Metal-Enhanced Fluorescence of Carbon Nanotubes

被引：97

作者：

Hong, Guosong ^{[1
]}

Tabakman, Scott M. ^{[1
]}

Welsher, Kevin ^{[1
]}

Wang, Hailiang ^{[1
]}

Wang, Xinran ^{[1
]}

Dai, Hongjie ^{[1
]}

机构：

[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 45期

关键词：

CELLS; MICROSCOPY; MOLECULES; MICE;

D O I：

10.1021/ja1087997

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The photoluminescence (PL) quantum yield of single-walled carbon nanotubes (SWNTs) is relatively low, with various quenching effects by metallic species reported in the literature. Here, we report the first case of metal enhanced fluorescence (MEF) of surfactant-coated carbon nanotubes on nanostructured gold substrates. The photoluminescence quantum yield of SWNTs is observed to be enhanced more than 10-fold. The dependence of fluorescence enhancement on metal-nanotube distance and on the surface plasmon resonance (SPR) of the gold substrate for various SWNT chiralities is measured to reveal the mechanism of enhancement. Surfactant-coated SWNTs in direct contact with metal exhibit strong MEF without quenching, suggesting a small quenching distance for SWNTs on the order of the van der Waals distance, beyond which the intrinsically fast nonradiative decay rate in nanotubes is little enhanced by metal. The metal enhanced fluorescence of SWNTs is attributed to radiative lifetime shortening through resonance coupling of SWNT emission to the reradiating dipolar plasmonic modes in the metal.

引用

页码：15920 / 15923

页数：4

共 27 条

[1] Fast and slow deposition of silver nanorods on planar surfaces: Application to metal-enhanced fluorescence [J].