2022/01/25 by F. Chioma Onyeagusi, Jens Teiser, Niclas Schneider +1 · 1 citation
Physics and Astronomy · #physics.ins-det #astro-ph.IM #physics.app-ph
paper · pdf · doi:10.1016/j.elstat.2021.103637
published as Journal of Electrostatics 115 (2022) 103637
arxiv created 2022/01/25 · arxiv updated 2022/02/07
We present a method for measurements of electric dipole moments on (sub)-mm size (basalt) particles levitated in an acoustic trap and centered within a plate capacitor. If an electric field is applied the particles oscillate with specific frequencies due to their permanent dipole moments. We observe dipole moments on the order of DP = 10-15 ... 10-14 \rm C m . The dipole moment increases in small aggregates with the number of grains and is larger for samples vibrated (tribocharged) before trapping. The basalt grains show no sign of change in their dipole moment during measurements, implying a timescale for charge mobility being at least larger than minutes.