While doing the centrifuge process I didn't get any precipitation. It's in a solution form only... If I want to get a particle what can I do for further process?
If it's really small and nano, it will be yellow and not sediment. Indeed if it sediments, it's not colloidal or nano (< 100 nm). See:
September 2nd, 2015 Silver colloids and invisible ink
https://www.brainshark.com/malvern/vu?pi=560497681&b=1&tx=120486&c1=22
and:
Nov 11th, 2008. Dispersion and nanotechnology http://tinyurl.com/hpywsge
If it's small and effectively spherical then it'll be a transparent yellow and looking like a solution. See slide 43 in:
February 18th, 2016 Metal colloids - their preparation, application and characterization
https://www.brainshark.com/malvern/vu?pi=529368070&b=1&tx=120486&c1=22
No amount of centrifuging will cause precipitation in this case.
Hi
for small NPs, you should use ultra-centrifuge. However, you may not be able to capture all of the particles and the amount of loss is indirectly proportional to the size of NPs.
BR
Mohammad
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