High Performance Colorimetric Carbon Monoxide Sensor for Continuous Personal Exposure Monitoring

Chenwen Lin, Xiaojun Xian, Xingcai Qin, Di Wang, Francis Tsow, Erica Forzani, Nongjian Tao

Research output: Contribution to journalArticlepeer-review

61 Scopus citations


Carbon monoxide (CO) is a highly poisonous gas, which can cause serious health risk. CO monitoring helps protect us from excessive exposure at home and in the workplace, and reduce occupation-related health risks for workers. Conventional electrochemical and metal oxide semiconductors (MOS) based CO sensors have been widely used, but the drawbacks such as poor selectivity and calibration burden also limit their applications, e.g., as wearable exposure monitors. Aiming at the reliable, miniaturized, and easy-to-use personal exposure device development, we report a colorimetric CO sensing platform, which achieves a detection limit of 1 ppm, dynamic range of 0-500 ppm, and high selectivity to CO over common interferents in air, such as CO2, NO2, SO2, and O3. This optical sensing platform can be expanded to other air pollutants by adding other chemical sensing probes. We believe the new sensing platform we introduced can provide a potential high performance sensing unit for wearable personal exposure assessment devices.

Original languageEnglish (US)
Pages (from-to)327-333
Number of pages7
JournalACS sensors
Issue number2
StatePublished - Feb 23 2018


  • carbon monoxide
  • colorimetry
  • gas sensor
  • personal exposure monitor
  • wearable device

ASJC Scopus subject areas

  • Bioengineering
  • Instrumentation
  • Process Chemistry and Technology
  • Fluid Flow and Transfer Processes


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