Probing dynamic generation of hot-spots in self-assembled chains of gold nanorods by surface-enhanced raman scattering

Anna Lee, Gustavo F.S. Andrade, Aftab Ahmed, Michele L. Souza, Neil Coombs, Ethan Tumarkin, Kun Liu, Reuven Gordon, Alexandre G. Brolo, Eugenia Kumacheva

Research output: Contribution to journalArticlepeer-review

218 Scopus citations

Abstract

Further progress in the applications of self-assembled nanostructures critically depends on developing a fundamental understanding of the relation between the properties of nanoparticle ensembles and their time-dependent structural characteristics. Following dynamic generation of hot-spots in the self-assembled chains of gold nanorods, we established a direct correlation between ensemble-averaged surface-enhanced Raman scattering and extinction properties of the chains. Experimental results were supported with comprehensive finite-difference time-domain simulations. The established relationship between the structure of nanorod ensembles and their optical properties provides the basis for creating dynamic, solution-based, plasmonic platforms that can be utilized in applications ranging from sensing to nanoelectronics.

Original languageEnglish (US)
Pages (from-to)7563-7570
Number of pages8
JournalJournal of the American Chemical Society
Volume133
Issue number19
DOIs
StatePublished - May 18 2011
Externally publishedYes

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