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http://dx.doi.org/10.3795/KSME-C.2015.3.3.217

In-situ Patterning of Magnetic Particles in Microfluidic Channels by Forward/Reverse Local Magnet Arrangement  

Park, Hyoun-Hyang (Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials)
Lee, Ji Hae (School of Mechanical and Aerospace Engineering, Hanbat Nat’l Univ.)
Yoo, Yeong Eun (Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials)
Kim, Jung-Yup (Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials)
Chang, Sunghwan (Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials)
Publication Information
Transactions of the KSME C: Technology and Education / v.3, no.3, 2015 , pp. 217-223 More about this Journal
Abstract
The patterning of microbead in microfluidics channel is a practical technique for application in bio and medical areas. An approach is described for a direct patterning of magnetically active microbeads in microfluidic devices without inner structure. Local magnet arrangements - flat arrangement and stack arrangement - contacting same poles or opposite poles of magnet were utilized for generating trapping magnetic fields. The arrangement of magnets contacting same poles generated isolated patterns by repelling of magnetic field. The flat arrangement of vertically reverse magnet arrays shaped trapping patterns repelling magnetic field line between same poles. Spatially, the stack compositions of magnet arrangements allow diverse isolated trapped patterns of magnetic particles. Trapped magnetic particles in fluidic channels were stable on the $18m{\ell}/hr$ flow conditions and magnetic force of 1.08 mT in the all experiments. This experimental study suggests the simple and versatile methods to pattern magnetic particles, and has potential of wide application to bio and medical area.
Keywords
Magnetic Particle Patterning; Forward Magnet Arrangement; Reverse Magnet Arrangement; Trapped Magnetic Particle;
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