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.
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页数：7
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