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1. (WO2010122194) METHOD FOR OBTAINING METALLIC NANOPARTICLES

Pub. No.:    WO/2010/122194    International Application No.:    PCT/ES2010/070140
Publication Date: Fri Oct 29 01:59:59 CEST 2010 International Filing Date: Fri Mar 12 00:59:59 CET 2010
IPC: B01J 13/00
B22F 1/00
G01N 33/58
Applicants: CENTRO DE INVESTIGACIÓN BIOMÉDICA EN RED EN BIOINGENIERÍA, BIOMATERIALES Y NANOMEDICINA
UNIVERSITAT DE BARCELONA
GARCÍA GÜELL, Aleix
SANZ CARRASCO, Fausto
GUTIÉRREZ GONZÁLEZ, José María
GONZÁLEZ AZÓN, María del Carmen
Inventors: GARCÍA GÜELL, Aleix
SANZ CARRASCO, Fausto
GUTIÉRREZ GONZÁLEZ, José María
GONZÁLEZ AZÓN, María del Carmen
Title: METHOD FOR OBTAINING METALLIC NANOPARTICLES
Abstract:
The present invention relates to a method for obtaining nanoparticles of a metal selected from the group consisting of Ag, Pt, Pd and Au, which comprises the steps of: a) preparing an aqueous solution of a metallic salt and an aqueous citrate-salt mother solution, respectively; b) preparing an aqueous solution of dithionite salt, taking, as solvent, a portion of the aqueous citrate-salt mother solution obtained in step a); c) heating a portion of the aqueous citrate-salt mother solution to a temperature of between 40 and 70°C; d) mixing the metallic-salt solution of step a) with the solution of step c) once said temperature in step c) has been reached; and e) mixing the dithionite solution prepared in step b) with the solution obtained in step d); the dithionite:metal ratio being between 0.03*n and 2*n, in which n is the oxidation state of the metal of the metallic salt used.