CuO nanowire gas sensors for air quality control in automotive cabin

Yoon Sung Kim, In Sung Hwang, Sun Jung Kim, Choong Yong Lee, Jong Heun Lee

Research output: Contribution to journalArticle

241 Citations (Scopus)

Abstract

CuO nanowires (NWs) were grown by the thermal oxidation of Cu foil at 400 °C and gas sensors were fabricated by the deposition of a solution containing the CuO NWs. At 300-370 °C, the sensor resistance increased upon exposure to 30-100 ppm CO. This has been explained by the gas sensing characteristics of the p-type oxide semiconductor. In contrast, the sensor showed two opposite NO2 sensing behaviors; the resistance decreased upon exposure to 30-100 ppm NO2, but increased upon contact with ≤5 ppm NO2. The increase in resistance upon contact with both reducing CO and a low concentration of oxidizing NO2 gases provides a simple and novel sensing algorithm for air quality control in automotive cabins.

Original languageEnglish
Pages (from-to)298-303
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume135
Issue number1
DOIs
Publication statusPublished - 2008 Dec 10

Keywords

  • Automobile ventilation
  • CO
  • CuO nanowires
  • NO
  • Thermal oxidation

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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