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3 October 2022 Measuring charging and discharging rates of isolated aerosol particles
Isaac C. D. Lenton, Andrea Stöllner, Scott R. Waitukaitis
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Proceedings Volume PC12198, Optical Trapping and Optical Micromanipulation XIX; PC121980P (2022) https://doi.org/10.1117/12.2635127
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States
Abstract
Using optical tweezers, we isolate individual aerosol particles in order to study their charging dynamics. Preliminary results suggest that the rate at which particles charge depends on material, surface area, and most importantly, the humidity of the surrounding air. We hypothesize that charging occurs due to preferential adsorption/desorption of OH- or H+ ions. Further still, when we artificially increase the number of ions surrounding our particle, we observe rapid discharging. These results could have important implications to numerous fields including cloud formation and dust storm electrification, through to pollination; anywhere micro-particle charging plays a crucial role.
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Isaac C. D. Lenton, Andrea Stöllner, and Scott R. Waitukaitis "Measuring charging and discharging rates of isolated aerosol particles", Proc. SPIE PC12198, Optical Trapping and Optical Micromanipulation XIX, PC121980P (3 October 2022); https://doi.org/10.1117/12.2635127
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KEYWORDS
Atmospheric particles
Aerosols
Ions
Liquids
Optical tweezers
Solids
Electric field sensors
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