| NUKLEONIKA 2013, 58(1):39-42
SEDIMENTATION OF Fe2O3 AND METALLIC IRON NANOPARTICLES EXHIBITING BROWNIAN MOVEMENTPiotr Fornal1, Jan Stanek2 1 Cracow University of Technology, Institute of Physics, 1 Podchorążych Str., 30-083 Kraków, Poland 2 Jagiellonian University, Marian Smoluchowski Institute of Physics, 4 Reymonta Str., 30-059 Kraków, Poland Sedimentation of nanoparticles in water solutions was studied in situ by transmission Mössbauer spectroscopy in horizontal and vertical geometry. The studied specimens were Fe2O3 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. Close X |