Surface-enhanced Raman scattering on nanoshells with tunable surface plasmon resonance

被引：77

作者：

Alvarez-Puebla, RA ^{[1
]}

Ross, DJ ^{[1
]}

Nazri, GA ^{[1
]}

Aroca, RF ^{[1
]}

机构：

[1] Univ Windsor, Fac Sci, Mat & Surface Sci Grp, Windsor, ON N9B 3P4, Canada

来源：

LANGMUIR | 2005年 / 21卷 / 23期

关键词：

D O I：

10.1021/la051645l

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Fabrication, characterization, and optical enhancement applications of bimetallic AgAu nanoparticles and nanoshells are reported. Nanoparticles with tunable surface plasmon resonances are synthesized at room temperature and characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, and photon correlation spectroscopy. The collective electron oscillation of the nanoparticles shows a controllable tunability in the 400-990 nm spectral range, in agreement with plasmon absorption calculated using Mie theory, providing an optimum substrate for surface plasmon-assisted enhanced spectroscopy. Surface-enhanced Raman scattering experiments show that the average enhancement factor obtained with nanoshells could be higher than those obtained with silver sols.

引用

页码：10504 / 10508

页数：5

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