A silicon dioxide microsphere (center) suspended by optical tweezers between copper electrodes used to measure its electric charge. Selected for a Synopsis in Physics Magazine and for an Editors’ Suggestion.

From the article:

Using Optical Tweezers to Simultaneously Trap, Charge, and Measure the Charge of a Microparticle in Air
Andrea Stoellner, Isaac C. D. Lenton, Artem G. Volosniev, James Millen, Renjiro Shibuya, Hisao Ishii, Dmytro Rak, Zhanybek Alpichshev, Grégory David, Ruth Signorell, Caroline Muller, and Scott Waitukaitis
Phys. Rev. Lett. 135, 218202 (2025)

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