The present paper reports the use of diluted ferrofluid and two arrays of permanent magnets for the size-selective concentration of non-magnetic particles. The micro magnetofluidic device consists of a straight channels sandwiched between two arrays of permanent magnets. The permanent magnets create multiple capture zones with minimum magnetic field strength along the channel. The complex interaction between magnetic forces and hydrodynamic force allows the device to operate in different regimes suitable for concentration of non-magnetic particles with small difference in size. Our experimental results show that non-magnetic particles with diameters of 3.1 μm and 4.8 μm can be discriminated and separated with this method. The results from this study could be used as a guide for the design of size-sensitive separation devices for particle and cell based on negative magnetophoresis.
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July 2016
Research Article|
July 05 2016
Magnetofluidic concentration and separation of non-magnetic particles using two magnet arrays
Nam-Trung Nguyen
a)
Email: [email protected]. Tel.: +61 07 373 53921. Fax: +61 07 373 58021.
Biomicrofluidics 10, 044103 (2016)
Article history
Received:
May 24 2016
Accepted:
June 24 2016
Citation
Majid HejazianNam-Trung Nguyen; Magnetofluidic concentration and separation of non-magnetic particles using two magnet arrays. Biomicrofluidics 1 July 2016; 10 (4): 044103. https://doi.org/10.1063/1.4955421
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