M. Smoluchowski Institute of Physics, Jagiellonian University, 11 Prof. S. Łojasiewicza Str., 30-348 Kraków, Poland, Tel.: +48 12 664 4697, Fax: +48 12 664 4905
Fornal Piotr
Institute of Physics, Technical University of Cracow, 1 Podchorążych Str., 30-084 Kraków, Poland
Stanek Jan
M. Smoluchowski Institute of Physics, Jagiellonian University, 11 Prof. S. Łojasiewicza Str., 30-348 Kraków, Poland, Tel.: +48 12 664 4697, Fax: +48 12 664 4905
The mobility of the 110 nm-Fe2O3 particles in a viscous sucrose solution depends on the concentration of the nanoparticles. When the average particle–particle nearest neighbor distance is less than 250 nm, the particle interaction slows down their mobility. When is more than 170 nm, the small mobility of nanoparticles does not depend on their concentration. The critical distance is approximately equal to 2Rh = 260 nm, where Rh is the hydrodynamic radius, determined by the dynamic light scattering (DLS) method.
