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Proceedings Paper

Label-free optical sensing on hybrid plasmonic-nanobiosilica platforms
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Paper Abstract

Diatoms are single-celled algaes that make photonic-crystal-like silica shells or frustules with hierarchical micro- and nano-scale features consisting of two-dimensional periodic pores. In this paper, we present an innovative label-free optical sensor based on a biological-plasmonic hybrid nanostructure by self-assembling silver (Ag) nanoparticles into diatom frustules. The photonic-crystal-like diatom frustules provide a spatially confined electric field with enhanced intensity that can form hybrid photonic-plasmonic modes through the optical coupling with Ag nanoparticles. The experimental results demonstrate 4-6x and 9-12x improvement of sensitivities to detect the Raman dye for resonance and nonresonance SERS sensing, respectively.

Paper Details

Date Published: 13 March 2014
PDF: 7 pages
Proc. SPIE 8933, Frontiers in Biological Detection: From Nanosensors to Systems VI, 89330J (13 March 2014); doi: 10.1117/12.2042429
Show Author Affiliations
Fanghui Ren, Oregon State Univ. (United States)
Jeremy Campbell, Oregon State Univ. (United States)
Gregory L. Rorrer, Oregon State Univ. (United States)
Alan X. Wang, Oregon State Univ. (United States)


Published in SPIE Proceedings Vol. 8933:
Frontiers in Biological Detection: From Nanosensors to Systems VI
Benjamin L. Miller; Philippe M. Fauchet; Brian T. Cunningham, Editor(s)

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