Journal article

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

  • Shalkevich, Natallia Université de Neuchâtel, Institut de Physique, Laboratoire de chimie physique des surfaces, Switzerland
  • Shalkevich, Andrey University of Fribourg, Adolphe Merkle Institute and Fribourg Center for Nanomaterials, Switzerland
  • Si-Ahmed, Lynda Metalor Technologies SA, Neuchâtel, Switzerland
  • Bürgi, Thomas Université de Neuchâtel, Institut de Physique, Laboratoire de chimie physique des surfaces, Switzerland - Ruprecht-Karls-Universität Heidelberg, Physikalisch-Chemisches Institut, Germany
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    17.09.2009
Published in:
  • Physical Chemistry Chemical Physics. - 2009, vol. 11, p. 10175-10179
English 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.
Faculty
Faculté des sciences et de médecine
Department
Institut Adolphe Merkle
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/301286
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