Surface-enhanced Raman scattering from ordered Ag nanocluster arrays

We have examined the effect of ordered silver nanocluster substrates on the surface-enhanced Raman spectrum of rhodamine 6G (R6G). Triangular shaped silver nanocluster arrays with order on the approximately 100 mum range were prepared using nanosphere lithography. Direct comparisons of R6G surface-e...

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Bibliographic Details
Published in:The Journal of chemical physics 2004-12, Vol.121 (21), p.10657-10659
Main Authors: Schmidt, Jason P, Cross, Sarah E, Buratto, Steven K
Format: Article
Language:English
Subjects:
Light
Materials Testing
Nanostructures - chemistry
Nanostructures - radiation effects
Nanostructures - ultrastructure
Reproducibility of Results
Scattering, Radiation
Sensitivity and Specificity
Silver - chemistry
Silver - radiation effects
Spectrum Analysis, Raman - methods
Surface Plasmon Resonance - methods
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Summary:We have examined the effect of ordered silver nanocluster substrates on the surface-enhanced Raman spectrum of rhodamine 6G (R6G). Triangular shaped silver nanocluster arrays with order on the approximately 100 mum range were prepared using nanosphere lithography. Direct comparisons of R6G surface-enhanced Raman spectroscopy (SERS) signals between ordered nanocluster regions and amorphous Ag regions prepared under identical deposition conditions provide strong evidence of an electromagnetic field enhancement attributed to the unique nanocluster morphology. We have obtained order of magnitude enhancement factors for both 200 and 90 nm Ag nanocluster SERS substrates relative to Ag films.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.1799992