Gas sensing by resistance fluctuations in PdxWO3 nanoparticle films

J. Ederth, J. M. Smulko, L. B. Kish, P. Heszler, G. Niklasson, C. Granqvist

Research output: Contribution to journalConference article


Nanoparticle films of PdxWO3, with x being 0.01 or 0.12, were made by dual-beam gas deposition. Resistance noise as well as dc resistance were measured during exposure to ethanol and hydrogen gas. For ethanol concentrations exceeding 50 ppm, changes in the resistance noise gave 300 times larger detection sensitivity than changes in the dc resistance. This sensitivity reached a maximum at 250°C and was very reproducible for ethanol sensing.

Original languageEnglish
Pages (from-to)191-199
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - Sep 13 2004
EventNoise and Information in Nanoelectronics, Sensors, and Standards II - Maspalomas
Duration: May 26 2004May 28 2004


  • Gas deposition
  • Gas detection
  • Gas sensors
  • Resistance fluctuations

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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