I am looking to purify a solution of silver nanowires that have some nanoparticle impurities. I would like to use the centrifuge to pull down the nanowires and leave the nanoparticles in the supernatent. How can I calculate the force needed to do this? Thank you.
Dear Michael,
To answer your question, we have to make clear of two concepts.
Firstly when we use a centrifuge instrument, what parameters need to be set are speed and duration. The speed of a centrifuge uses the unit of g rather RPM. There is a conversion between them. Please see the following link.https://www.labtools.us/centrifugation-speed-rpm-to-g-conversion/
Secondly how to calculate the centrifugal forces is quite complicated. Please see the following link which gives you excellent explanations.
https://en.m.wikipedia.org/wiki/Centrifugal_force
Finally regarding the separation of silver nanowires and residual nanoparticles from your solution, you can use IPA solvent as adding your solution to get pure nanowires by setting speed between 4000g to 6000g for duration of 30 mins. The parameters could very much depend on the diameter and length of your nanowires and how big size of your residual nanoparticles. Hope it helps.
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