Control of Droplet Impact through Magnetic Actuation of Surface Microstructures
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....
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-04-01
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| Series: | Advanced Materials Interfaces |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/admi.202202471 |
| _version_ | 1797772393177939968 |
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| author | Matija Jezeršek Raphael Kriegl Gaia Kravanja Luka Hribar Irena Drevenšek‐Olenik Heiko Unold Mikhail Shamonin |
| author_facet | Matija Jezeršek Raphael Kriegl Gaia Kravanja Luka Hribar Irena Drevenšek‐Olenik Heiko Unold Mikhail Shamonin |
| author_sort | Matija Jezeršek |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-12T21:51:11Z |
| format | Article |
| id | doaj.art-6ae52bfa8b0a46f794f80e21c9127686 |
| institution | Directory Open Access Journal |
| issn | 2196-7350 |
| language | English |
| last_indexed | 2024-03-12T21:51:11Z |
| publishDate | 2023-04-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj.art-6ae52bfa8b0a46f794f80e21c91276862023-07-26T01:40:38ZengWiley-VCHAdvanced Materials Interfaces2196-73502023-04-011011n/an/a10.1002/admi.202202471Control of Droplet Impact through Magnetic Actuation of Surface MicrostructuresMatija Jezeršek0Raphael Kriegl1Gaia Kravanja2Luka Hribar3Irena Drevenšek‐Olenik4Heiko Unold5Mikhail Shamonin6University of Ljubljana Faculty of Mechanical Engineering Aškerčeva 6 Ljubljana SI‐1000 SloveniaFaculty of Electrical Engineering and Information Technology Ostbayerische Technische Hochschule (OTH) Regensburg Seybothstr. 2 93053 Regensburg GermanyUniversity of Ljubljana Faculty of Mechanical Engineering Aškerčeva 6 Ljubljana SI‐1000 SloveniaUniversity of Ljubljana Faculty of Mechanical Engineering Aškerčeva 6 Ljubljana SI‐1000 SloveniaUniversity of Ljubljana Faculty of Mathematics and Physics Jadranska 19 Ljubljana SI‐1000 SloveniaFaculty of Electrical Engineering and Information Technology Ostbayerische Technische Hochschule (OTH) Regensburg Seybothstr. 2 93053 Regensburg GermanyFaculty of Electrical Engineering and Information Technology Ostbayerische Technische Hochschule (OTH) Regensburg Seybothstr. 2 93053 Regensburg GermanyAbstract 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.https://doi.org/10.1002/admi.202202471laser micromachiningmagnetically responsive structuremagnetoactive elastomertunable droplet impacttunable wettability |
| spellingShingle | Matija Jezeršek Raphael Kriegl Gaia Kravanja Luka Hribar Irena Drevenšek‐Olenik Heiko Unold Mikhail Shamonin Control of Droplet Impact through Magnetic Actuation of Surface Microstructures Advanced Materials Interfaces laser micromachining magnetically responsive structure magnetoactive elastomer tunable droplet impact tunable wettability |
| title | Control of Droplet Impact through Magnetic Actuation of Surface Microstructures |
| title_full | Control of Droplet Impact through Magnetic Actuation of Surface Microstructures |
| title_fullStr | Control of Droplet Impact through Magnetic Actuation of Surface Microstructures |
| title_full_unstemmed | Control of Droplet Impact through Magnetic Actuation of Surface Microstructures |
| title_short | Control of Droplet Impact through Magnetic Actuation of Surface Microstructures |
| title_sort | control of droplet impact through magnetic actuation of surface microstructures |
| topic | laser micromachining magnetically responsive structure magnetoactive elastomer tunable droplet impact tunable wettability |
| url | https://doi.org/10.1002/admi.202202471 |
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