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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 ; Bürgi, Thomas

In: Physical Chemistry Chemical Physics, 2009, vol. 11, p. 10175-10179

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...