Control of droplet impact through magnetic actuation of surface microstructures

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

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.

• Jezik: Angleški jezik
• Ključne besede: magnetoactive elastomers, laser micromachining, wettability
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2023
• Št. strani: 10 str.
• Številčenje: Vol. 10, art. 2202471
• PID: 20.500.12556/RUL-168613
• UDK: 620.3
• ISSN pri članku: 2196-7350
• DOI: 10.1002/admi.202202471
• COBISS.SI-ID: 145255427
• Datum objave v RUL: 18.04.2025

Gradivo je del revije

• Naslov: Advanced materials interfaces
• Založnik: Wiley-VCH
• ISSN: 2196-7350
• COBISS.SI-ID: 522945561

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: magnetoaktivni elastomeri, lasersko strukturiranje, omočljivost