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
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 13205
- DOI 10.1039/b912571j
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301286
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