An integrated micro-chip for rapid detection of magnetic particles

Chinthaka Pasan Gooneratne, Cai Liang, Ioanna Giouroudi, Jürgen Kosel

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

This paper proposes an integrated micro-chip for the manipulation and detection of magnetic particles (MPs). A conducting ring structure is used to manipulate MPs toward giant magnetoresistance(GMR) sensing elements for rapid detection. The GMRsensor is fabricated in a horseshoe shape in order to detect the majority of MPs that are trapped around the conducting structure. The GMR sensing elements are connected in a Wheatstone bridge circuit topology for optimum noise suppression. Full fabrication details of the micro-chip, characterization of the GMRsensors, and experimental results with MPs are presented in this paper. Experimental results showed that the micro-chip can detect MPs from low concentration samples after they were guided toward the GMRsensors by applying current to the conducting ring structure.
Original languageEnglish (US)
Pages (from-to)07B327
JournalJournal of Applied Physics
Volume111
Issue number7
DOIs
StatePublished - Mar 10 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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