The formation of free ions and electrophoretic mobility of Ag and Au nanoparticles inn-hexadecane-chloroform mixtures at low concentrations of AOT

被引：10

作者：

Bulavchenko, Alexander, I ^{[1
]}

Shaparenko, Nikita O. ^{[1
]}

Kompan'kov, Nikolay B. ^{[1
]}

Popovetskiy, Pavel S. ^{[1
]}

Demidova, Marina G. ^{[1
]}

Arymbaeva, Aida T. ^{[1
]}

机构：

[1] Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Branch, 3 Acad Lavrentiev Ave, Novosibirsk 630090, Russia

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2020年 / 22卷 / 26期

关键词：

SODIUM BIS(2-ETHYLHEXYL) SULFOSUCCINATE; SILVER NANOPARTICLES; AEROSOL OT; ELECTROSTATIC INTERACTIONS; REVERSE MICROEMULSIONS; CHARGE STABILIZATION; COLLOIDAL PARTICLES; NONPOLAR; MICELLES; BEHAVIOR;

D O I：

10.1039/d0cp02153a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrophoretic mobility of Ag and Au nanoparticles inn-hexadecane-chloroform mixtures was studied as a function of the chloroform content (from 0 to 100 vol%). The nanoparticles were stabilized by sodium bis-(2-ethylhexyl)sulfosuccinate (AOT, Aerosol OT) with a concentration of 2.5 x 10(-4)mol L-1. The obtained organosols were characterized by phase analysis light scattering, dynamic light scattering, transmission electron microscopy, diffusion-ordered spectroscopy of nuclear magnetic resonance, spectrophotometry and conductometry. The electrophoretic mobility of the nanoparticles sharply increased from 0 to 3.6 x 10(-9)m(2)V(-1)s(-1)with increasing chloroform content. The growth of the mobility was caused by an increase in the concentration of solvated AOT ions, which formed by the disproportionation reaction from uncharged molecules. Low concentrations of AOT and a considerable zeta potential (up to similar to 100 mV) made it possible to use the obtained organosols for the formation of electrostatically bound aggregates of Ag and Au with negatively charged SiO(2)nanoparticles.

引用

页码：14671 / 14681

页数：11