Web of Science: 1 citations, Scopus: 1 citations, Google Scholar: citations
Gold/silver/gold trilayer films on nanostructured polycarbonate substrates for direct and label-free nanoplasmonic biosensing
López Muñoz, Gerardo Arturo (Institut Català de Nanociència i Nanotecnologia)
Estévez Alberola, Maria Carmen (Institut Català de Nanociència i Nanotecnologia)
Vázquez García, Marc (Institut Català de Nanociència i Nanotecnologia)
Berenguel Alonso, Miguel (Universitat Autònoma de Barcelona. Departament de Química)
Alonso Chamarro, Julián (Universitat Autònoma de Barcelona. Departament de Química)
Homs Corbera, Antoni (Institut Català de Nanociència i Nanotecnologia)
Lechuga, Laura M. (Institut Català de Nanociència i Nanotecnologia)

Date: 2018
Abstract: Ultrasmooth gold/silver/gold trilayer nanostructured plasmonic sensors were obtained using commercial Blu-ray optical discs as nanoslits-based flexible polymer substrates. A thin gold film was used as an adhesion and nucleation layer to improve the chemical stability and reduce the surface roughness of the overlying silver film, without increasing ohmic plasmon losses. The structures were physically and optically characterized and compared with nanostructures of single gold layer. Ultrasmooth and chemically stable trilayer nanostructures with a surface roughness <0. 5 nm were obtained following a simple and reproducible fabrication process. They showed a figure of merit (FOM) value up to 69. 2 RIU which is significantly higher (more than 95%) than the gold monolayer counterpart. Their potential for biosensing was demonstrated by employing the trilayer sensor for the direct and refractometric (label-free) detection of C-reactive protein (CRP) biomarker in undiluted urine achieving a Limit of Detection (LOD) in the pM order.
Note: Altres ajuts: CONACYT, Grant/Award Number: 225362
Note: Número d'acord de subvenció AGAUR/2014/SGR-624
Note: Número d'acord de subvenció MINECO/SEV-2013-0295
Note: Número d'acord de subvenció MINECO/TEC2016‐78515‐R
Rights: Tots els drets reservats.
Language: Anglès.
Document: article ; recerca ; acceptedVersion
Subject: Blu‐ray disc ; Flexible substrate ; Nanoplasmonic devices ; Nucleation layer ; Silver nanoslits
Published in: Journal of biophotonics, Vol. 11, Issue 8 (August 2018) , art. e201800043, ISSN 1864-0648

DOI: 10.1002/jbio.201800043


Postprint
17 p, 1.3 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles

 Record created 2019-06-12, last modified 2019-09-18



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