Low-cost hydrogen sulfide gas sensor on paper substrates: Fabrication and demonstration

Jawad Sarfraz*, Daniel Tobjork, Ronald Osterbacka, Mika Linden

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

31 Citations (Scopus)

Abstract

Drop-cast deprotonated emeraldine base (poly)aniline (PANI)copper chloride films on paper substrates containing ink-jet printed silver electrodes have been prepared and are shown to be promising low-cost gas-sensors for H 2S at room temperature. These films showed large changes in the conductivity (three to four orders of magnitude) upon exposure to low concentrations of H 2S (10 ppm) due to the formation of CuS and concurrent protonation of PANI. This large response of the sensor can be explained by the relatively large roughness and porosity of this paper substrate. Furthermore, the minimum resistances are low enough to allow light emitting diode lamps to be switched on using a low-voltage battery, thus serving as a proof-of-concept for mass-produced H 2S-sensors for, for example, the food packaging industry.

Original languageEnglish
Article number6112168
Pages (from-to)1973-1978
Number of pages6
JournalIEEE Sensors Journal
Volume12
Issue number6
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • Gas sensor
  • hydrogen sulfide
  • paper substrate
  • polyaniline
  • sensor demonstration

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