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Proceedings Paper

Ultrasensitive nanosensors based on electronic effects in nanoscale structures
Author(s): Christian Leiterer; Steffen Berg; Thomas Schneider; Norbert Jahr; Ondrej Stranik; Gerald Broenstrup; Silke Christiansen; Andrea Csaki; Wolfgang Fritzsche
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Paper Abstract

Charge carrier distribution changes in solid substrates induced by the presence of biomolecules have the potential as sensoric principle. For a high surface-to-bulk ratio as in the case of nanostructures, this effect can be used for highly sensitive bioanalytics. Plasmonic nanosensors represent one possible implementation: The resonance wavelength of the conductive electron oscillation under light irradiation is changed upon molecular binding at the structure surface. This change can be detected by spectroscopic means, even on a single nanoparticle level using microspectroscopy. Other examples are nanowires in electrodes gaps, either by metal nanoparticles arranged in a chain-like geometry or by rod-like semiconductor nanowires directly bridging the gap. Molecules binding at the surface will lead to changes in the electrical conductivity which can be easily converted into an electrical readout. The various geometries will be discussed and their sensoric potential for an electrical detection demonstrated.

Paper Details

Date Published: 3 May 2011
PDF: 5 pages
Proc. SPIE 8068, Bioelectronics, Biomedical, and Bioinspired Systems V; and Nanotechnology V, 806802 (3 May 2011); doi: 10.1117/12.886577
Show Author Affiliations
Christian Leiterer, Institute of Photonic Technology (Germany)
Steffen Berg, Institute of Photonic Technology (Germany)
Thomas Schneider, Institute of Photonic Technology (Germany)
Norbert Jahr, Institute of Photonic Technology (Germany)
Ondrej Stranik, Institute of Photonic Technology (Germany)
Gerald Broenstrup, Institute of Photonic Technology (Germany)
Silke Christiansen, Institute of Photonic Technology (Germany)
Andrea Csaki, Institute of Photonic Technology (Germany)
Wolfgang Fritzsche, Institute of Photonic Technology (Germany)

Published in SPIE Proceedings Vol. 8068:
Bioelectronics, Biomedical, and Bioinspired Systems V; and Nanotechnology V
Ángel B. Rodríguez-Vázquez; Rainer Adelung, Editor(s)

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