The Study of Surface Plasmon in Au/Ag Core/Shell Compound Nanoparticles

被引：89

作者：

Chen, Yanrong ^{[1
]}

Wu, Haihua ^{[1
]}

Li, Zhipeng ^{[1
]}

Wang, Peijie ^{[1
]}

Yang, Longkun ^{[1
]}

Fang, Yan ^{[1
]}

机构：

[1] Capital Normal Univ, Beijing Key Lab Nanophoton & Nanostruct NPNS, Dept Phys, Beijing 100048, Peoples R China

来源：

PLASMONICS | 2012年 / 7卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Core/shell; Nanoparticles; Surface plasmons; Hybridization; Ablation; ENHANCED RAMAN-SCATTERING; BIMETALLIC NANOPARTICLES; METAL NANOPARTICLES; LASER-ABLATION; LIGHT; NANOSHELLS; NANOSTRUCTURES; POLARIZATION; SPECTROSCOPY; NANOANTENNAS;

D O I：

10.1007/s11468-012-9336-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Au/Ag core/shell nanoparticles are fabricated by laser-ablating Ag plates in Au colloid solution. The absorption band is found to blue shift with increasing ablation time. Mie theory calculations show that the shift is caused by the increase of the Ag shell thickness. The average Ag shell thickness can be determined from the measured absorption peak. Using the plasmon hybridization approach, we show that the absorption band around 510 nm originates from an anti-bonding mode omega (-+) caused by the interaction between a bonding Ag shell mode omega (--) and Au sphere mode omega (S-Au). The blue shift of the omega (-+) mode with the increase of Ag shell thickness is also well predicted by the hybridization theory.

引用

页码：509 / 513

页数：5

共 45 条

[1] Nanosphere-in-a-Nanoshell: A Simple Nanomatryushka [J].

Bardhan, Rizia ;

Mukherjee, Shaunak ;

Mirin, Nikolay A. ;

Levit, Stephen D. ;

Nordlander, Peter ;

Halas, Naomi J. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (16) :7378-7383

[2] Remote Excitation Surface Plasmon and Consequent Enhancement of Surface-Enhanced Raman Scattering Using Evanescent Wave Propagating in Quasi-One-Dimensional MoO3 Ribbon Dielectric Waveguide [J].

Dong, Bin ;

Zhang, Wei ;

Li, Zhipeng ;

Sun, Mengtao .

PLASMONICS, 2011, 6 (01) :189-193

[3] Branched Silver Nanowires as Controllable Plasmon Routers [J].

Fang, Yurui ;

Li, Zhipeng ;

Huang, Yingzhou ;

Zhang, Shunping ;

Nordlander, Peter ;

Halas, Naomi J. ;

Xu, Hongxing .

NANO LETTERS, 2010, 10 (05) :1950-1954

[4] Plasmons in Strongly Coupled Metallic Nanostructures [J].

Halas, Naomi J. ;

Lal, Surbhi ;

Chang, Wei-Shun ;

Link, Stephan ;

Nordlander, Peter .

CHEMICAL REVIEWS, 2011, 111 (06) :3913-3961

[5] Tunable surface plasma resonance frequency in Ag core/Au shell nanoparticles system prepared by laser ablation [J].

Han, Huifeng ;

Fang, Yan ;

Li, Zhipeng ;

Xu, Hongxing .

APPLIED PHYSICS LETTERS, 2008, 92 (02)

[6] Synthesis and optical properties of anisotropic metal nanoparticles [J].

Hao, E ;

Schatz, GC ;

Hupp, JT .

JOURNAL OF FLUORESCENCE, 2004, 14 (04) :331-341

[7] Light-Induced Release of DNA from Gold Nanoparticles: Nanoshells and Nanorods [J].

Huschka, Ryan ;

Zuloaga, Jorge ;

Knight, Mark W. ;

Brown, Lisa V. ;

Nordlander, Peter ;

Halas, Naomi J. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (31) :12247-12255

[8] 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

[9] Plasmon coupling in nanorod assemblies: Optical absorption, discrete dipole approximation simulation, and exciton-coupling model [J].

Jain, Prashant K. ;

Eustis, Susie ;

El-Sayed, Mostafa A. .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (37) :18243-18253

[10] OPTICAL CONSTANTS OF NOBLE METALS [J].

JOHNSON, PB ;

CHRISTY, RW .

PHYSICAL REVIEW B, 1972, 6 (12) :4370-4379

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