2020/03/10 by Fernando Martínez‐Pedrero, Martínez-Pedrero, Fernando, Francisco Ortega +5
Engineering · Materials Science · Physics and Astronomy · #Characterization and Applications of Magnetic Nanoparticles #FOS: Physical sciences #Micro and Nano Robotics #Pickering emulsions and particle stabilization #Soft Condensed Matter (cond-mat.soft)
paper · pdf · doi:10.48550/arxiv.2003.04594
openalex publication_date 2020/03/10 · openalex created_date 2022/07/23 · openalex updated_date 2026/07/28
The transport of motile entities across modulated energy landscapes plays an\nimportant role in a range of phenomena in biology, colloidal science and\nsolid-state physics. Here, an easily implementable strategy that allows for the\ncollective and monitored transport of microparticles at fluid-fluid interfaces\nis introduced. Adsorbed magnetic microparticles are carried on time-dependent\nmagnetic potentials, generated by a dynamic self-assembled lattice of\ndifferent-sized magnetic particles. In such binary systems, the sudden\nreorientation of the applied field triggers the rapid exchange between\nattractive and repulsive configurations, enabling for the ballistic transfer of\nthe carriers through the lattice. As the number of motile entities increases,\nthe induced current increases, before reaching a maximum, while the loaded\ninterface gradually displays bidirectional transport. The described methodology\ncan be tuned through the applied field and exploited for the monitored guidance\nof adsorbed molecules on liquid surfaces, the segregation of colloidal\nmixtures, the induced motion of defects in photonic crystals or the design of\nnew self-assembled microrobots.\n