Xanthate Capping of Silver, Copper, and Gold Colloids

Autor:	O. Tzhayik, Jacob T. Klug, Efim G. Kovalev, Shlomo Efrima, Prashant D. Sawant
Rok vydání:	2002
Předmět:	Aqueous solution Dodecane Thermal decomposition Inorganic chemistry chemistry.chemical_element Surfaces and Interfaces Condensed Matter Physics Copper chemistry.chemical_compound Colloid chemistry Electrochemistry Molecule General Materials Science Xanthate Spectroscopy Dichloromethane
Zdroj:	Langmuir. 18:3364-3369
ISSN:	1520-5827 0743-7463
DOI:	10.1021/la015653n
Popis:	We cap silver, copper, and gold nanocolloids with long-chain alkylxanthates. In comparison to thiol capping, the particles are less hydrophobic and are stable in aqueous solutions for over a month, though being less stable than the corresponding oleate-capped particles. They can be transferred into relatively polar organic media (such as dichloromethane) but not into nonpolar solvents (such as dodecane). Unlike noncapped, thiol-capped, and oleate-capped colloids, they are temperature sensitive, as a result of the thermal decomposition of the xanthate molecule itself, and can be applied as thermally decomposable colloids. They demonstrate exceptional resistivity toward cyanide-induced corrosion by oxygen, when compared to noncapped or even to oleate-capped colloids. Xanthate capping enables the production of stable copper nanocolloids in aqueous solution under ambient conditions.
Databáze:	OpenAIRE
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