Inverted Linear Halbach Array for Separation of Magnetic Nanoparticles

Title:
Inverted Linear Halbach Array for Separation of Magnetic Nanoparticles
Authors:
Ijiri, Yumi; Poudel, Chetan; Williams, P. Stephen; Moore, Lee R.; Orita, Toru; Zborowski, Maciej
Abstract:
A linear array of Nd-Fe-B magnets has been designed and constructed in an inverted Halbach configuration for use in separating magnetic nanoparticles. The array provides a large region of relatively low magnetic field, yet high magnetic field gradient in agreement with finite element modeling calculations. The magnet assembly has been combined with a flow channel for magnetic nanoparticle suspensions, such that for an appropriate distance away from the assembly, nanoparticles of higher moment aggregate and accumulate against the channel wall, with lower moment nanoparticles flowing unaffected. The device is demonstrated for iron oxide nanoparticles with diameters of ~5 and 20 nm. In comparison to other approaches, the inverted Halbach array is more amenable to modeling and to scaling up to preparative quantities of particles.
Citation:
Yumi Ijiri, Chetan Poudel, P. Stephen Williams, Lee R. Moore, Toru Orita, and Maciej Zborowski. 2013. "Inverted Linear Halbach Array for Separation of Magnetic Nanoparticles." IEEE Transactions on Magnetics 49(7): 3449-3452.
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
DATE ISSUED:
2013-07
Department:
Physics and Astronomy
Type:
article
PUBLISHED VERSION:
10.1109/TMAG.2013.2244577
PERMANENT LINK:
http://hdl.handle.net/11282/309699

Full metadata record

DC FieldValue Language
dc.contributor.authorIjiri, Yumien_US
dc.contributor.authorPoudel, Chetanen_US
dc.contributor.authorWilliams, P. Stephenen_US
dc.contributor.authorMoore, Lee R.en_US
dc.contributor.authorOrita, Toruen_US
dc.contributor.authorZborowski, Maciejen_US
dc.date.accessioned2013-12-23T16:15:43Z-
dc.date.available2013-12-23T16:15:43Z-
dc.date.issued2013-07en
dc.identifier.citationYumi Ijiri, Chetan Poudel, P. Stephen Williams, Lee R. Moore, Toru Orita, and Maciej Zborowski. 2013. "Inverted Linear Halbach Array for Separation of Magnetic Nanoparticles." IEEE Transactions on Magnetics 49(7): 3449-3452.en_US
dc.identifier.issn0018-9464en_US
dc.identifier.urihttp://hdl.handle.net/11282/309699-
dc.description.abstractA linear array of Nd-Fe-B magnets has been designed and constructed in an inverted Halbach configuration for use in separating magnetic nanoparticles. The array provides a large region of relatively low magnetic field, yet high magnetic field gradient in agreement with finite element modeling calculations. The magnet assembly has been combined with a flow channel for magnetic nanoparticle suspensions, such that for an appropriate distance away from the assembly, nanoparticles of higher moment aggregate and accumulate against the channel wall, with lower moment nanoparticles flowing unaffected. The device is demonstrated for iron oxide nanoparticles with diameters of ~5 and 20 nm. In comparison to other approaches, the inverted Halbach array is more amenable to modeling and to scaling up to preparative quantities of particles.en_US
dc.language.isoen_USen_US
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en_US
dc.identifier.doi10.1109/TMAG.2013.2244577-
dc.subject.departmentPhysics and Astronomyen_US
dc.titleInverted Linear Halbach Array for Separation of Magnetic Nanoparticlesen_US
dc.typearticleen_US
dc.identifier.journalIEEE Transactions on Magneticsen_US
dc.subject.keywordMagnetic liquidsen_US
dc.subject.keywordMagnetic separationen_US
dc.subject.keywordNanoparticlesen_US
dc.subject.keywordPermanent magnetsen_US
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