Gold nanoparticle synthesis
HAuCl4-3H2O (5 mg) was dissolved in MeOH. To this was added 5 mg of metal-chelator and the mixture was bath-sonicated for 5 min to ensure proper mixing of Au and metal-chelator. Reduction of Au(III) to Au(0) was done by using 15-fold excess of NaBH4.
Immediate colour change was observed from bright yellow to red. Visible precipitation
was observed within a minute of addition of reducing agent. The precipitate had a red
colouration, however. The supernatant was removed and the precipitate was washed
twice with water and twice with MeOH to remove impurities.
from
Proc. Indian Acad. Sci. (Chem. Sci.), Vol. 115, Nos 5 & 6, October?December 2003, pp 613?619
http://www.ias.ac.in/chemsci/Pdf-OctDec2003/Pc3347.pdf
HAuCl4-3H2O (5 mg) was dissolved in MeOH. To this was added 5 mg of metal-chelator and the mixture was bath-sonicated for 5 min to ensure proper mixing of Au and metal-chelator. Reduction of Au(III) to Au(0) was done by using 15-fold excess of NaBH4.
Immediate colour change was observed from bright yellow to red. Visible precipitation
was observed within a minute of addition of reducing agent. The precipitate had a red
colouration, however. The supernatant was removed and the precipitate was washed
twice with water and twice with MeOH to remove impurities.
from
Proc. Indian Acad. Sci. (Chem. Sci.), Vol. 115, Nos 5 & 6, October?December 2003, pp 613?619
http://www.ias.ac.in/chemsci/Pdf-OctDec2003/Pc3347.pdf
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