Gold Nanoparticles-Modified Tapered Fiber Nanoprobe for Remote SERS Detection

Author

Zhenyi Chen ; Zhangmin Dai ; Na Chen ; Shupeng Liu ; Fufei Pang ; Bo Lu ; Tingyun Wang

Author_Institution

Key Lab. of Specialty Fiber Opt. & Opt. Access Networks, Shanghai Univ., Shanghai, China

Volume

26

Issue

8

fYear

2014

fDate

41744

Firstpage

777

Lastpage

780

Abstract

This letter presents a surface-enhanced Raman scattering (SERS) nanoprobe based on gold nanoparticles-modified tapered optical fiber and demonstrates its ability to perform remote Raman detection. The nanoscale tapered fiber with the tip size of 40.7 nm was made by heated pulling and chemical etching methods. The gold nanoparticles, prepared beforehand by the Frens method with a microwave heating process, were deposited on the tapered surface of the nanoprobe with the electrostatic self-assembly technology. Raman spectra of Rhodamine 6G (R6G) molecules were measured, using this SERS nanoprobe in an optrode remote detection mode. Considerably high signal-to-noise ratio and high sensitivity were achieved. The detection limit for R6G aqueous solution reaches 10^-8 mol/L.

Keywords

chemical sensors; dyes; etching; fibre optic sensors; gold; microwave materials processing; nanofabrication; nanoparticles; nanophotonics; nanosensors; self-assembly; surface enhanced Raman scattering; Au; Frens method; R6G aqueous solution; Raman spectra; Rhodamine 6G molecules; chemical etching; detection limit; electrostatic self-assembly technology; gold nanoparticle-modified tapered optical fiber nanoprobe; microwave heating process; optrode remote detection mode; remote Raman detection; remote SERS detection; signal-to-noise ratio; surface-enhanced Raman scattering nanoprobe; tapered surface; tip size; Gold; Nanoparticles; Optical fiber sensors; Optical fibers; Raman scattering; Surface treatment; Optical fiber sensors; Raman scattering; nanostructures; spectroscopy;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2306134

Filename

6739998