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Issue 31, 2011
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Reshaping and LSPR tuning of Au nanostars in the presence of CTAB

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Abstract

Gold nanostars can easily undergo reshaping into spherical particles by simply adding a small amount of CTAB. Such reshaping can be understood in terms of Ostwald ripening involving dissolution of weakly bound surface atoms at areas with high convex curvature and re-deposition at concave areas. This process can be stopped at any time by adding silver ions, which block bromide and stabilize the surface. Because the localized surface plasmon resonance (LSPR) band of the nanostars colloid gradually changes during etching, stabilization of intermediate morphologies allows fine LSPR tuning, which can be exploited for plasmonic applications.

Graphical abstract: Reshaping and LSPR tuning of Au nanostars in the presence of CTAB

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Supplementary files

Article information


Submitted
09 Feb 2011
Accepted
15 Mar 2011
First published
07 Apr 2011

J. Mater. Chem., 2011,21, 11544-11549
Article type
Paper

Reshaping and LSPR tuning of Au nanostars in the presence of CTAB

L. Rodríguez-Lorenzo, J. M. Romo-Herrera, J. Pérez-Juste, R. A. Alvarez-Puebla and L. M. Liz-Marzán, J. Mater. Chem., 2011, 21, 11544
DOI: 10.1039/C1JM10603A

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