Novel carbon dioxide microsensor based on tin oxide nanomaterial doped with copper oxide

Jennifer C. Xu, Gary W. Hunter, Dorothy Lukco, Chung Chiun Liu, Benjamin J. Ward

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Carbon dioxide CO2 is one of the major indicators of fire and therefore its measurement is very important for low-false-alarm fire detection and emissions monitoring. However, only a limited number of CO2 sensing materials exist due to the high chemical stability of CO2. In this work, a novel CO2 microsensor based on nanocrystalline tin oxide & SnO2 doped with copper oxide (CuO) has been successfully demonstrated. The CuO- SnO2 based CO2 microsensors are fabricated by means of microelectromechanical systems technology and sol-gel nanomaterial-synthesis processes. At a doping level of CuO SnO2 =1:8 (molar ratio), the resistance of the sensor has a linear response to CO 2 concentrations for the range of 1% to 4% CO2 in air at 450 C. This approach has demonstrated the use of SnO2, typically used for the detection of reducing gases, in the detection of an oxidizing gas.

Original languageEnglish
Article number4781939
Pages (from-to)235-236
Number of pages2
JournalIEEE Sensors Journal
Volume9
Issue number3
DOIs
StatePublished - Mar 2009

Keywords

  • Carbon dioxide CO
  • Copper oxide (CuO)
  • Microsensor
  • Nanomaterial
  • Tin oxide (SnO

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