nano materials are agglomerate fast after the synthesis process and with time ore some time its loss its nano size and aggregates specially the metal oxides
Hi!
I use surfactants as oleic acid to prevent (as possibly) the aggregation and avoid the growth of the nanoparticles.
Good luck!
Inorder to attain monodispersity in nano particles you can purify them by dialyzing using a dialysis membrane of respective molecular weight cuttoff and also if you can give proper washing using centrifuge. Other than this proper storage conditions for nanostructures also affect their size and prevent from agglomeration.
Keep the stabilized material(s) in colloidal suspension or atomized form. Do not dry or allow particles to come in contact with one another or surfaces. Stabilization by steric or charge stabilization routes. See also:
Nov 11th, 2008. Dispersion and nanotechnology http://tinyurl.com/hpywsge
and:
November 3rd, 2015 Adhesion and cohesion http://tinyurl.com/zwb2wlh
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