High-yield synthesis and optical response of gold nanostars

被引：628

作者：

Senthil Kumar, Pandian ^{[1
,2
]}

Pastoriza-Santos, Isabel ^{[1
,2
]}

Rodriguez-Gonzalez, Benito ^{[1
,2
]}

Garcia de Abajo, F. Javier ^{[3
]}

Liz-Marzan, Luis M. ^{[1
,2
]}

机构：

[1] Univ Vigo, CSIC, Dept Quim Fis, Vigo 36310, Spain

[2] Univ Vigo, CSIC, Unidad Asociada, Vigo 36310, Spain

[3] CSIC, Inst Opt, E-28006 Madrid, Spain

来源：

NANOTECHNOLOGY | 2008年 / 19卷 / 01期

关键词：

D O I：

10.1088/0957-4484/19/01/015606

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Multipod Au nanoparticles (nanostars) with single crystalline tips were synthesized in extremely high yield through the reduction of HAuCl4 in a concentrated solution of poly(vinylpyrrolidone) (PVP) in N,N-dimethylformamide (DMF), in the presence of preformed Au nanoparticle seeds, but with no need for external energy sources. Nanostar dispersions display a well-defined optical response, which was found (through theoretical modeling) to comprise a main mode confined within the tips and a secondary mode confined in the central body. Calculations of the surface enhanced Raman scattering (SERS) response additionally show that this morphology will be relevant for sensing applications.

引用

页数：6

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