Electrophoretic analysis of gold nanoparticles: size-dependent electrophoretic mobility of nanoparticles
- 1 January 2006
- journal article
- Published by Institution of Engineering and Technology (IET) in IEE Proceedings - Nanobiotechnology
- Vol. 153 (3), 47-53
- https://doi.org/10.1049/ip-nbt:20050043
Abstract
Efforts were made to realise a two-dimensional, on-line-coupled isotachophoresis-capillary zone electrophoresis system. The electrophoretic behaviour of gold nanoparticles was investigated with the idea that they could be used to improve the control of this electrophoretic set-up. The well-known citrate-ligated gold nanoparticles were not suitable for this application, because the ligand was desorbed, and the nanoparticle solutions were degraded. Therefore mercaptocarboxylic acids were used, because the chemisorption of thiols on the gold surface was improved. Isotachophoretic measurements were carried out with these nanoparticles. A size-dependent electrophoretic mobility was found according to theoretical predictions, and the surface and ζ-potential were discussed for the small particle range. A new method for concentration measurements of nanoparticles is presented by means of isotachophoresis.Keywords
This publication has 7 references indexed in Scilit:
- Continuous Free-Flow Electrophoresis of Water-Soluble Monolayer-Protected ClustersAnalytical Chemistry, 2005
- Molecular Approach to the Surface Potential Estimate of Thiolate-Modified Gold NanoparticlesThe Journal of Physical Chemistry B, 2002
- Automated Instrumentation for Comprehensive Isotachophoresis−Capillary Zone ElectrophoresisAnalytical Chemistry, 2000
- Synthesis and Characterization of Carboxylate-Modified Gold Nanoparticle Powders Dispersible in WaterLangmuir, 1999
- Effects of capillary temperature control and electrophoretic heterogeneity on parameters characterizing separations of particles by capillary zone electrophoresisAnalytical Chemistry, 1992
- Accurate analytic expressions for the surface charge density/surface potential relationship and double-layer potential distribution for a spherical colloidal particleJournal of Colloid and Interface Science, 1982
- Calculation of the electrophoretic mobility of a spherical colloid particleJournal of Colloid and Interface Science, 1966