聲懸浮全景掃描設備在氣溶膠粒徑測量上的應用 The application of panoramic scanning equipment with acoustic levitation on measuring the aerosol partical size
Aerosols are dispersed systems consisting of solid or liquid particles suspended in a gaseous medium, with particle diameters typically ranging from 0.01 to 10 micrometers. In this study, an acoustic levitation bubble layer was utilized to trap aerosol particles or fine particulates at ultrasonic nodes, enabling optical analysis of particle size. To stabilize the levitated samples, a specially designed Styrofoam-based carrier, nicknamed the “Aladdin’s Carpet,” was developed. Owing to its physical interaction with the acoustic field, the carrier can rotate while remaining levitated, allowing measurements to be taken from multiple orientations as the sample completes a full 360° rotation. This capability provides an alternative to conventional dynamic particle measurement methods, which often rely on transient particle motion.
In addition, recognizing that public curiosity often focus on the detection of plastic micro-particles, we developed a simplified qualitative detection system based on an Arduino UNO R3 module integrated with a BPW34 photodiode. This setup enables users to easily verify the presence of plastic micro-particles in environmental or laboratory samples, promoting broader accessibility to microplastic detection techniques.