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TitleTunable SERS using gold nanoaggregates on an elastomeric substrate
Publication TypeJournal Article
Year of Publication2013
AuthorsHossain, M.K., Willmott G.R., Etchegoin P.G., Blaikie R.J., and Tallon J.L.
Pagination8945 - 8950
Date Published2013
ISSN20403364 (ISSN)
Keywordsarticle, Atomic force microscopy, Biaxial strains, chemistry, Colloidal gold nanoparticles, elastomeric, Elastomeric membranes, Elastomeric substrates, Gold, Gold nanoaggregates, metal nanoparticle, Metal Nanoparticles, Nanoparticles, polymer, Polymers, Raman spectrometry, Relative motion, rhodamine, rhodamine 6G, Rhodamines, SERS enhancement, Spectrum Analysis, Raman, Substrates, Surface enhanced Raman Scattering (SERS), Surface properties, surface property, Surface scattering
AbstractWe report on the self-assembly of colloidal gold nanoparticles on a stretchable, elastomeric membrane, and the use of this membrane as a base substrate for far-field confocal Raman measurements. Surface-enhanced Raman scattering (SERS) enhancement for such a substrate was estimated as 10 6 to 107. Atomic force microscopy has been used to study the changes in nanoparticle topography when the membrane is stretched. The homogeneous strain defined by average relative motion of nanoparticles is approximately half the macroscopically-applied biaxial strain. The SERS intensity was maximized when the membrane was at rest (i.e. without stretch), and reduced as stretching was increased. Our measurements are consistent with theoretical and numerical SERS enhancements for the interstitial gap between two spheres. The data indicate that the resting gap between the spheres is 11 nm or 16 nm, using two theoretical models. This work represents progress towards particularly facile sample fabrication and in situ tuning techniques for SERS. © The Royal Society of Chemistry 2013.

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