Facile Strategy to Generate Charged Droplets with Desired Polarities
Yingxi Wang, Wenluan Zhang, Qiangqiang Sun, Shiji Lin, Sheng Sun, Xu Deng
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.
Topics & Concepts
ElectretContact electrificationSubstrate (aquarium)Chemical physicsMaterials scienceElectrosprayCharged particleElectrostaticsNanotechnologyContact angleWettingChemical engineeringChemistryIonTriboelectric effectComposite materialOrganic chemistryPhysical chemistryGeologyOceanographyEngineeringElectrohydrodynamics and Fluid DynamicsElectrowetting and Microfluidic TechnologiesSurface Modification and Superhydrophobicity