Room-Temperature Humidity Sensing Using Graphene Oxide Thin Films

作     者：Gautam Naik Sridhar Krishnaswamy Gautam Naik;Sridhar Krishnaswamy

作者机构：Center for Quality Engineering Northwestern University Evanston USA 

出 版 物：《Graphene》 (石墨烯（英文）)

年 卷 期：2016年第5卷第1期

页      面：1-13页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Graphene Thin Film Sensor Humidity Hysteresis 

摘      要：In this article, we report on a room-temperature humidity sensing device using graphene oxide (GO) thin films synthesized by chemical exfoliation. Changes in the device conductivity are measured for varying relative humidity in the experimental chamber. Experiments are carried out for relative humidity varying from 30% to 95%. We observe a difference in the results obtained for low relative humidity (50%), and propose a sensing mechanism to explain this difference. Although the sensor exhibits some hysteresis at high relative humidities, a method to “reset the sensor is also proposed. The sensing device has high sensitivity and fast response time.