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Title: Xanthate capping of silver, copper, and gold colloids
Authors: Tzhayik, O.
Sawant, P. 
Efrima, S.
Kovalev, E.
Klug, J.T.
Issue Date: 16-Apr-2002
Citation: Tzhayik, O., Sawant, P., Efrima, S., Kovalev, E., Klug, J.T. (2002-04-16). Xanthate capping of silver, copper, and gold colloids. Langmuir 18 (8) : 3364-3369. ScholarBank@NUS Repository.
Abstract: 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.
Source Title: Langmuir
ISSN: 07437463
DOI: 10.1021/la015653n
Appears in Collections:Staff Publications

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