Hi,
I was wondering why use centrifuge to collect nanoparticles. Also, if it doesn't work in collecting magenitc nanoparticles of size 5-10nm, what are some other simple and cost-effective ways to collect it.
Centrifugation is the simplest method to wash nanoparticles. You can use dialysis or ultracentrifugation but I personally do not like them. If centrifugation is not working it could be due to highly stable nanoparticles. You can always add at little bit of salt to reduce zeta potential.
Centrifugation is the simplest method to wash nanoparticles. You can use dialysis or ultracentrifugation but I personally do not like them. If centrifugation is not working it could be due to highly stable nanoparticles. You can always add at little bit of salt to reduce zeta potential.
Very good answers by Omar Gonzalez-Ortega and John Clarkson so far.
Actually, Centrifugation is not only to collect nanoparticles. The main issue arises with the nanoparticles synthesis is the size variability (say 5 nm to 80 nm) during preparation, (usually during chemical synthesis).
This inevitable situation is dealt with a process to recover more homogenous group of particles. Centrifugation is one of the process to obtain homogenous nanoparticles.
It is very simple physical method so it is widely accepted and practised.
Hi,
Because this way you may fractionate the particles; something that is barely possible so fast and quantitatively using other methods. Electrophoresis is one of the other options, more complicated though.
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