Gold/silver/gold trilayer films on nanostructured polycarbonate substrates for direct and label‐free nanoplasmonic biosensing

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...

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Bibliographic Details
Published in:Journal of biophotonics 2018-08, Vol.11 (8), p.e201800043-n/a
Main Authors: López‐Muñoz, Gerardo A., Estévez, M.‐Carmen, Vázquez‐García, Marc, Berenguel‐Alonso, Miguel, Alonso‐Chamarro, Julián, Homs‐Corbera, Antoni, Lechuga, Laura M.
Format: Article
Language:English
Subjects:
Biomarkers
Biosensors
Blu‐ray disc
Fabrication
Figure of merit
flexible substrate
Gold
nanoplasmonic devices
Nanostructure
nucleation layer
Optical disks
Organic chemistry
Polycarbonate
Proteins
Silver
silver nanoslits
Substrates
Surface roughness
Surface stability
Urine
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Summary: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
ISSN:1864-063X
1864-0648
DOI:10.1002/jbio.201800043