Printable fused silica based microchamber integrated with graphene chemi-resistive sensors for direct on-chip soil testing

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, we demonstrate a graphene-based portable gas sensor with an integrated fused silica micro chamber for direct on-chip sample injection to detect a low concentration (∼10 ppm) of acetone from a soil sample at room temperature and pressure. A chemiresistive gas sensor was first fabricated by a conformal transfer process using a commercial monolayer graphene film. Printable fused silica micro gas chamber (internal volume of 50 microliter), fabricated separately, was permanently attached with the graphene chemiresistor using an ultra-violet light source. A relative resistance change of 1% (∼20 ppm of acetone) was achieved by injection of a headspace sample for acetone calibration. This direct on-chip injection method shows an excellent potential for detecting volatile organic compounds from a soil sample without requiring complex sample extraction steps.

Original languageEnglish
Title of host publicationProceedings of the IEEE Applied Sensing Conference, APSCON 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages3
ISBN (Electronic)9781665461634
ISBN (Print)9781665461641
DOIs
Publication statusPublished - 17 Apr 2023
EventIEEE Applied Sensing Conference 2023 - Bengaluru, India
Duration: 23 Jan 202325 Apr 2023

Publication series

NameIEEE Applied Sensing Conference (APSCON): Proceedings

Conference

ConferenceIEEE Applied Sensing Conference 2023
Abbreviated titleAPSCON 2023
Country/TerritoryIndia
CityBengaluru
Period23/01/202325/04/2023

Keywords

  • graphene chemi-resistor ,
  • soil testing
  • Direct injection vapor sensing
  • Printable glass chamber

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