Matija Jezeršek (Author), Raphael Kriegl (Author), Gaia Kravanja (Author), Luka Hribar (Author), Irena Drevenšek Olenik (Author), Heiko Unold (Author), Mikhail Shamonin (Author)

Abstract

An effective method for on-demand control over the impact dynamics of droplets on a magnetoresponsive surface is reported. The surface is comprised of micrometer-sized lamellas from a magnetoactive elastomer on a copper substrate. The surface itself is fabricated using laser micromachining. The orientation of the lamellae is switched from edge-on (orthogonal to the surface) to face-on (parallel to the surface) by changing the direction of a moderate (<250 mT) magnetic field. This simple actuation technique can significantly change the critical velocities of droplet rebound, deposition, and splashing. Rebound and deposition regimes can be switched up to Weber number We < 13 ± 3, while deposition and splashing can be switched in the range of 32 < We < 52. Because a permanent magnet is used, no permanent power supply is required for maintaining the particular regime of droplet impact. The presented technology is highly flexible and enables selective fabrication and actuation of microstructures on complex devices. It has great potential for applications in soft robotics, microfluidics, and advanced thermal management.

Keywords

magnetoaktivni elastomeri;lasersko strukturiranje;omočljivost;magnetoactive elastomers;laser micromachining;wettability;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FMF - Faculty of Mathematics and Physics
UDC: 620.3
COBISS: 145255427 Link will open in a new window
ISSN: 2196-7350
Views: 72
Downloads: 19
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Other data

Secondary language: Slovenian
Secondary keywords: magnetoaktivni elastomeri;lasersko strukturiranje;omočljivost;
Type (COBISS): Article
Pages: 10 str.
Volume: ǂVol. ǂ10
Issue: ǂart. no. ǂ2202471
Chronology: Apr. 2023
DOI: 10.1002/admi.202202471
ID: 26235618