(email: stephan.barcikowski@uni-due.de)

 

Laboratory: Technical Chemistry I

                   University of Duisburg-Essen and

                   Center for Nanointegration Duisburg-Essen (CENIDE) (Germany)

Address:     Universitaetsstr. 7

                   45141 Essen, Germany

 


Abstract

My group is conducting research in a broad range of different fields centered on nanoparticle synthesis by pulsed laser ablation in liquids (PLAL) as well as the successful integration of these materials in the fields of catalysis and biomedicine (youtube channel: nanofunction). In context of our biomedical research we use electrophoretic deposition (EPD) to coat biomaterials like electrodes or implants with nanoparticles in order to improve their biocompatibility (video). Neural electrodes, EPD-coated with Pt nanoparticles, were evaluated in in vivo studies where they showed superior electrophysiological properties in comparison to uncoated controls. The highly pure EDP process also profits from the high purity of the colloids obtained via PLAL as this method does not require any organic stabilizers for generation of colloidal nanoparticles. Furthermore, PLAL and EPD complement each other well, since PLAL allows fabrication of nanomaterials with a broad material variety and hence electrode and nanocoating can be made from identical materials.

Besides the coating of biomaterials we also strive to gain a better understanding of the EPD process itself. In this case totally ligand-free nanoparticles proof to be ideally suited reference materials to systematically study the influence of different ligands on the electrophoretic mobility and the deposition on surfaces. Furthermore, we aspire to fundamentally understand how the EPD process parameters affect the physical and chemical properties of coated 2D and 3D biomaterials.

 

Selected publications

  • S. Koenen, R. Streubel, J. Jakobi, K. Schwabe, J. K. Krauss and S. Barcikowski, Continuous Electrophoretic Deposition and Electrophoretic Mobility of Ligand-Free, Metal Nanoparticles in Liquid Flow, J. Electrochem. Soc., 162 (4), D174-D179 (2015).
  • C. Streich, S. Koenen, M. Lelle, K. Peneva and S. Barcikowski, Influence of ligands in metal nanoparticle electrophoresis for the fabrication of biofunctional coatings, Appl. Surf. Sci (2015), doi:10.1016/j.apsusc.2014.12.159.
  • S.D. Angelov, S. Koenen, J. Jakobi, H.E. Heissler, M. Alam, K. Schwabe, S. Barcikowski, J.K. Krauss, Electrophoretic deposition of ligand-free platinum nanoparticles on neural electrodes affects their impedance in vitro and in vivo with no negative effect on reactive gliosis, Journal of Nanobiotechnology, 14 (2016).
  • S. Koenen, C. Rehbock, H.E. Heissler, S.D. Angelov, K. Schwabe, J.K. Krauss, S. Barcikowski, Optimizing in Vitro Impedance and Physico-Chemical Properties of Neural Electrodes by Electrophoretic Deposition of Pt Nanoparticles, Chemphyschem, 18 (2017) 1108-1117.