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2012 | 121 | 2 | 420-425
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From Magnetic Nanoparticles to Magnetoresistive Biosensors

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Abstracts
EN
This paper highlights recent advances in synthesis and magnetotransport properties of magnetic Co nanoparticles. It is shown that magnetic Co nanoparticles self-assembled in nanoparticular monolayers revealing giant magnetoresistance similar to granular systems but with additional features resulting from dipolar interactions between small domains of nanoparticles. A spin-valve with one magnetic Co nanoparticular electrode is employed as a model to demonstrate that individual magnetic moments of Co nanoparticles can be coupled to a magnetic Co layer which in turn offers tailoring of the resulting giant magnetoresistance characteristics. In addition, it is demonstrated that combining a magnetic on-off ratchet with magnetic tunneling junctions integrated in the ratchet introduces a new biosensor concept enabling: (1) simultaneous transporting and separating biomolecules, (2) dynamical biomolecule detection when passing magnetic tunneling junctions in a 1D arrangement. It is projected that this biosensor concept could be applied for viruses as well as for bacteria.
Keywords
Contributors
author
  • Institute of Solid State Physics, Vienna University of Technology, A-1040 Vienna, Austria
author
  • Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, 33615 Bielefeld, Germany
author
  • Massachusetts Institute of Technology, RLE, LEES, 77 Massachusetts Ave, 02139 Cambridge, MA, USA
author
  • Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, 33615 Bielefeld, Germany
author
  • Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, 33615 Bielefeld, Germany
author
  • Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, 33615 Bielefeld, Germany
author
  • Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, 33615 Bielefeld, Germany
author
  • Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, 33615 Bielefeld, Germany
author
  • Department of Chemistry, Organometallic Chemistry, Bielefeld University, 33615 Bielefeld, Germany
author
  • Department of Chemistry, Organic Chemistry I, Bielefeld University, 33615 Bielefeld, Germany
author
  • Department of Chemistry, Organometallic Chemistry, Bielefeld University, 33615 Bielefeld, Germany
author
  • Department of Chemistry, Organic Chemistry I, Bielefeld University, 33615 Bielefeld, Germany
author
  • Department of Chemistry, Inorganic and Structural Chemistry, Bielefeld University, 33615 Bielefeld, Germany
author
  • Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, 33615 Bielefeld, Germany
author
  • Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, 33615 Bielefeld, Germany
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv121n257kz
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