Forum 2.0

Full member
Hi Big Nano-Friends!

     I've produced my first nanoparticles of gold using the Turkevich process. I tried to concentrate them down because I need to fit about 500 miligrams into 20 - 50 ml of space, perhaps even dry them out. Sound easy? Well, I boiled my one liter reaction solution down to about 100 ml in a two liter beaker. The solution at that point turned from red to grey with black powder and gold flake like layers floating on top. I think it's no longer 20 nm size range particles at all.
     Can these Turkevich process size range nano-particles (20nm) be centrifuged to the bottom of a test tube? I read a patent refering to a process for making the same size and also spherical nanoparticles using monosodium glutamate instead of trisodium citrate. To concentrate the nanoparticles for analysis, they put the solution into a freezer and froze them to destabilize the nanoparticles and make them more or less fall to the bottom of the beaker so that they could be retrieved for centrifuging. Could nanoparticles made using the Turkevich process be frozen to make them fall out of solution in the same way? And then centrifuged out, if simply centrifuging is impossible?
     Yes I know, I've yet arrived and ask so many questions =-) Is there any Turkevich nanoparticle concentration specialists here?

Best Regards,
                      Paul

SDC10565.JPG

SDC10567.JPG

You need to be a member of The International NanoScience Community - Nanopaprika.eu to add comments!

Join The International NanoScience Community - Nanopaprika.eu

Email me when people reply –

Replies

  • Full member
    Try biphasic reduction method and ppt using methanol.
    • Full member
      Do you have any patents or other educational material? I couldn't find anything in the internet with a reference to such processes.
This reply was deleted.