Practical chemical sensors from chemically derived graphene

Jesse D. Fowler, Matthew J. Allen, Chun-Chih Tung, Yang Yang, Richard B. Kaner, Bruce H. Weiller

Research output: Contribution to journalArticlepeer-review

1160 Scopus citations

Abstract

We report the development of useful chemical sensors from chemically converted graphene dispersions using spin coating to create single-layer films on interdigitated electrode arrays. Dispersions of graphene in anhydrous hydrazine are formed from graphite oxide. Preliminary results are presented on the detection of NO 2, NH 3, and 2,4-dinitrotoluene using this simple and scalable fabrication method for practical devices. Current versus voltage curves are linear and ohmic in all cases, studied independent of metal electrode or presence of analytes. The sensor response is consistent with a charge transfer mechanism between the analyte and graphene with a limited role of the electrical contacts. A micro hot plate sensor substrate is also used to monitor the temperature dependence of the response to nitrogen dioxide. The results are discussed in light of recent literature on carbon nanotube and graphene sensors.

Original languageEnglish (US)
Pages (from-to)301-306
Number of pages6
JournalACS Nano
Volume3
Issue number2
DOIs
StatePublished - Feb 24 2009

Keywords

  • 2,4-dinitrotoluene
  • Ammonia
  • Hydrazine
  • Micro hot plate
  • Nitrogen dioxide

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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