An integrated micro-chip for rapid detection of magnetic particles
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
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AbstractThis 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.
CitationAn integrated micro-chip for rapid detection of magnetic particles 2012, 111 (7):07B327 Journal of Applied Physics
JournalJournal of Applied Physics