Low-cost reduced graphene oxide-based conductometric nitrogen dioxide-sensitive sensor on paper

Jukka Hassinen*, Jussi Kauppila, Jarkko Leiro, Anni Määttänen, Petri Ihalainen, Jouko Peltonen, Jukka Lukkari

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

30 Citations (Scopus)

Abstract

The fabrication concept for a low-cost sensor device using reduced graphene oxide (rGO) as the sensing material on a porous paper substrate is presented. The sensors were characterized using conductivity and capacitance measurements, atomic force microscopy and X-ray photoelectron spectroscopy. The effects of different reducing agents, graphene oxide (GO) flake size and film thickness were studied. The sensor was sensitive to NO2, and devices based on a thin (10-nm) hydrazine-reduced GO layer had the best sensitivity, reaching a 70 % reduction in resistance after 10 min of exposure to 10 ppm NO2. The sensitivity was high enough for the detection of sub-parts per million levels of NO2. Desorption of gas molecules, i.e. the recovery of the sensor, could be accelerated by UV irradiation. The structure and preparation of the sensor are simple and up-scalable, allowing their fabrication in bulk quantities, and the fabrication concept can be applied to other materials, too. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)3611-3617
Number of pages7
JournalANALYTICAL AND BIOANALYTICAL CHEMISTRY
Volume405
Issue number11
DOIs
Publication statusPublished - Apr 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • Gas sensor
  • Graphene
  • Nitrogen dioxide
  • Paper substrate
  • Printed electronics
  • Sensor fabrication

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