Laser-Induced Graphene on Chitosan: An Enabling Technology for Sustainable Resistive Humidity Sensors

Johanna Zikulnig*, Lukas Neumaier, Martin Lenzhofer, Sandro Carrara, Jurgen Kosel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The development and characterization of resistive humidity sensors based on Chitosan on a glass substrate is reported. The sensor electrodes are made of laser-induced graphene derived from Chitosan, which represents a sustainability advancement by eliminating the need for adding additional materials during fabrication. Depending on the sensor design, a high sensitivity can be achieved either in the lower or higher humidity range with a total operation span from 40 to 100% rH. Both sensors exhibit good stability, especially at high humidity levels (80% rH) over a 24-h cycle. The Chitosan-based sensors, hence, offer an excellent combination of sustainability and high performance, making them an attractive solution for countless humidity sensing applications.

Original languageEnglish (US)
Article number1501104
JournalIEEE Sensors Letters
Volume7
Issue number9
DOIs
StatePublished - Sep 1 2023

Keywords

  • chitosan
  • humidity sensing
  • laser-induced graphene (LIG)
  • Sensor phenomena
  • sustainable sensorics

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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