The influence of interfaces and interlayers on the gas sensitivity in work function type sensors

Bernhard Ostrick, Maximilian Fleischer, H. Meixner

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

It is known that barium carbonate can act as CO2 sensitive material in work function type gas sensors in ambient condition. The reaction is due to the formation of bicarbonate species at the surface. The cross-sensitivity to other acidic gases as NO2 was up to now regarded and described in terms of similar reactions on the carbonate surface. In this work it was found that the NO2 sensitivity is due to reactions on the back metalisation of the carbonate film. Using different layer systems different sensitivities can therefore be switched on and off according to the needs in special applications. The design of specialised sensor systems is possible on the base of the results found in this work.

Original languageEnglish
Pages (from-to)271-274
Number of pages4
JournalSensors and Actuators, B: Chemical
Volume95
Issue number1-3
DOIs
Publication statusPublished - Oct 15 2003

Fingerprint

Carbonates
interlayers
carbonates
Gases
sensors
Sensors
Bicarbonates
Chemical sensors
gases
Barium
sensitivity
barium
barium carbonate

Keywords

  • BaCO
  • CO
  • Kelvin probe
  • NiO
  • NO
  • Work function

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

Cite this

The influence of interfaces and interlayers on the gas sensitivity in work function type sensors. / Ostrick, Bernhard; Fleischer, Maximilian; Meixner, H.

In: Sensors and Actuators, B: Chemical, Vol. 95, No. 1-3, 15.10.2003, p. 271-274.

Research output: Contribution to journalArticle

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