ao0c04140_si_008.mp4 (1.13 MB)
Facile Strategy to Generate Charged Droplets with Desired Polarities
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posted on 2020-10-05, 21:04 authored by Yingxi Wang, Wenluan Zhang, Qiangqiang Sun, Shiji Lin, Sheng Sun, Xu DengWater
droplets are usually charged positively via either electrospray
or contact electrification at the solid/liquid interface. Herein,
we describe a facile two-step strategy to generate charged droplets
with desired polarities. In particular, negatively charged droplets
can be generated via electrostatic induction using a precharged superamphiphobic
substrate as an electret. The interplay of repulsive and attractive
interactions between like- and unlike-charged droplets or electret
leads to rapid droplet transport and self-assembly of specific highly
ordered arrays.