On-Chip Chemiresistive Sensor Array for On-Road NOx Monitoring with Quantification

Hi Gyu Moon, Youngmo Jung, Beomju Shin, Young Geun Song, Jae Hun Kim, Taikjin Lee, Seok Lee, Seong Chan Jun, Richard B. Kaner, Chong Yun Kang, Chulki Kim

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


The adverse effects of air pollution on respiratory health make air quality monitoring with high spatial and temporal resolutions essential especially in cities. Despite considerable interest and efforts, the application of various types of sensors is considered immature owing to insufficient sensitivity and cross-interference under ambient conditions. Here, a fully integrated chemiresistive sensor array (CSA) with parts-per-trillion sensitivity is demonstrated with its application for on-road NOx monitoring. An analytical model is suggested to describe the kinetics of the sensor responses and quantify molecular binding affinities. Finally, the full characterization of the system is connected to implement on-road measurements on NOx vapor with quantification as its ultimate field application. The obtained results suggest that the CSA shows potential as an essential unit to realize an air-quality monitoring network with high spatial and temporal resolutions.

Original languageEnglish
Article number2002014
JournalAdvanced Science
Issue number22
Publication statusPublished - 2020 Nov 18

Bibliographical note

Publisher Copyright:
© 2020 The Authors. Published by Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Engineering(all)
  • Physics and Astronomy(all)


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