Fast Response and High Sensitivity ZnO/glass Surface Acoustic Wave Humidity Sensors Using Graphene Oxide Sensing Layer

Overview

Journal Sci Rep

Specialty Science

Date 2014 Nov 27

PMID 25425458

Citations 26

Authors

Weipeng Xuan

Mei He

Nan Meng

Xingli He

Wenbo Wang

Jinkai Chen

Tianjin Shi

Tawfique Hasan

Zhen Xu

Yang Xu

J K Luo

Affiliations

Soon will be listed here.

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.

Citing Articles

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