RSC Publishing


Publishing

 

Cover image for Physical Chemistry Chemical Physics, select for current issue

Physical Chemistry Chemical Physics

High quality research in physical chemistry, chemical physics and biophysical chemistry.



Subscribers

Non-subscribers

Free access



Paper

Phys. Chem. Chem. Phys., 2009, 11, 10175 - 10179, DOI: 10.1039/b912571j

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

Natallia Shalkevich, Andrey Shalkevich, Lynda Si-Ahmed and Thomas Bürgi

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.

Graphical abstract image for this article (ID: b912571j)