化工儀器網(wǎng)
技術(shù)文章
Separating excess surfactant from silver and gold nanoparticles in micellar concentrates by means of
閱讀：353 發(fā)布時(shí)間：2018-3-29作者： A. I. Bulavchenko, M. G. Demidova, P. S. Popovetskiy, T. Yu. Podlipskaya, P. E. Plyusnin
Nikolaev Institute of Inorganic ChemistryRussian Academy of Sciences, Siberian Branch, Novosibirsk, Russia
摘要：It is shown by physicochemical means (IR Fourier spectroscopy, CHN-analysis with preliminary sorption of surfactant on SiO2) that the content of sodium bis(2-ethylhexyl)sulfosuccinate (AOT) in an electrophoretic concentrate remains unchanged during the electrophoretic concentration of silver and gold nanoparticles. Diluting the concentrate and carrying out the second stage of electrophoresis reduces the concentration of surfactant from 0.25 to 0.015 M while maintaining the mass concentration of nanoparticles. Nanoparticles in organosols before and after electrophoresis are characterized by means of photon correlation spectroscopy, phase analysis light scattering, and spectrophotometry. Conducting films on glass substrates are obtained from concentrates with a different contents of surfactant via water–alcohol treatment and thermolysis.