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The size determination of nanoparticles in aqueous solution is important in bio- and nanotechnology. The sizes of particles in aqueous solution are determined by particle tracking analysis (PTA) with the Stokes–Einstein assumption from diffusion coefficient measurements. However, the interactions between particles affect the particle size determined by PTA. In this work, we observed particle/electrolyte...
The motion of spherical particles in liquid phases was investigated using a two-dimensional particle tracking analysis (2D-PTA) method. The analysis of four different materials with this method revealed two different types of particle movements occurring simultaneously: Brownian diffusion and sedimentation. When these two different displacements occurred simultaneously, in the case of particles with...
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