New type of gas sensor based on thermionic charge carrier emission

Tim Schwebel, Joachim Frank, Maximilian Fleischer, Hans Meixner, Claus Dieter Kohl

Research output: Contribution to journalArticle

6 Citations (Scopus)


This paper presents investigations on DC emission currents from heated surfaces at ambient pressure for the purpose of gas sensing. Since applied gases alter the work function (WF) of a material, the emitted electron current changes and becomes gas sensitive. Gas sensitive effects were identified as being dependent upon the emission material used. In contrast to vacuum conditions, additional effects arise from interactions among electrons, ions and atoms. Consequently, the electrical behaviour at atmospheric pressure is completely different. This paper presents preliminary results on this new gas sensing principle with materials such as barium nitrate and scandium oxide.

Original languageEnglish
Article number3424
Pages (from-to)157-161
Number of pages5
JournalSensors and Actuators, B: Chemical
Issue number1
Publication statusPublished - Jan 1 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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