Make Colloidal Gold from Gold Chloride
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Uploaded by kephranet on Apr 2, 2009
Here is a demonstration of producing colloidal gold (gold nanoparticles) using the Turkevich method. The entire process took a mere 10 minutes, with only gold chloride, distilled water, and sodium citrate. Sodium Citrate is a common food additive. More info at www.cgcsforum.com
Uploader Comments (kephranet)
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All Comments (73)
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will this work with silver nitrate instead of the gold compound?
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Fantastic. Thank you for that :)
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My understanding was that it was boiling - and that it continued to boil throughout the process.
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kephranet man!!! you are a genius!!! thanks a lot for you information!!! God bless!
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What is the temperature while stirring?
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guymark 6 months ago
@guymark Either HAuCl4 or AuCl3 work. Probably any chloride of gold will work though.
My supplier (Salt Lake Metals) says its AuCl3.
kephranet 6 months ago
Protect that vial, man! The gold chloride will react with the light!!
mvszao 7 months ago
@mvszao The manufacturer says it is not light sensitive, and I have had no problem storing it unprotected.
kephranet 7 months ago
from my studies i would suggest trying sodium tannate - let me know how that works for you
33vibe 9 months ago
@33vibe
I know some people use tannic acid as a reducing agent. I do not have any sodium tannate, but If I can procure some, I will try it. What do you think it does better than sodium citrate? So far, I've had the best results using sodium carbonate plus maltodextrin. There are quite a few reagents that work pretty well.
kephranet 9 months ago