Magnetic Strategies for Non-Magnetic Particle Control in Surface and Microchannel Environments

DIGÓN, M.A.; GONZALEZ, E.A.; CHILIOTTE, C.E.; LLERA, M.A.; JORGE, G.A.

Conferencia; Transport Phenomena and Fluctuations in Small Complex Systems; 2023

Our investigation explores the domain of magnetic particle behavior in aqueous environments when subjected to external excitations. It examines the dynamics and self-organization of these systems, particularly in response to time-dependent excitations, which have profound implications in both fundamental physics and practical applications.To explore this domain, the study adopts an innovative method, utilizing three Helmholtz coils to create elliptically polarized magnetic fields. These fields are harnessed to manipulate micrometer-sized nickel and iron particles positioned at the base of a container filled with an aqueous medium. An analysis of video-microscopy images is conducted to scrutinize the time-dependent displacement patterns of these particles.We observed the emergence of chain structures referred to as 'rollers.' These formations exhibit controllable movement along the vessel's bottom plane in response to the applied magnetic field. Moreover, the introduction of glass microspheres into the system induces motion due to the displacement and drag exerted by these magnetic structures.This phenomenon opens up new avenues for particle manipulation. We demonstrates successful control of the movement of glass beads within these microchannels, presenting exciting prospects for targeted cargo delivery using this effective magnetic approach.