Multilayer silver nanoparticles-modified optical fiber tip for high performance SERS remote sensing

被引：122

作者：

Andrade, Gustavo F. S. ^{[1
]}

Fan, MeiKun ^{[1
]}

Brolo, Alexandre G. ^{[1
]}

机构：

[1] Univ Victoria, Dept Chem, Victoria, BC V8W 3V6, Canada

来源：

BIOSENSORS & BIOELECTRONICS | 2010年 / 25卷 / 10期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

Surface-enhanced Raman scattering (SERS); Optical fiber; Nanoparticles; Self-assembly; Raman imaging; Remote sensing; RAMAN-SPECTROSCOPY; PYRIDINE; SPECTRA;

D O I：

10.1016/j.bios.2010.03.007

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

This work presents the construction and optimization of nanoparticles-modified optical fiber tip (NPs-MOFT) devices for remote sensing by surface-enhanced Raman scattering (SERS). Silver nanoparticles (Ag-NPs) were self-assembled on optical fiber tips through a "layer-by-layer" procedure. It is shown that the SEAS performance is at optimum when 5 "layers" of 50 nm Ag-NPs were deposited on the optical fiber tip. Using the optimized Ag-NPs-MOFT device, it was possible to detect 200 nM of the R6G dye in remote sensing mode (backscattering through the fiber). It was also possible to detect dye molecules with different structures and charges at the micro-molar concentration level, including anions, cations and neutral species. It can be envisioned that the Ag-NPs-MOFT device reported in this work can be further developed for SERS-based remote biosensing. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2270 / 2275

页数：6

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