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.
Bibliographical noteFunding Information:
H.G.M. and Y.J. contributed equally to this work. This work was supported by the KIST Institutional Program (Project No. 2E30410 & 2E30520), the Global Top Project funded by the Korea Ministry of Environment (GT‐11‐F‐02‐002‐1), the Institute for Information & Communications Technology Promotion (IITP) grant funded by the Korean government (MSIP; Ministry of Science, ICT & Future Planning; No. 2019‐0‐00725), the National Research Council of Science & Technology (NST) grant by the Korea government (MSIP) (No. CAP‐17‐04‐KRISS), and the Korea Institute of Toxicology (KK‐2004).
© 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)
- Physics and Astronomy(all)