Zeta potential and degree of the aggregation of nanoparticles of the pyrogenic silica in the presence of the dissolved metal chlorides in the aqueous medium - L. S. Andriyko; V. I. Zarko; A. I. Marynin; V. V. Olishevskyi; A. A. Kravchenko; E. M. Demjanenko (Nanosystems, nanomaterials, nanotechnologies, 2015)