Can't we convert it into its powdered form without mere direct drying of the colloidal solution? There could be other methodologies to do so @ Alan F Rawle
Spray dry it. If the colloid suspension is too viscous for spray, dilute it first. Spray dryers can even be set up with electrostatic collection systems. I believe Buchi https://www.buchi.com/en/spray-drying
Joel Joy M. There are routes for making nano material in solids especially in catalysis. Absorb the precursor on an appropriate matrix and reduce. In this manner islands of nano material (usually metals) can be made separated sterically from other nano particles. Such materials as 5%Pd/C or 5%Au/SiO2 can be made with nano-dimensioned metals.
Robb Engle Please provide a SSA (by BET usually) of any nanomaterial made in this manner. I assume that the spray dried material will sit in a container and not blow away in the wind...
Joel Joy M. Take a look at:
https://www.researchgate.net/post/What_surfactants_are_the_best_for_preventing_aggregation_in_metal_nanoparticles
And this webinar (free registration required):
Dispersion and nanotechnology
https://www.malvernpanalytical.com/en/learn/events-and-training/webinars/W190528DispNanoMat
2 quotes from those greater than I:
2 quotes from those much greater than I:
'I think dry nanotechnology is probably a dead-end' Rudy Rucker Transhumanity Magazine (August 2002)
‘If the particles are agglomerated and sub-micron it may be impossible to adequately disperse the particle… ‘The energy barrier to redispersion is greater if the particles have been dried. Therefore, the primary particles must remain dispersed in water...’ J H Adair, E. Suvaci, J Sindel, “Surface and Colloid Chemistry” Encyclopedia of materials: Science and Technology pp 8996 - 9006 Elsevier Science Ltd. 2001 ISBN 0-08-0431526
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