Surface-Enhanced Raman Spectroscopy Sensors From Nanobiosilica With Self-Assembled Plasmonic Nanoparticles

Author

Fanghui Ren ; Campbell, Joe ; Rorrer, Gregory L. ; Wang, Alan X.

Author_Institution

Oregon State Univ., Corvallis, OR, USA

Volume

20

Issue

3

fYear

2014

fDate

May-June 2014

Firstpage

127

Lastpage

132

Abstract

We present an innovative surface-enhanced Raman spectroscopy (SERS) 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 4-6× and 9-12× improvement of sensitivities to detect the Raman dye for resonance and nonresonance SERS sensing, respectively. Such low-cost and high-sensitivity SERS sensors have significant potentials for label-free biosensing.

Keywords

chemical sensors; dyes; nanobiotechnology; nanoparticles; nanophotonics; nanosensors; optical sensors; photonic crystals; plasmonics; self-assembly; silicon compounds; silver; surface enhanced Raman scattering; Ag-SiO₂; Raman dye; biological-plasmonic hybrid nanostructure; hybrid photonic-plasmonic modes; label-free biosensing; nanobiosilica; nonresonance SERS sensing; optical coupling; photonic-crystal-like diatom frustules; resonance SERS sensing; self-assembled plasmonic nanoparticles; self-assembling silver nanoparticles; spatially confined electric field; surface-enhanced Raman spectroscopy sensor; Glass; Nanobioscience; Photonic crystals; Plasmons; Raman scattering; Sensors; Substrates; Diatom frustules; photonic crystals; surface plasmons; surface-enhanced Raman spectroscopy;

fLanguage

English

Journal_Title

Selected Topics in Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

1077-260X

Type

jour

DOI

10.1109/JSTQE.2014.2301016

Filename

6714387