New type of gas sensor based on thermionic charge carrier emission

Tim Schwebel, Joachim Frank, Maximilian Fleischer, H. Meixner, Claus Dieter Kohl

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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
Pages (from-to)157-161
Number of pages5
JournalSensors and Actuators, B: Chemical
Volume68
Issue number1
DOIs
Publication statusPublished - Aug 25 2000

Fingerprint

thermionics
Chemical sensors
Charge carriers
charge carriers
Gases
sensors
gases
scandium oxides
Scandium
Electrons
Barium
Atmospheric pressure
barium
nitrates
Nitrates
atmospheric pressure
electron scattering
direct current
Vacuum
Ions

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

Cite this

New type of gas sensor based on thermionic charge carrier emission. / Schwebel, Tim; Frank, Joachim; Fleischer, Maximilian; Meixner, H.; Kohl, Claus Dieter.

In: Sensors and Actuators, B: Chemical, Vol. 68, No. 1, 25.08.2000, p. 157-161.

Research output: Contribution to journalArticle

Schwebel, Tim ; Frank, Joachim ; Fleischer, Maximilian ; Meixner, H. ; Kohl, Claus Dieter. / New type of gas sensor based on thermionic charge carrier emission. In: Sensors and Actuators, B: Chemical. 2000 ; Vol. 68, No. 1. pp. 157-161.
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