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Reversible formation of gold nanoparticle–surfactant composite assemblies for the preparation of concentrated colloidal solutions

Shalkevich, Natallia
Shalkevich, Andrey
Si-Ahmed, Lynda
Published in Physical Chemistry Chemical Physics. 2009, vol. 11, no. 43, p. 10175-10179
Abstract We have developed a simple method for the preparation of nearly mono-dispersed stable gold colloids with a fairly high concentration using a two step procedure. First we synthesize citrate capped gold nanoparticles and then exchange the citrate ions with triethyleneglycolmono-11-mercaptoundecylether (EGMUDE). This leads to the immediate precipitation and formation of composite assemblies. The gold nanoparticles were successfully self-redispersed after a few days. The prepared gold colloid can be easily concentrated up to 20 times by separation of the flocculated part. UV-visible spectra, transmission electron microscopy (TEM), and dynamic light scattering (DLS) were used to characterize the products thus formed.
Stable URL https://archive-ouverte.unige.ch/unige:14787
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Deposited on : 2011-03-18

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