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
AMI - Soft Nanoscience
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/301286
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