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Enhancing surface plasmon resonances of metallic nanoparticles by diatom biosilica

TitleEnhancing surface plasmon resonances of metallic nanoparticles by diatom biosilica
Publication TypeJournal Article
Year of Publication2013
AuthorsRen, F., J. Campbell, X. Wang, G. L. Rorrer, and A. X. Wang
JournalOptics Express
Volume21
Issue13
Pagination15308
Date Published06/2013
Abstract

Diatoms are single-celled algaes that make photonic-crystal-like silica shells or frustules with hierarchical micro- & nano-scale features consisting of two-dimensional periodic pores. This article reports the use of diatom frustules as an integration platform to enhance localized surface plasmon resonances of self-assembled silver nanoparticles (NPs) on the surface of diatom frustules. Theoretical and experimental results show enhanced localized surface plasmons due to the coupling with the guided-mode resonances of the frustules. We observed 2 × stronger optical extinction and over 4 × higher sensitivity of surface-enhanced Raman scattering of Rhodmine 6G from the NPs-on-diatom than the NPs-on-glass structure.

DOI10.1364/OE.21.015308
Short TitleOpt. Express