Preparation of functional silane-stabilized gold colloids in the (sub)nanometer size range

Détails

ID Serval
serval:BIB_DCD34B683FF3
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Preparation of functional silane-stabilized gold colloids in the (sub)nanometer size range
Périodique
Langmuir
Auteur⸱e⸱s
Buining P.A., Humbel B.M., Philipse A.P., Verkleij A.J.
ISSN
0743-7463
Statut éditorial
Publié
Date de publication
1997
Volume
13
Numéro
15
Pages
3921-3926
Langue
anglais
Résumé
A synthesis method is introduced for very small uniform gold particles (diameter less than 5 nm), based on the reduction of hydrogen tetrachloroaurate(III) in ethanol in the presence of (gamma-mercaptopropyl)trimethoxysilane (MPS). The surface layer of MPS molecules gives the gold particles a high colloidal stability and allows in principle further reaction with any silane coupling agent. Decrease of the HAuCl(4): MPS ratio allows a controlled reduction of gold particle size, resulting in remarkably uniform gold dusters of (sub)nanometer size, observed with high-angle-annular-dark-field scanning transmission electron microscopy. After attachment of (gamma-aminopropyl)triethoxysilane (APS) to the MPS surface layer, other molecules may be covalently bound to the gold colloid via the amine group of APS. As an illustrative example we prepared in this manner gold particles labeled with a fluorescent dye. The chemical structure of the surface silanes was studied with Fourier transform infrared spectroscopy.
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Création de la notice
18/10/2012 14:02
Dernière modification de la notice
20/08/2019 16:01
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