Reversible formation of gold nanoparticle–surfactant composite assemblies for the preparation of concentrated colloidal solutions
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Shalkevich, Natallia
Université de Neuchâtel, Institut de Physique, Laboratoire de chimie physique des surfaces, Switzerland
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Shalkevich, Andrey
University of Fribourg, Adolphe Merkle Institute and Fribourg Center for Nanomaterials, Switzerland
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Si-Ahmed, Lynda
Metalor Technologies SA, Neuchâtel, Switzerland
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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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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.
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Faculty
- Faculté des sciences et de médecine
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Department
- AMI - Soft Nanoscience
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Language
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Classification
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Physics
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License
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License undefined
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Identifiers
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Persistent URL
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https://folia.unifr.ch/unifr/documents/301286
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