Air quality monitoring using mobile microscopy and machine learning

Light, Science & Applications
Yi-Chen WuAydogan Ozcan

Abstract

Rapid, accurate and high-throughput sizing and quantification of particulate matter (PM) in air is crucial for monitoring and improving air quality. In fact, particles in air with a diameter of ≤2.5 μm have been classified as carcinogenic by the World Health Organization. Here we present a field-portable cost-effective platform for high-throughput quantification of particulate matter using computational lens-free microscopy and machine-learning. This platform, termed c-Air, is also integrated with a smartphone application for device control and display of results. This mobile device rapidly screens 6.5 L of air in 30 s and generates microscopic images of the aerosols in air. It provides statistics of the particle size and density distribution with a sizing accuracy of ~93%. We tested this mobile platform by measuring the air quality at different indoor and outdoor environments and measurement times, and compared our results to those of an Environmental Protection Agency-approved device based on beta-attenuation monitoring, which showed strong correlation to c-Air measurements. Furthermore, we used c-Air to map the air quality around Los Angeles International Airport (LAX) over 24 h to confirm that the impact of LAX on increased...Continue Reading

References

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Feb 17, 2015·Nature Communications·Chong LiuYi Cui
Jun 30, 2016·Scientific Reports·Yichen WuAydogan Ozcan

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Citations

Sep 14, 2018·Cytometry. Part a : the Journal of the International Society for Analytical Cytology·Petra PaièAndrea Bassi
Nov 12, 2019·The Analyst·Sunho KimSung-Gyu Park
Jul 10, 2020·Lab on a Chip·Akihiro IsozakiKeisuke Goda
May 1, 2018·Advanced Materials·Shui-Jing TangYun-Feng Xiao
Mar 5, 2020·Light, Science & Applications·Rubaiya HussainValerio Pruneri
Mar 7, 2019·Light, Science & Applications·Xiao-Chong YuYun-Feng Xiao
Jun 30, 2019·Optics Express·Kevin Mallery, Jiarong Hong
Jun 4, 2020·Scientific Reports·Taesik GoSang Joon Lee
Jul 14, 2020·Microscopy Research and Technique·Soumyabrata BanikNirmal Mazumder
Feb 16, 2021·Analytical and Bioanalytical Chemistry·Soumyabrata BanikNirmal Mazumder
Feb 12, 2021·Light, Science & Applications·Rubaiya HussainValerio Pruneri
Sep 2, 2021·Annual Review of Biomedical Data Science·Xinyue ZhangMichael P Snyder
May 25, 2020··Chaker El AmraniMohamed Akram Zaytar

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Methods Mentioned

BETA
chip

Software Mentioned

Air
Matlab
CVX

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