Show simple item record

dc.contributor.authorGiouroudi, Ioanna
dc.contributor.authorGooneratne, Chinthaka Pasan
dc.contributor.authorKokkinis, Georgios
dc.date.accessioned2015-08-04T07:24:21Z
dc.date.available2015-08-04T07:24:21Z
dc.date.issued2014-04
dc.identifier.isbn9783038350514
dc.identifier.issn10139826
dc.identifier.doi10.4028/www.scientific.net/KEM.605.352
dc.identifier.urihttp://hdl.handle.net/10754/564893
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.
dc.publisherTrans Tech Publications
dc.subjectGMR sensor
dc.subjectMagnetic particles
dc.subjectMagnetic trapping
dc.titleControlled trapping and detection of magnetic particles by a magnetic microactuator and a giant magnetoresistance (GMR) sensor
dc.typeConference Paper
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalKey Engineering Materials
dc.conference.date13 September 2013 through 17 September 2013
dc.conference.name3rd International Conference on Materials and Applications for Sensors and Transducers, IC-MAST 2013
dc.conference.locationPrague
dc.contributor.institutionInstitute of Sensor and Actuator Systems, Vienna University of Technology, Gusshausstrasse 27-29, 366-ISS, 1040, Vienna, Austria
kaust.personGooneratne, Chinthaka Pasan


This item appears in the following Collection(s)

Show simple item record