Title: Isotachophoretic measurements of luminescent semiconductor nanocrystals
Authors: Wendelin Bucking, Jurgen Riegler, Christian Rettenmaier, Thomas Nann
Addresses: Freiburg Materials Research Center (FMF), Albert-Ludwig University Freiburg, Stefan-Meier-Strasse 21, D–79104 Freiburg, Germany. ' Freiburg Materials Research Center (FMF), Albert-Ludwig University Freiburg, Stefan-Meier-Strasse 21, D–79104 Freiburg, Germany. ' Freiburg Materials Research Center (FMF), Albert-Ludwig University Freiburg, Stefan-Meier-Strasse 21, D–79104 Freiburg, Germany. ' Freiburg Materials Research Center (FMF), Albert-Ludwig University Freiburg, Stefan-Meier-Strasse 21, D–79104 Freiburg, Germany
Abstract: 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.
Keywords: semiconductor nanocrystals; isotachophoresis; laser-induced fluorescence detection; surface coverage; ligand; colloidal stability; nanocrystal solutions concentration; security; nanotechnology; luminescence; electrophoretic mobility.
International Journal of Nanotechnology, 2007 Vol.4 No.3, pp.298 - 308
Published online: 01 May 2007 *
Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article