangzhou 310027, P.R. China.
authors.forename: Wenbo
authors.initials: W
authors.lastname: Wang
authors.affiliation: Dept. of Info. Sci. &Electric. Eng., Zhejiang University and Cyrus Tang Center for Sensor Materials and Applications, 38 Zheda Road, Hangzhou 310027, P.R. China.
authors.forename: Jinkai
authors.initials: J
authors.lastname: Chen
authors.affiliation: Dept. of Info. Sci. &Electric. Eng., Zhejiang University and Cyrus Tang Center for Sensor Materials and Applications, 38 Zheda Road, Hangzhou 310027, P.R. China.
authors.forename: Tianjin
authors.initials: T
authors.lastname: Shi
authors.affiliation: Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, United Kingdom.
authors.forename: Tawfique
authors.initials: T
authors.lastname: Hasan
authors.affiliation: MOE Key Lab. of Macromolecul. Synth. &Funct., Dept. of Polym. Sci. &Eng., Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Dept. of Info. Sci. &Electric. Eng., Zhejiang University and Cyrus Tang Center for Sensor Materials and Applications, 38 Zheda Road, Hangzhou 310027, P.R. China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Xu
authors.affiliation: 1] Inst. of Renew. Energ. &Environ. Technol., University of Bolton, Deane Road, Bolton BL3 5AB, United Kingdom [2] Dept. of Info. Sci. &Electric. Eng., Zhejiang University and Cyrus Tang Center for Sensor Materials and Applications, 38 Zheda Road, Hangzhou 310027, P.R. China.
authors.forename: J K
authors.initials: JK
authors.lastname: Luo