PM2.5 analysis in liquid phase via water film-based collection and microfluidics-based electrical detection

Toward evaluation of health risk of particulate matter with size less than or equal to 2.5 µm (PM2.5), we propose a methodology for realizing the PM2.5 analysis in liquid phase via water film-based collection and microfluidics-based electrical detection. A hydrophilic nanowire surface was utilized in the collection for forming a water film, which enabled continuous collection of air-floating PM2.5 into liquid phase and followed-by detection. The collected PM2.5 was electrically detected and analyzed via ionic current sensing with a micropore. We believe proposed PM2.5 analysis methodology in liquid phase would allow to realize health risk evaluation and reduce health damage.