材料科学
纳米颗粒
拉曼散射
纳米技术
拉曼光谱
二甲基甲酰胺
产量(工程)
化学工程
光学
有机化学
溶剂
复合材料
物理
工程类
化学
作者
Pankaj Kumar,Isabel Pastoriza‐Santos,Benito Rodríguez‐González,F. Javier Garcı́a de Abajo,Luis M. Liz‐Marzán
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2007-11-29
卷期号:19 (1): 015606-015606
被引量:626
标识
DOI:10.1088/0957-4484/19/01/015606
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.
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