Nano Archive

High-yield synthesis and optical response of gold nanostars

Kumar, P. S. and Pastoriza-Santos, I. and Rodríguez-González, B. and de Abajo, F. J. G. and Liz-Marzán, L. M. (2008) High-yield synthesis and optical response of gold nanostars. NANOTECHNOLOGY, 19 (1).

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Official URL: http://dx.doi.org/10.1088/0957-4484/19/01/015606

Abstract

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.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Analytical Science > Nanotechnology for sensing and actuating
Physical Science > Nano objects
Material Science > Nanochemistry
ID Code:2655
Deposited By:Anuj Seth
Deposited On:09 Jan 2009 11:24
Last Modified:20 Jan 2009 11:13

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