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Laser Micromachining of Magnetoactive Elastomers as Enabling Technology for Magnetoresponsive Surfaces

  • A simple method for structuring of the surface of a magnetoactive elastomer (MAE) on the tens of micrometers scale, which capabilities extend beyond conventional mold-based polymer casting, is reported. The method relies on the ablation of the material by absorption of nanosecond infrared pulses from a commercial laser. It is shown that it is possible to fabricate parallel lamellar structures with a high aspect ratio (up to 6:1) as well as structures with complex scanning trajectories. The method is fast (fabrication time for the 7 × 7 mm2 is about 60 s), and the results are highly reproducible. To illustrate the capabilities of the fabrication method, both orthogonal to the MAE surface and tilted lamellar structures are fabricated. These magnetosensitive lamellae can be easily bent by ±45° using an external magnetic field of about 230 mT. It is demonstrated that this bending allows one to control the sliding angle of water droplets in a great range between a sticky (>90°) and a sliding state (<20°). Perspectives on employing this fabrication technology for magnetosensitive smart surfaces in microfluidic devices and soft robotics are discussed.

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Metadaten
Author:Gaia Kravanja, Inna A. Belyaeva, Luka Hribar, Irena Drevenšek-OlenikORCiD, Mikhail Shamonin (Chamonine)ORCiDGND, Matija Jezeršek
DOI:https://doi.org/10.1002/admt.202101045
Parent Title (English):Advanced Materials Technologies
Publisher:Wiley
Document Type:Article
Language:English
Year of first Publication:2021
Release Date:2022/01/27
Volume:7
Issue:5
Article Number:2101045
First Page:1
Last Page:8
Institutes:Fakultät Elektro- und Informationstechnik
Fakultät Elektro- und Informationstechnik / Labor Intelligente Materialien und Strukturen
Begutachtungsstatus:peer-reviewed
research focus:Produktion und Systeme
OpenAccess Publikationsweg:Hybrid Open Access - OA-Veröffentlichung in einer Subskriptionszeitschrift/-medium
Licence (German):Creative Commons - CC BY-NC-SA - Namensnennung - Nicht kommerziell - Weitergabe unter gleichen Bedingungen 4.0 International