TY - GEN A1 - Müller, Felix A1 - Torger, Bernhard A1 - Allertz, Peter J. A1 - Jähnichen, Klaus A1 - Keßler, Stefan A1 - Müller, Martin A1 - Simon, Frank A1 - Salchert, Katrin A1 - Mäurer, Haike A1 - Pospiech, Doris T1 - Multifunctional crosslinkable itaconic acid copolymers for enzyme immobilization T2 - European Polymer Journal N2 - UV-Crosslinkable itaconic copolymers are developed to provide new multifunctional materials for coatings which combine crosslinkable functionalities and the possibility to immobilize enzymes. The polymer-immobilized enzymes were used for water treatment to decompose persistent organic molecules. Introduction of suitable comonomers allows tailoring the mechanical and chemical properties for special applications. Copolymers containing MMA and itaconic anhydride were chosen because of the formation of long-term stable anhydride functionalities. These anhydride functionalities are employed to attach enzymes covalently. 4-Benzoylphenyl methacrylate is used as comonomer for UV-initiated crosslinking. Terpolymers are successfully obtained by radical copolymerization in solution. The copolymers are compared to poly(ethylene-alt-maleic anhydride) [P(EMA)] often used with respect to enzyme immobilization, activity and hydrolytic stability. The hydrolysis stability of the copolymers against water is studied by ATR-FTIR spectroscopy. Thin films are prepared on glass substrates in a layer-by-layer procedure by spin-coating. The layer formation is monitored by ATR-FTIR spectroscopy. UV-crosslinking of the copolymer films is performed taking the optimal irradiation dose that avoids polymer degradation. ATR-FTIR spectroscopy verifies the coupling reaction between amino groups of the enzyme and the anhydride groups on the surface of the crosslinked polymer film. The syringaldazine (4-hydroxy-3,5-dimethoxybenzaldehyde azine) test and 2,2´-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) assay demonstrate that the immobilized enzymes maintain their activities. The functional copolymers showed a significant effect in reduction of persistent organic pollutants in contaminated waste water. KW - ATR-FTIR spectroscopy KW - Crosslinking KW - Enzyme-immobilization KW - Itaconc acid KW - Methacrylate copolymer Y1 - 2018 U6 - https://doi.org/10.1016/j.eurpolymj.2018.03.014 VL - 102 SP - 47 EP - 55 ER - TY - GEN A1 - Krisponeit, Jon-Olaf A1 - Fischer, Simon A1 - Esser, Sven A1 - Moshnyaga, Vasily A1 - Schmidt, Thomas A1 - Piper, Louis F. J. A1 - Flege, Jan Ingo A1 - Falta, Jens T1 - The morphology of VO2/TiO2(001): terraces, facets, and cracks T2 - Scientific Reports N2 - Vanadium dioxide (VO2) features a pronounced, thermally-driven metal-to-insulator transition at 340 K. Employing epitaxial stress on rutile TiO2(001) substrates, the transition can be tuned to occur close to room temperature. Striving for applications in oxide-electronic devices, the lateral homogeneity of such samples must be considered as an important prerequisite for efforts towards miniaturization. Moreover, the preparation of smooth surfaces is crucial for vertically stacked devices and, hence, the design of functional interfaces. Here, the surface morphology of VO2/TiO2(001) films was analyzed by low-energy electron microscopy and diffraction as well as scanning probe microscopy. The formation of large terraces could be achieved under temperature-induced annealing, but also the occurrence of facets was observed and characterized. Further, we report on quasi-periodic arrangements of crack defects which evolve due to thermal stress under cooling. While these might impair some applicational endeavours, they may also present crystallographically well-oriented nano-templates of bulk-like properties for advanced approaches. KW - Vanadium dioxide (VO2) KW - rutile TiO2(001) KW - metal-to-insulator transition KW - morphology KW - crystallography KW - low-energy electron microscopy (LEEM) KW - low-energy electron diffraction (LEED) KW - scanning probe microscopy Y1 - 2020 U6 - https://doi.org/10.1038/s41598-020-78584-9 SN - 2045-2322 VL - 10 ER - TY - GEN A1 - Martienssen, Marion A1 - Simon, J. A1 - Schulze, R. T1 - Untersuchungen zum Einsatz von aufbereiteter Kfz-Kühlerflüssigkeit als organische C-Quelle bei der biologischen Sickerwasserbehandlung T2 - Korrespondenz Abwasser Y1 - 1997 SN - 0341-1540 VL - 44 IS - 9 SP - 1622 EP - 1627 ER - TY - GEN A1 - Martienssen, Marion A1 - Simon, J. T1 - Reinigung von Abwasser aus Emulsionsspaltanlagen durch kombinierten Einsatz von biologischer Behandlung und chemischer Naßoxidation T2 - Korespondenz Abwasser Y1 - 1997 SN - 0341-1540 VL - 44 IS - 1 SP - 110 EP - 114 ER - TY - GEN A1 - Martienssen, Marion A1 - Simon, J. T1 - Effect of activated carbon on the biological treatment of oil-water emulsions Y1 - 1996 ER - TY - GEN A1 - Martienssen, Marion A1 - Schulze, R. A1 - Simon, J. T1 - Capacities and limits of three different technologies for the biological treatment of leachate from solid waste landfill sites Y1 - 1995 ER - TY - CHAP A1 - Martienssen, Marion A1 - Schulze, R. A1 - Heinke, M. A1 - Pohl, W. A1 - Simon, J. T1 - Leistungen und Leistungsgrenzen unterschiedlicher biotechnologischer Verfahren für die Behandlung von Deponiesickerwasser T2 - 11. Jahrestagung der Biotechnologen, Nürnberg, 24. bis 26. Mai 1993, Kurzfassungen Y1 - 1993 SP - 43 EP - 44 PB - DECHEMA CY - Frankfurt am Main ER -