20.500.12556/RUL-105171 Magnetically driven omnidirectional artificial microswimmers We present an experimental realisation of two new artificial microswimmers that swim at low Reynolds number. The swimmers are externally driven with a periodically modulated magnetic field that induces an alternating attractive/repulsive interaction between the swimmer parts. The field sequence also modulates the drag on the swimmer components, making the working cycle non-reciprocal. The resulting net translational displacement leads to velocities of up to 2 micrometers per second. The swimmers can be made omnidirectional, meaning that the same magnetic field sequence can drive swimmers in any direction in the sample plane. Although the direction of their swimming is determined by the momentary orientation of the swimmer, their motion can be guided by solid boundaries. We demonstrate their omnidirectionality by letting them travel through a circular microfluidic channel. We use simple scaling arguments as well as more detailed numerical simulations to explain the measured velocity as a function of the actuation frequency. true false false Angleški jezik Angleški jezik Članek v reviji 2018-11-06 10:34:32 2018-11-06 10:34:33 2022-08-17 03:47:05 0000-00-00 00:00:00 2018 0 0 Str. 3415-3422 no. 17 Vol. 14 2018 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2019-04-10 53 1744-683X 10.1039/C8SM00230D 31360551 19616551 RAZ_Vilfan_Mojca_i2018.pdf RAZ_Vilfan_Mojca_i2018.pdf 1 8C12EE840951AD61684CC8D33767C860 e5e3ac9c3a57d4a950eb556d24e5be3a321d30891aed37cb2046cbe094d618df 21c19514-a1b6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=115775 Fakulteta za matematiko in fiziko 0 0 0