Development of an NO2 Gas Sensor Based on Laser-Induced Graphene Operating at Room Temperature

Gizem Soydan, Ali Fuat Ergenc, Ahmet T. Alpas, Nuri Solak*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A novel, in situ, low-cost and facile method has been developed to fabricate flexible NO2 sensors capable of operating at ambient temperature, addressing the urgent need for monitoring this toxic gas. This technique involves the synthesis of highly porous structures, as well as the specific development of laser-induced graphene (LIG) and its heterostructures with SnO2, all through laser scribing. The morphology, phases, and compositions of the sensors were analyzed using scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy. The effects of SnO2 addition on structural and sensor properties were investigated. Gas-sensing measurements were conducted at room temperature with NO2 concentrations ranging from 50 to 10 ppm. LIG and LIG/SnO2 sensors exhibited distinct trends in response to NO2, and the gas-sensing mechanism was elucidated. Overall, this study demonstrates the feasibility of utilizing LIG and LIG/SnO2 heterostructures in gas-sensing applications at ambient temperatures, underscoring their broad potential across diverse fields.

Original languageEnglish
Article number3217
JournalSensors
Volume24
Issue number10
DOIs
Publication statusPublished - May 2024

Bibliographical note

Publisher Copyright:
© 2024 by the authors.

Keywords

  • environmental monitoring
  • laser scribing
  • laser-induced graphene
  • NO gas sensor
  • room temperature gas sensing
  • SnO

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