Probing Dynamic Generation of Hot-Spots in Self-Assembled Chains of Gold Nanorods by Surface-Enhanced Raman Scattering
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- 作者：Anna Lee ; Gustavo F. S. Andrade ; Aftab Ahmed ; Michele L. Souza ; Neil Coombs ; Ethan Tumarkin ; Kun Liu ; Reuven Gordon ; Alexandre G. Brolo ; Eugenia Kumacheva
- 刊名：Journal of the American Chemical Society
- 出版年：2011
- 出版时间：May 18, 2011
- 年：2011
- 卷：133
- 期：19
- 页码：7563-7570
- 全文大小：961K
- 年卷期：v.133,no.19(May 18, 2011)
- ISSN：1520-5126
文摘
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.