Label-Free Optical Sensing on Hybrid Plasmonic-Nanobiosilica Platforms

被引：0

作者：

Ren, Fanghui ^{[2
]}

Campbell, Jeremy ^{[1
]}

Rorrer, Gregory L. ^{[1
]}

Wang, Alan X. ^{[2
]}

机构：

[1] Oregon State Univ, Sch Chem Biol & Environm Engn, Corvallis, OR 97331 USA

[2] Oregon State Univ, Sch Elect Engn & Comp Sci, Corvallis, OR 97331 USA

来源：

FRONTIERS IN BIOLOGICAL DETECTION: FROM NANOSENSORS TO SYSTEMS VI | 2014年 / 8933卷

关键词：

Diatom frustules; Raman mapping; guided mode resonance; localized surface plasmons; NANOPARTICLES;

D O I：

10.1117/12.2042429

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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. 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.

引用

页数：7

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