arXiv Open Access 2023

Surface charge deposition by moving drops reduces contact angles

Xiaomei Li Aaron D. Ratschow Steffen Hardt Hans-Jürgen Butt

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Abstrak

Slide electrification - the spontaneous charge separation by sliding water drops - can lead to an electrostatic potential of 1 kV and change drop motion substantially. To find out, how slide electrification influences the contact angles of moving drops, we analyzed the dynamic contact angles of aqueous drops sliding down tilted plates with insulated surfaces, grounded surfaces, and while grounding the drop. The observed decrease in dynamic contact angles at different salt concentrations is attributed to two effects: An electrocapillary reduction of contact angles caused by drop charging and a change in the free surface energy of the solid due to surface charging.

Topik & Kata Kunci

cond-mat.soft

Penulis (4)

Xiaomei Li

Aaron D. Ratschow

Steffen Hardt

Hans-Jürgen Butt

Format Sitasi

APA MLA BibTeX

Li, X., Ratschow, A.D., Hardt, S., Butt, H. (2023). Surface charge deposition by moving drops reduces contact angles. https://arxiv.org/abs/2304.13461

Akses Cepat

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Informasi Jurnal

Tahun Terbit: 2023
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓