MidLifeChemist
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Video on how to make gold nanoparticles
This video was filmed by one of my colleagues Lawton, who is getting his PhD in chemistry at the University of Florida.
https://www.youtube.com/watch?v=fVMorHYgO30
It shows how to make 3 different colors of gold nanoparticles, and why they have such amazing optical properties. It is not that difficult to do, and
you don't need that much HAuCl4 so it is not too expensive to do.
Enjoy, and I hope to hear if you enjoyed the video!
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j_sum1
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Nice work. There is a clarity in this vid that I have not seen in other Au nanoparticle videos.
What is alluded to early in the video but never explained is why this phenomenon is observed with gold but not other varieties of nanoparticles.
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Osmiridium
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A very nice short and informative video about a beautiful effect! And this without the need for any chemicals difficult to obtain.
I think there might be a little bit more in depth explanation, for instance why the sodium chloride causes the particles to stick together.
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pneumatician
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https://www.youtube.com/watch?v=snmIKpjg6Wo&t=39s
https://www.youtube.com/watch?v=m_ScOUNAdlM&t=2s
https://www.youtube.com/watch?v=1vr4OKlGwPA
https://www.youtube.com/watch?v=1vr4OKlGwPA
the second one... purple? blue??
is easy if you have the laser toy at 10k € :-)
[Edited on 2-5-2023 by pneumatician]
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Rainwater
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Would those colors keep well in sealed ampoules?
"You can't do that" - challenge accepted
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pneumatician
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you need to find a different repulsive force for every Au particle or else and more easy suspend it in a jelly or hardening transparent substance.
Maybe you find the perpetual motion making test :-)
Or the best is an ampoule with "nothing" inside it, only the colloidal Au. Perhaps if the ampoule is agitated the Au float a lot of time like a sand
tempest.
Or more cool, makes a "sand" clock, the sand of course is colloidal Au...
try to find a substance, chemical... to make repulsive or to avoid crowding Au particles, put in a dense liquid...
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pneumatician
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Gold colloidal, the spin of the electron particle... does it rotate clockwise or counter clockwise??? I'm far from a physics guru, but from what I
understood these spins are random???
is this guy in the right path??
https://www.youtube.com/watch?v=ARjseN3vArw
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Tsjerk
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Wooow! He needs 15-20% less colloidals in his body, so it must be doing something right? Totally makes sense, all electrons spinning the same way when
made in a spinning solution but in a magnetic field... Or something like that... Sure, sounds legit!
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clearly_not_atara
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Quote: Originally posted by j_sum1  | Nice work. There is a clarity in this vid that I have not seen in other Au nanoparticle videos.
What is alluded to early in the video but never explained is why this phenomenon is observed with gold but not other varieties of nanoparticles.
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Gold has the highest electronegativity and the highest half-cell potential for first oxidation of any metal. But platinum nanoparticles can also be
produced by reducing chloroplatinate with NaBH4:
https://www.mdpi.com/2079-4991/9/12/1719
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pneumatician
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https://archive.org/search?query=Practical+Colloid+Chemistry
https://elixa.com/colloidal-silver-a-closer-look/
in this links I think anyone can find solutions.
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Texium
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Thread Moved
20-11-2023 at 06:41 |
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