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

共 32 条

[11] The optical properties of nanoshells [J].

Halas, Naomi .

Optics and Photonics News, 2002, 13 (08) :26-30

[12] Surface-enhanced Raman scattering on tunable plasmonic nanoparticle substrates [J].

Jackson, JB ;

Halas, NJ .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2004, 101 (52) :17930-17935

[13] The optical properties of metal nanoparticles: The influence of size, shape, and dielectric environment [J].

Kelly, KL ;

Coronado, E ;

Zhao, LL ;

Schatz, GC .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (03) :668-677

[14]

Kreibig U., 1995, OPTICAL PROPERTIES M, V25

[15] Shape and size dependence of radiative, non-radiative and photothermal properties of gold nanocrystals [J].

Link, S ;

El-Sayed, MA .

INTERNATIONAL REVIEWS IN PHYSICAL CHEMISTRY, 2000, 19 (03) :409-453

[16] Site-specific Raman spectroscopy and chemical dynamics of nanoscale interstitial systems [J].

Lu, HP .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (07) :R333-R355

[17] Wavelength-scanned surface-enhanced Raman excitation spectroscopy [J].

McFarland, AD ;

Young, MA ;

Dieringer, JA ;

Van Duyne, RP .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (22) :11279-11285

[18] SURFACE-ENHANCED SPECTROSCOPY [J].

MOSKOVITS, M .

REVIEWS OF MODERN PHYSICS, 1985, 57 (03) :783-826

[19] HARD AND SOFT ACIDS AND BASES [J].

PEARSON, RG .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1963, 85 (22) :3533-&

[20] ACIDS AND BASES [J].

PEARSON, RG .

SCIENCE, 1966, 151 (3707) :172-&

← 1 2 3 4 →