On-chip separation of Lactobacillus bacteria from yeasts using dielectrophoresis

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dc.contributor.author Khoshmanesh, K en
dc.contributor.author Baratchi, S en
dc.contributor.author Tovar-Lopez, FJ en
dc.contributor.author Nahavandi, S en
dc.contributor.author Wlodkowic, Donald en
dc.contributor.author Mitchell, A en
dc.contributor.author Kalantar-zadeh, K en
dc.date.accessioned 2011-12-01T23:14:56Z en
dc.date.accessioned 2011-12-02T01:03:47Z en
dc.date.issued 2011 en
dc.identifier.citation Microfluidics and Nanofluidics Online First:1-10 2011 en
dc.identifier.issn 1613-4982 en
dc.identifier.uri http://hdl.handle.net/2292/9738 en
dc.description.abstract Dielectrophoresis, the induced motion of dielectric particles in non-uniform electric fields, enables the separation of suspended bio-particles based on their dimensions or dielectric properties. This work presents a microfluidic system, which utilises a combination of dielectrophoretic (DEP) and hydrodynamic drag forces to separate Lactobacillus bacteria from a background of yeasts. The performance of the system is demonstrated at two operating frequencies of 10 MHz and 100 kHz. At 10 MHz, we are able to trap the yeasts and bacteria at different locations of the microelectrodes as they experience different magnitudes of DEP force. Alternatively, at 100 kHz we are able to trap the bacteria along the microelectrodes, while repelling the yeasts from the microelectrodes and washing them away by the drag force. These separation mechanisms might be applicable to automated lab-on-a-chip systems for the rapid and label-free separation of target bio-particles. en
dc.publisher Springer Verlag en
dc.relation.ispartofseries Microfluidics and Nanofluidics en
dc.relation.replaces http://hdl.handle.net/2292/9680 en
dc.relation.replaces 2292/9680 en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/1613-4982/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title On-chip separation of Lactobacillus bacteria from yeasts using dielectrophoresis en
dc.type Journal Article en
dc.identifier.doi 10.1007/s10404-011-0900-8 en
pubs.begin-page 1 en
pubs.volume Online First en
dc.rights.holder Copyright: Springer Verlag en
pubs.end-page 10 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 245468 en
dc.identifier.eissn 1613-4990 en
pubs.record-created-at-source-date 2011-12-02 en

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