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Cetyltrimethylammonium bromide silver bromide complex as the capping agent of gold nanorods.

Langmuir : the ACS journal of surfaces and colloids (2008-08-12)
Fabien Hubert, Fabienne Testard, Olivier Spalla
ZUSAMMENFASSUNG

A complex between cetyltrimethylammonium bromide (CTAB) surfactant and silver bromide (CTASB) is recognized by NMR and X-ray photoelectron spectroscopy (XPS) to be the entity at the surface of gold nanorods, resulting from an in situ formation in the classical scheme of synthesis. It can thus be introduced directly along with the initial reactants in place of silver(I) salt to produce a new effective synthesis of these objects. Complementary XPS and quartz crystal microbalance (QCM) measurements on macroscopic gold surfaces confirm a strong adsorption of CTASB that is higher than that of CTAB and any other CTAX surfactants. The role of CTASB as a rod inducing agent by surface complexation is stressed.

MATERIALIEN
Produktnummer
Marke
Produktbeschreibung

Sigma-Aldrich
Silberbromid, 99%