Yang, Hyun-Kwan:
ISBN 9783899598117

Polyelectrolyte Complexes and Multilayers at Solid Surfaces via Polymer Brushes. Oberflächenchemie und -physik von Mikrosystemen Bd. 8 # Pb., Großformat (24x17), 160 S., 80 Abb., davon 7 in Farbe, 13 Tab.

polyelectrolyte (PEL)
Weak PEL
Weak polyelectrolyte
Strong PEL
Strong polyelectrolyte
Overcompensation
Trojan Horse Mechanism

This thesis describes research that aimed at a better understanding of the parameters and mechanisms that govern the adsorption of polyelectrolytes on an oppositely charged polyelectrolyte brush. The work was motivated through earlier results described by Zhang, who observed for some cases a very strong templating effect of a PEL brush when this brush was used as a substrate for the so-called layer-by-layer deposition process.
It was found that complex formation is controlled by a subtle interplay of various parameters. Layer formation strongly depends on the number of charges, the solubility (swellability) of the complex and the presence of hidden charges. "Overcompensation" can occur for kinetic reasons (irreversible processes) in weak-strong systems and the release of previously hidden charges in weak-weak system. For the latter phenomenon we coined the term "Trojan Horse" mechanism due to a certain similarity to this "strategy" described in the Greek mythology.


Dr. Hyun-Kwan Yang finished his Masters degree in 2001 at Hannam University, South-Korea. For his Masters thesis, he worked in laboratory of Prof. Dr. Kwang-Sup Lee and studied on the TPA microfabrication. He then joined in the laboratory of Prof. Dr. Jürgen Rühe, Microsystems Engineering at the University of Freiburg for his Ph.D on polyelectrolyte brushes.

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