%0 Journal Article
%T Study of behavior of carboxylic magnetite core shell nanoparticles on a pH boundary.
%A Cacho C
%A Marková Z
%A Ševčík J
%A Zbořil R
%A Petr J
%J J Chromatogr A
%V 1364
%N 0
%D Oct 2014 17
%M 25219523
%F 4.601
%R 10.1016/j.chroma.2014.08.090
%X During the last years, several authors have focused on the characterization of the size and charge of the nanoparticles by capillary electrophoresis. However, considering that nanoparticles are generally suspended in a solvent different from those commonly used as background electrolytes (BGE), an appropriate characterization of the behavior of the nanoparticles in the sample-BGE interface is required, as this might affect the overall electrophoretic behavior of the nanoparticles. In the present work, we address the evaluation of the behavior of COOH-coated maghemite nanoparticles in the vicinity of a pH boundary. To do so, different suspensions of nanoparticles prepared in acid media were injected into a borate/NaOH pH 9.5 BGE. The formation and evolution of boundaries in the sample-BGE interface in such systems was modeled by computer simulation. A systematic evaluation of the effect that parameters such as the co-ion, the sample pH or the injection time have on the electrophoretic behavior of the nanoparticles was carried out.