Journal
MICROMACHINES
Volume 10, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/mi10110744
Keywords
negative magnetophoresis; paramagnetic solution; ferrofluid; particle deflection; particle focusing; particle enrichment; particle separation; particle medium exchange
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Funding
- NSF [CBET-1150670]
- Clemson University
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Magnetic field-induced particle manipulation is simple and economic as compared to other techniques (e.g., electric, acoustic, and optical) for lab-on-a-chip applications. However, traditional magnetic controls require the particles to be manipulated being magnetizable, which renders it necessary to magnetically label particles that are almost exclusively diamagnetic in nature. In the past decade, magnetic fluids including paramagnetic solutions and ferrofluids have been increasingly used in microfluidic devices to implement label-free manipulations of various types of particles (both synthetic and biological). We review herein the recent advances in this field with focus upon the continuous-flow particle manipulations. Specifically, we review the reported studies on the negative magnetophoresis-induced deflection, focusing, enrichment, separation, and medium exchange of diamagnetic particles in the continuous flow of magnetic fluids through microchannels.
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