High Voltages in Sliding Water Drops

Water drops on insulating hydrophobic substrates can generate electric potentials of kilovolts upon sliding for a few centimeters. We show that the drop saturation voltage corresponds to an amplified value of the solid-liquid surface potential at the substrate. The amplification is given by the substrate geometry, the drop and substrate dielectric properties, and the Debye length within the liquid. Next to enabling an easy and low-cost way to measure surface- and zeta- potentials, the high drop voltages have implications for energy harvesting, droplet microfluidics, and electrostatic discharge protection.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:14

Enthalten in:

The journal of physical chemistry letters - 14(2023), 49 vom: 14. Dez., Seite 11110-11116

Sprache:

Englisch

Beteiligte Personen:

Bista, Pravash [VerfasserIn]
Ratschow, Aaron D [VerfasserIn]
Butt, Hans-Jürgen [VerfasserIn]
Weber, Stefan A L [VerfasserIn]

Links:

Volltext

Themen:

Journal Article

Anmerkungen:

Date Revised 20.12.2023

published: Print-Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.1021/acs.jpclett.3c02864

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM365429341