Method for producing metal nanoparticles

C - Chemistry – Metallurgy – 12 – P

Patent

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C12P 3/00 (2006.01)

Patent

CA 2656323

This invention provides a method for producing a composition comprising colloidal nanoparticles of metals including silver, gold, zinc, mercury, copper, palladium, platinum, or bismuth, by contacting a metal or metal compound with bacteria. An embodiment of the method comprises a step of incubating probiotic bacteria with an aqueous solution comprising at least 4 mM of a silver or gold salt. A resulting nanosilver-containing composition is useful as a highly efficient antimicrobial agent, for instance when impregnated onto a carrier, or an algicide agent or a herbicide agent.

La présente invention concerne un procédé de production d'une composition contenant des nanoparticules colloïdales de métaux, incluant l'argent, l'or, le zinc, le mercure, le cuivre, le palladium, le platine, ou le bismuth, grâce à la mise en contact d'un métal ou d'un composé métallique avec des bactéries. Un mode de réalisation du procédé comporte une étape qui consiste à incuber des bactéries probiotiques avec une solution aqueuse contenant au moins 4 mM d'un sel d'argent ou d'un sel d'or. Une composition résultante contenant du nano-argent se révèle utile en tant qu'agent antimicrobien fortement efficace, notamment lorsqu'elle est imprégnée sur un support, ou en tant qu'agent algicide ou agent herbicide.

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