Electrosurface Analysis

Electrosurface Analysis

Mission

Electrosurface properties of polymers are the key to various biointerfacial effects. Examples comprise the helix-coil transition in poly(L-glutamic acid) brushes, the activation of the kinin system by negatively charged surfaces and the heparin-like activity of negatively charged macromolecules. Physico-chemical studies are dedicated to the detailed characterization of the interfacial charge formation at polymers in aqueous electrolyte solutions. Focus is put on the charge formation by unsymmetrical ion adsorption, interrelations between charging and structure of biopolymers at interfaces and on the influence of charge on structural and dynamic properties of supported lipid bilayer membranes. The research on electrosurface phenomena also includes the development of new analytical techniques.

Group Members

Selected Publications

  1. Zimmermann, R.; Freudenberg, U.; Schweiß, R.; Küttner, D.; Werner, C.
    Hydroxide and hydronium ion adsorption - A survey mehr
    Current Opinion in Colloid and Interface Science 15 (2010) 196-202

  2. Duval, J. F. L.; Zimmermann, R.; Cordeiro, A. L.; Rein, N.; Werner, C.
    Electrokinetics of diffuse soft interfaces. IV. Anaylsis of streaming current measurements at thermoresponsive thin films mehr
    Langmuir 25 (2009) 10691-10703

  3. Zimmermann, R.; Rein, N.; Werner, C.
    Water ion adsorption dominates charging at nonpolar polymer surfaces in multivalent electrolytes mehr
    Physical Chemistry, Chemical Physics 11 (2009) 4360-4364

  4. Zimmermann, R.; Küttner, D.; Renner, L.; Kaufmann, M.; Zitzmann, J.; Müller, M.; Werner, C.
    Charging and structure of zwitterionic supported lipid bilayer membranes studied by streaming current measurements, fluorescence microscopy, and ATR-FTIR spectroscopy mehr
    Biointerphases 4 (2009) 1-6

  5. Dukhin, St.; Zimmermann, R.; Werner, C.
    Charge density distribution at interfaces between polyelectrolyte layers and aqueous solutions - Experimental access and limitations of traditional electrokinetics mehr
    Journal of Colloid and Interface Science 328 (2008) 186-195

  6. Zimmermann, R.; Osaki, T.; Gauglitz, G.; Werner, C.
    Combined microslit electrokinetic measurements and reflectometric interference spectroscopy to study protein adsorption processes mehr
    Biointerphases 2 (2007) 159-164

  7. Freudenberg, U.; Zimmermann, R.; Schmidt, K.; Behrens, S.-H.; Werner, C.
    Charging and swelling of cellulose films mehr
    Journal of Colloid and Interface Science 309 (2007) 360-365

  8. Härtl, A.; Garrido, J. A.; Nowy, S.; Zimmermann, R.; Werner, C.; Horinek, D.; Netz, R.; Stutzmann, M.
    The ion sensitivity of surface conductive single crystalline diamond mehr
    Journal of the American Chemical Society 129 (2007) 1287-1292

  9. Dukhin, St.; Zimmermann, R.; Werner, C.
    Surface conductivity reveals counterion condensation within grafted polyelectrolyte layers mehr
    Journal of Physical Chemistry / B 111 (2007) 979-981

  10. Zimmermann, R.; Osaki, T.; Schweiß, R.; Werner, C.
    Electrokinetic microslit experiments to analyse the charge formation at solid/liquid interfaces mehr
    Microfluidics and Nanofluodics 2 (2006) 367-379

  11. Zimmermann, R.; Osaki, T.; Kratzmüller, Th.; Gauglitz, G.; Dukhin, St.; Werner, C.
    Electrostatic Switching of Biopolymer Layers. Insights from Combined Electrokinetics and Reflectometric Interference mehr
    Analytical Chemistry 78 (2006) 5851-5857

  12. Dukhin, St.; Zimmermann, R.; Werner, C.
    Intrinsic Charge and Donnan potentials of grafted polyelectrolyte layers determined by surface onductivity data mehr
    Journal of Colloid and Interface Science 274 (2004) 309-318

  13. Zimmermann, R.; Dukhin, S.S.; Werner, C.
    Electrokinetic Measurements Reveal Interfacial Charge at Polymer Films Caused by Simple Electrolyte Ions mehr
    Journal of Physical Chemistry 105 (2001) 8544-8549

 
Electrosurface Analysis
Electrosurface Analysis
 

Departments

Institute of Biofunctional Polymer Materials

Fields of Work

Charging and Structure Formation at Biointerfaces

Electrosurface Analysis