Process for producing gold nanoparticles

Details Process for producing gold nanoparticles Process for producing gold nanoparticles

2007-06-19

2007-06-19

Wyszomierski, George (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

C075S371000, C977S777000

Reexamination Certificate

active

10886627

ABSTRACT:
Gold nanoparticles having a particle size of 4-15 nM are synthesized by the reduction of hydrogen tetrachloroaurate (III) trihydrate using a suitable reducing agent such as sodium citrate in the presence of unmodified α, β or γ-cyclodextrin. The particle size is dependent upon the type and concentration of cyclodextrin and the reducing agent concentration. Gold nanoparticles having a particle size of 2-4 nM are produced by the reduction of hydrogen tetrachloroaurate (III) trihydrate using sodium borohydride in the presence of cyclodextrins.

REFERENCES:
patent: 6025202 (2000-02-01), Natan
patent: 6361944 (2002-03-01), Mirkin et al.
patent: 2002/0177143 (2002-11-01), Mirkin et al.
patent: 2003/0108612 (2003-06-01), Xu et al.
Michels, Jasper J. et al., “Dendrimer-cyclodextrin assemblies as stabilizers for gold and platinum nanoparticles”, J. Chem. Soc., Perkin Trans. 2, pp. 102-105, published Nov. 19, 2001.

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