Controlled trapping and detection of magnetic particles by a magnetic microactuator and a giant magnetoresistance (GMR) sensor

Handle URI:
http://hdl.handle.net/10754/564893
Title:
Controlled trapping and detection of magnetic particles by a magnetic microactuator and a giant magnetoresistance (GMR) sensor
Authors:
Giouroudi, Ioanna; Gooneratne, Chinthaka Pasan; Kokkinis, Georgios
Abstract:
This paper presents the design and testing of an integrated micro-chip for the controlled trapping and detection of magnetic particles (MPs). A unique magnetic micro-actuator consisting of square-shaped conductors is used to manipulate the MPs towards a giant magnetoresistance (GMR) sensing element which rapidly detects the majority of MPs trapped around the square-shaped conductors. The ability to precisely transport a small number of MPs in a controlled manner over long distances by magnetic forces enables the rapid concentration of a majority of MPs to the sensing zone for detection. This is especially important in low concentration samples. The conductors are designed in such a manner so as to increase the capture efficiency as well as the precision and speed of transportation. By switching current to different conductors, MPs can be manipulated and immobilized on the innermost conductor where the GMR sensor is located. This technique rapidly guides the MPs towards the sensing zone. Secondly, for optimum measurement capability with high spatial resolution the GMR sensor is fabricated directly underneath and all along the innermost conductor to detect the stray fields originating from the MPs. Finally, a microfluidic channel is fabricated on top of this micro-chip. Experiments inside the microchannel were carried out and the MPs were successfully trapped at the sensing area. © (2014) Trans Tech Publications.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Publisher:
Trans Tech Publications
Journal:
Key Engineering Materials
Conference/Event name:
3rd International Conference on Materials and Applications for Sensors and Transducers, IC-MAST 2013
Issue Date:
Apr-2014
DOI:
10.4028/www.scientific.net/KEM.605.352
Type:
Conference Paper
ISSN:
10139826
ISBN:
9783038350514
Appears in Collections:
Conference Papers; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorGiouroudi, Ioannaen
dc.contributor.authorGooneratne, Chinthaka Pasanen
dc.contributor.authorKokkinis, Georgiosen
dc.date.accessioned2015-08-04T07:24:21Zen
dc.date.available2015-08-04T07:24:21Zen
dc.date.issued2014-04en
dc.identifier.isbn9783038350514en
dc.identifier.issn10139826en
dc.identifier.doi10.4028/www.scientific.net/KEM.605.352en
dc.identifier.urihttp://hdl.handle.net/10754/564893en
dc.description.abstractThis paper presents the design and testing of an integrated micro-chip for the controlled trapping and detection of magnetic particles (MPs). A unique magnetic micro-actuator consisting of square-shaped conductors is used to manipulate the MPs towards a giant magnetoresistance (GMR) sensing element which rapidly detects the majority of MPs trapped around the square-shaped conductors. The ability to precisely transport a small number of MPs in a controlled manner over long distances by magnetic forces enables the rapid concentration of a majority of MPs to the sensing zone for detection. This is especially important in low concentration samples. The conductors are designed in such a manner so as to increase the capture efficiency as well as the precision and speed of transportation. By switching current to different conductors, MPs can be manipulated and immobilized on the innermost conductor where the GMR sensor is located. This technique rapidly guides the MPs towards the sensing zone. Secondly, for optimum measurement capability with high spatial resolution the GMR sensor is fabricated directly underneath and all along the innermost conductor to detect the stray fields originating from the MPs. Finally, a microfluidic channel is fabricated on top of this micro-chip. Experiments inside the microchannel were carried out and the MPs were successfully trapped at the sensing area. © (2014) Trans Tech Publications.en
dc.publisherTrans Tech Publicationsen
dc.subjectGMR sensoren
dc.subjectMagnetic particlesen
dc.subjectMagnetic trappingen
dc.titleControlled trapping and detection of magnetic particles by a magnetic microactuator and a giant magnetoresistance (GMR) sensoren
dc.typeConference Paperen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalKey Engineering Materialsen
dc.conference.date13 September 2013 through 17 September 2013en
dc.conference.name3rd International Conference on Materials and Applications for Sensors and Transducers, IC-MAST 2013en
dc.conference.locationPragueen
dc.contributor.institutionInstitute of Sensor and Actuator Systems, Vienna University of Technology, Gusshausstrasse 27-29, 366-ISS, 1040, Vienna, Austriaen
kaust.authorGooneratne, Chinthaka Pasanen
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