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A graphene oxide flexible sensor for humidity detection
Published:
18 September 2023
by MDPI
in The 2nd International Electronic Conference on Chemical Sensors and Analytical Chemistry
session Materials for Chemical Sensing
Abstract:
A flexible humidity sensor operating at room temperature was produced by direct drop casting of a graphene oxide (GO) water solution on a substrate of bimatted polyester, previously coated with inkjet-printed interdigitated electrodes in silver. The GO was synthesized by using a modified Hummers’ method, followed by an alkaline treatment with a water solution of KOH. Changes in the device resistance were measured for varying relative humidity in the range from 15% to 70% in a sealed stainless cell. The device showed high sensitivity, good repeatability, and fast recovery time. Being flexible and robust, the proposed sensors could be easily integrated into wearable equipment.
Keywords: graphene oxide; humidity sensors; flexible sensors; wearable devices