Core-Satellites Assembly of Silver Nanoparticles on a Single Gold Nanoparticle via Metal Ion-Mediated Complex

被引：67

作者：

Choi, Inhee ^{[2
]}

Song, Hyeon Don ^{[2
]}

Lee, Suseung ^{[2
]}

Yang, Young In ^{[2
]}

Kang, Taewook ^{[1
]}

Yi, Jongheop ^{[2
]}

机构：

[1] Sogang Univ, Dept Chem & Biomol Engn, Seoul 121742, South Korea

[2] Seoul Natl Univ, World Class Univ Program Chem Convergence Energy, Sch Chem & Biol Engn, Inst Chem Proc, Seoul 151742, South Korea

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2012年 / 134卷 / 29期

基金：

新加坡国家研究基金会;

关键词：

DISCRETE-DIPOLE APPROXIMATION; PLASMONIC DETECTION; OPTICAL-PROPERTIES; SURFACE; SPECTROSCOPY; SUBSTRATE; BINDING; NANOASSEMBLIES; SHELL;

D O I：

10.1021/ja302684w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report core-satellites (Au-Ag) coupled plasmonic nanoassemblies based on bottom-up, high-density assembly of molecular-scale silver nanoparticles on a single gold nanoparticle surface, and demonstrate direct observation and quantification of enhanced plasmon coupling (i.e., intensity amplification and apparent spectra shift) in a single particle level. We also explore metal ion sensing capability based on our coupled plasmonic core-satellites, which enabled at least 1000 times better detection limit as compared to that of a single plasmonic nanoparticle. Our results demonstrate and suggest substantial promise for the development of coupled plasmonic nanostructures for ultrasensitive detection of various biological and chemical analytes.

引用

页码：12083 / 12090

页数：8

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