Facile Strategy to Generate Charged Droplets with Desired Polarities

Yingxi Wang; Wenluan Zhang; Qiangqiang Sun; Shiji Lin; Sheng Sun; Xu Deng

doi:10.1021/acsomega.0c04140

Facile Strategy to Generate Charged Droplets with Desired Polarities

ACS Omega. 2020 Oct 5;5(41):26908-26913. doi: 10.1021/acsomega.0c04140. eCollection 2020 Oct 20.

Authors

Yingxi Wang¹, Wenluan Zhang^{1

2}, Qiangqiang Sun¹, Shiji Lin³, Sheng Sun⁴, Xu Deng¹

Affiliations

¹ Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China.
² School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.
³ School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China.
⁴ School of Electronic Science and Engineering University of Electronic Science and Technology of China, Chengdu 610054, China.

Abstract

Water 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.