I am in need of using Manganese nanoparticles but not quite familiar with the synthesis. There is nanopowder of manganese oxide commercially available. In this case, could I disperse nanopowder very well to make Mn nanoparticles solution?
Nanopowders are solid powders of nanoparticles, often containing micron-sized nanoparticle agglomerates. These agglomerates can be redispersed using, for example, ultrasonic processing. Nanoparticle dispersions are suspensions of nanoparticles in water or organic solvents. These dispersions can be used as-is, or diluted with suitable (compatible) solvents. Nanoparticles in dispersions can sometimes settle upon storage, in which case they can be mixed before use. Some surface-functionalized nanoparticles (for example silver and gold) are available as solutions in water or organic solvents. These are "true" solutions, which should not settle or exhibit phase separation if properly stored.
Hi H.H Nguyen, in addition to previous answer, There is a difference between nano-powders and nano-particles. Nanopowders are the agglomerated or clustered nano-particles or agglomerated or clustered ultrafine-particles.
Could someone disperse nanopowder very well to make Mn nanoparticles solution?
Yes, you can use one of two methods (physical or chemical). If chemical method, you can use and choose the solvent to re-prepared your nano-particles from your powder stuff by dispersing the raw stuff (sonocation aided) or re-dissolve in the solvent (sol-gel method) by choosing solvent and emulsifying agent the re-calcining. Hope these information will be useful.
Thank you very much for your 2 responses from Ramakrishna Sukamanchi and Rudy Situmeang. I am clear now.
Prepare a solution from nanoparticles, e.g. alumina is mostly easy. Dissolve them in respective acid and voila you have a solution of e.g. AlCl3 and no particles left.
Your choice - solution or a dispersion. The latter, when you still want to have particles.
You may try to prepare a dispersion of nanoparticles in solvent adding, if necessary, dispersant and stabilizer. Sonication or wet-milling maybe used. But be aware getting down to nanosize or fully disperse primary particles is hard work, sometimes more or less impossible. If you have the option to use nanoparticles already in dispersion or prepare them in desired media is usually much easier.
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