I observed an assembly process of a ferromagnetic nanoparticles into a 3D cubic microstructure in aqueous media at 120°C. However the assembly process didn't involve any solvent evaporation or external magnetic force. Can anyone recommend or suggest the route for this formation?
Novuhulu Rhakho
A gaseous dispersed system of magnetic nanoparticles is by nature thermodynamically unstable (aggregates) and kinetically unstable (settles). Liquid dispersed systems of magnetic nanoparticles have the same property.
I am not 100% sure that I get your question. I had some experience with the self-assembly of magnetic nanoparticles. They initially had organic aliphatic trails, which prevented their immediate electro-static agglomeration. In my case, the challenge was to develop a homogenous dispersion of nanoparticles in a polymer matrix, while avoiding nanoparticle conglomeration due to electrostatics. It was an achievable goal. In your case, it sounds like you already accomplish your task: "ferromagnetic nanoparticles into a 3D cubic microstructure in aqueous media at 120°C", but need some advice on how to get rid of solvent (?). I would say that you can just heat it up in vacuum oven
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