A Novel Microfluidics-based SAW Sensor for Ultrafine Particle Detection

Thilhara Tennakoon, Tsz Wai Lai, Sau Chung Fu, Ka Chung Chan, Chili Wu, Christopher Yu Hang Chao, Chun Ho Liu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Portable sensors are valuable tools for ultrafine particle (UFP) monitoring as they allow for real-time measurements in various environments. At the forefront of portable UFP monitoring, are lab-on-a-chip devices that use surface acoustic waves (SAW) to measure aerosol concentration. However, existing SAW-based UFP detectors rely on the accumulation of particulate matter on the sensor’s active surface, which makes them unsuitable for in-flow measurements. In this work, we suggest the integration of microfluidics to enable continuous monitoring. With particles actively flowing through the sensitive region, the limitation of standard SAW UFP sensors is overcome. Results indicate that the sensor can provide information not only on the concentration of particles, but also their size.

Original languageEnglish
Title of host publication18th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2024 - Conference Program and Proceedings
PublisherInternational Society of Indoor Air Quality and Climate
ISBN (Electronic)9798331306816
Publication statusPublished - Jul 2024
Event18th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2024 - Honolulu, United States
Duration: 7 Jul 202411 Jul 2024

Publication series

Name18th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2024 - Conference Program and Proceedings

Conference

Conference18th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2024
Country/TerritoryUnited States
CityHonolulu
Period7/07/2411/07/24

Keywords

  • Air quality monitoring
  • lab-on-a-chip
  • microfluidics
  • particulate matter
  • SAW

ASJC Scopus subject areas

  • Pollution

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