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Magnetic nanoparticles trapped by micro-coils in a microfluidic device are illustrated. (a) The whole chip. (b) Injection of particles. (c) Beads trapped with coils. Reprinted with permission from O. Lefebvre, et al., 2020 Micromachines 11(3), 257 [96] under the terms and conditions of the Creative Commons Attribution (CC BY) license http://creativecommons.org/licenses/by/4.0/, accessed on 28 June 2021. Copyright 2020 MDPI.
