Keywords: semiconductor nanocrystals, isotachophoresis, laser-induced fluorescence detection, surface coverage, ligand, colloidal stability, nanocrystal solutions concentration, security, nanotechnology, luminescence, electrophoretic mobility
Isotachophoretic measurements of luminescent semiconductor nanocrystals
Luminescent semiconductor nanocrystals were derivatised by mercaptocarboxylic acids. A direct synthesis in the solution of the ligand and a post-synthesis ligand exchange method was used. The two methods were compared and evaluated by isotachophoresis. The electrophoretic mobility, as well as the colloidal stability and the coverage with the ligand, were determined. An alternative method for concentration estimation of nanocrystals by isotachophoresis was introduced.