Optimization of the bio-functionalized area of magnetic biosensors

Edoardo Albisetti (), Daniela Petti, Francesco Damin, Marina Cretich, Marta Bagnati, Laura Sola, Marcella Chiari and Riccardo Bertacco

The European Physical Journal B: Condensed Matter and Complex Systems, 2013, vol. 86, issue 6, 1-5

Abstract: In this work, calculations and preliminary experimental data for determining the optimal condition for the selective bio-functionalization of magnetic tunneling junction (MTJ)-based biosensors are presented. Results on the detection of biomolecular recognition events employing MTJ-based sensor and magnetic beads are presented and interpreted through calculations, taking into account the dependence of the signal on the distribution of the beads with respect to the sensor. Furthermore, it is demonstrated by calculations that a significant increase in the sensor sensitivity and quantification capability can be achieved by selectively bio-functionalizing an area which corresponds to the sensor active area. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Date: 2013
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DOI: 10.1140/epjb/e2013-30676-4

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