Sedimentation of nanoparticles in water solutions was studied in situ by transmission Mossbauer spectroscopy in horizontal and vertical geometry. The studied specimens were Fe_{2}O_{3} of a commercial pigment and metallic iron nanoparticles in slurry used in a water purification technology. The sedimentation is selective and leads to the gradual removing of the bigger particles from a solution. The iron nanoparticles in the solution are relatively chemically stable until, due to the drying, the sediment becomes exposed to the air.
keywords in English:
Brownian movement, nanoparticles, sedimentation
affiliation:
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
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