20.500.12556/RUL-152633 Magnetically actuated surface microstructures for efficient transport and tunable separation of droplets and solids Efficient transportation of droplets (≈10$^1$–10$^2$ μL) and small solid objects (≈10$^1$–10$^2$ mm$^3$) have important applications in many fields, such as microfluidics, lab-on-a-chip devices, drug delivery, etc. A novel multifunctional surface consisting of a periodic array of micro-lamellae from a soft magnetoactive elastomer on a plastic substrate is reported for these purposes. The physical origin of the propulsion is the bending of soft magnetic lamellae in nonuniform magnetic fields, which is also observed in uniform magnetic fields. The magnetoactive surface is fabricated using a facile and rapid method of laser ablation. The propulsion of items is realized using a four-pole rotating magnet. This results in a cyclic lamellar fringe motion over the microstructured surface and brings an advantage of easy reciprocation of transport by rotation reversal. Two modes of object transportation are identified: “pushing” mode for precise control of droplet and solid positioning and “bouncing” mode for heavier solid objects transportation. A water droplet of 5 μL or a glass sphere with a 2.1 mm diameter can be moved at a maximum speed of 60 mm s$^{–1}$. The multifunctionality of the proposed mechatronic platform is demonstrated on the examples of selective solid–liquid separation and droplet merging. magnetoresponsive surfaces laser micromachinings object transportations object separations magnetoactive elastomers magnetoaktivni elastomeri magnetno odzivne površine lasersko mikrostrukturiranje transport separacija true false true Angleški jezik Slovenski jezik Članek v reviji 2023-12-01 11:41:27 2023-12-01 11:41:28 2023-12-02 03:49:23 0000-00-00 00:00:00 2023 0 0 11 str. iss. 22, art. 2301000 Vol. 25 Nov. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.3 1438-1656 10.1002/adem.202301000 167150595 Adv_Eng_Mater_-_2023_-_Kravanja_-_Magnetically_Actuated_Surface_Microstructures_for_Efficient_Transport_and_Tunable.pdf Adv_Eng_Mater_-_2023_-_Kravanja_-_Magnetically_Actuated_Surface_Microstructures_for_Efficient_Transport_and_Tunable.pdf 1 31158E6F327BD5E4E304758F29E6FE1C 60c112f09da7a7f8abd9c73d731f2f861db6e2f7512b96e9cc0d0910e9c33ce4 8aee47e6-9036-11ee-b3b7-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178218 https://onlinelibrary.wiley.com/doi/10.1002/adem.202301000 0 524d196f-9036-11ee-b3b7-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178217 Fakulteta za strojništvo Fakulteta za matematiko in fiziko 0 0 0