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Size Control and Spectroscopic Characterization of Monolayer Protected Gold Nanoparticles Obtained by Laser Ablation in Liquids

Published online by Cambridge University Press:  26 February 2011

Giuseppe Compagnini ,
Alfio Alessandro Scalisi  and
Orazio Puglisi
Giuseppe Compagnini
Affiliation:
gcompagnini@unict.it, University of Catania, Dpt. of Chemistry, Viale A. Doria 6, Catania, N/A, 95125, Italy, +39 095 7385077, +39 095 580138
Alfio Alessandro Scalisi
Affiliation:
ascalisi@unict.it, University of Catania, Chemistry, Italy
Orazio Puglisi*
Affiliation:
opuglisi@unict.it, University of Catania, Chemistry, Italy
*
* Corresponding Author: Orazio Puglisi, Tel. and Fax +39095221635; E-mail: opuglisi@unict.it
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Abstract

In this paper we present a study on the formation of gold colloids by laser ablation of a gold metal target in alkanes and thiol-alkane solutions. The results show a decrease of the gold particles' size up to 2 nm when thiol molecules are present in the liquid environment. In summary, we observed that laser ablation of gold targets in thiol-alkane solutions leads to the formation of stable gold clusters with size smaller than those obtained in the corresponding pure alkane. This result is a consequence of the competition between the aggregation of gold species in the plume (which allows a gold embryo to be formed and to grow) and the tendency of the dispersed thiol molecules to bond at each embryo surface stopping their growth.

Keywords

Aucolloidlaser ablation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 887: Symposium Q – Degradation Processes in Nanostructured Materials , 2005 , 0887-Q08-01
Copyright
Copyright © Materials Research Society 2006

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References

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