Chromatography
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Synthesizing Nanomaterials
Hello all I used to post on this site under the user name Trifluoroacetic.
I've been spending my time synthesizing Nanoprticles and taking UV/VIS measurements.
So far I have produced the following NP's:
Selenium NP's in chitosan
Gold NP's in chitosan
Gold NP's in PEI
Silver NP's via hydrazine reduction
I have plans to make core shell nanoparticles, SiO2 NP's, Quantum Dots, etc.
Attachment: phptP9xgm (59kB)
This file has been downloaded 673 times  
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Chromatography
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Here are more of the NP's that I have made.
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Chromatography
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Here is the UV/VIS Spectra for chitosan capped AuNP's
[file]28137[/file]
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bfesser
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Why the new user account?
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Chromatography
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I forgot my old password and couldn't sign in.
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bfesser
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U2U woelen, vulture, or Polverone. I'm sure that they can reset your password if you can verify
your identity.
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Fantasma4500
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once managed to make 1.5L of silver nanoparticles, as in divided in 1.5 litres of water..
think i used syrup on some silver salt, but ofcourse this might count as adding impurities which might be hard to seperate out..
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TheChemiKid
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How much sliver was in this suspension?
I would appriciate it if you could elaborate on the procedure.
When the police come
\( * O * )/ ̿̿ ̿̿ ̿'̿'̵͇̿̿з=༼ ▀̿̿Ĺ̯̿̿▀̿ ̿ ༽
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Fantasma4500
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im 100% unsure infact..
it could be either AgNO3 or AgCl2..
i cant really find video that used to describe the process, apparently the solution had to start kinda boiling and then the silver would ppt out
but im quite sure it was AgNO3 and syrup i used for it.. glucose should work aswell, because thats the stuff in syrup used for the reaction
anyhow, when i let the bottle stand around for long periods of time i can get a mm of ppt silver (pitch black) settling on the botom, its somewhat
dark, very brown, i doubt you can see through it especially as it was just tumbled about a day ago..
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Metacelsus
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Reducing silver salts with glucose may not give nano-sized particles. What were the specific conditions you used?
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Chromatography
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I've had good success with using 1mM of AgNO3 in distilled water with hydrazine sulfate approx 1% at 1-2mL. The hydrazine will reduce and stabilize
the AgNP's. The NP's are black when concentrated but yellow when diluted.
Adding a capping agent like chitosan, PVP or PVA will keep the particles from agglomerating.
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Fantasma4500
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well, im completely unable to catch any of the particles using a filter (which is on average 1µm) and they stay in suspension for many months, if not
nanoparticles then at least quite small ^^
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Mildronate
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There was days when it was just colodial chemistry not super duper nanomaterials 
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Chromatography
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What is the color of your silver NP's when diluted?
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Texium
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Thread Moved
21-11-2023 at 13:43 |
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