Creating hot nanoparticle pairs for surface-enhanced Raman spectroscopy through optical manipulation

被引：244

作者：

Svedberg, Fredrik

Li, Zhipeng

Xu, Hongxing

Kall, Mikael ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Appl Phys, SE-41296 Gothenburg, Sweden

[2] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

来源：

NANO LETTERS | 2006年 / 6卷 / 12期

关键词：

D O I：

10.1021/nl062101m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We use optical tweezers to move single silver nanoparticles into near-field contact with immobilized particles, forming isolated surface-enhanced Raman spectroscopy (SERS) active Ag particle dimers. The surface-averaged SERS intensity increases by a factor similar to 20 upon dimerization. Electrodynamics calculations indicate that the final approach between the particles is due to "optical binding". The described methodology may facilitate controlled single molecule SERS analysis.

引用

收藏

页码：2639 / 2641

页数：3

相关论文

共 17 条

[1] OBSERVATION OF A SINGLE-BEAM GRADIENT FORCE OPTICAL TRAP FOR DIELECTRIC PARTICLES [J].

ASHKIN, A ;

DZIEDZIC, JM ;

BJORKHOLM, JE ;

CHU, S .

OPTICS LETTERS, 1986, 11 (05) :288-290

[2] OPTICAL BINDING [J].

BURNS, MM ;

FOURNIER, JM ;

GOLOVCHENKO, JA .

PHYSICAL REVIEW LETTERS, 1989, 63 (12) :1233-1236

[3] Interparticle coupling effects in nanofabricated substrates for surface-enhanced Raman scattering [J].

Gunnarsson, L ;

Bjerneld, EJ ;

Xu, H ;

Petronis, S ;

Kasemo, B ;

Käll, M .

APPLIED PHYSICS LETTERS, 2001, 78 (06) :802-804

[4] A nanoscale optical blosensor: Sensitivity and selectivity of an approach based on the localized surface plasmon resonance spectroscopy of triangular silver nanoparticles [J].

Haes, AJ ;

Van Duyne, RP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (35) :10596-10604

[5] Optical forces between metallic particles [J].

Hallock, AJ ;

Redmond, PL ;

Brus, LE .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2005, 102 (05) :1280-1284

[6] 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

[7] Hot spots in silver nanowire bundles for surface-enhanced Raman spectroscopy [J].

Lee, SJ ;

Morrill, AR ;

Moskovits, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (07) :2200-2201

[8] High-density silver nanoparticle film with temperature-controllable interparticle spacing for a tunable surface enhanced Raman scattering substrate [J].

Lu, Y ;

Liu, GL ;

Lee, LP .

NANO LETTERS, 2005, 5 (01) :5-9

[9] Surface enhanced Raman spectroscopy of individual rhodamine 6G molecules on large Ag nanocrystals [J].

Michaels, AM ;

Nirmal, M ;

Brus, LE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (43) :9932-9939

[10] Probing single molecules and single nanoparticles by surface-enhanced Raman scattering [J].

Nie, SM ;

Emery, SR .

SCIENCE, 1997, 275 (5303) :1102-1106