Suitable combination of noble/ferromagnetic metal multilayers for enhanced magneto-plasmonic biosensing

Regatos, David, Sepulveda, Borja, Farina, David, Carrascosa, Laura G. and Lechuga, Laura M. (2011) Suitable combination of noble/ferromagnetic metal multilayers for enhanced magneto-plasmonic biosensing. Optics Express, 19 9: 8336-8346. doi:10.1364/OE.19.008336


Author Regatos, David
Sepulveda, Borja
Farina, David
Carrascosa, Laura G.
Lechuga, Laura M.
Title Suitable combination of noble/ferromagnetic metal multilayers for enhanced magneto-plasmonic biosensing
Journal name Optics Express   Check publisher's open access policy
ISSN 1094-4087
Publication date 2011-04
Sub-type Article (original research)
DOI 10.1364/OE.19.008336
Open Access Status DOI
Volume 19
Issue 9
Start page 8336
End page 8346
Total pages 11
Place of publication Washington, USA
Publisher Optical Society of America
Language eng
Abstract We present a theoretical and experimental study on the biosensing sensitivity of Au/Co/Au multilayers as transducers of the magneto-optic surface-plasmon-resonance (MOSPR) sensor. We demonstrate that the sensing response of these magneto-plasmonic (MP) transducers is a trade-off between the optical absorption and the magneto-optical activity, observing that the MP multilayer with larger MO effect does not provide the best sensing response. We show that it is possible to design highly-sensitive MP transducers able to largely surpass the limit of detection of the conventional surface-plasmon-resonance (SPR) sensor. This was proved comparing the biosensing performance of both sensors for the label-free detection of short DNA chains hybridization. For this purpose, we used and tested a novel label-free biofunctionalization protocol based on polyelectrolytes, which increases the resistance of MP transducers in aqueous environments.
Keyword Resonance Biosensors
Surface-Plasmons
Phase
Polaritons
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Thu, 11 Apr 2013, 16:17:43 EST by Laura Garcia Carrascosa on behalf of Aust Institute for Bioengineering & Nanotechnology