个人简介

02/2015 Institutsleiter Fraunhofer-Institut für Angewandte Polymerforschung, Lehrstuhl für Polymermaterialien und Polymertechnologie, Universität Potsdam 11/ 2008 Stellv. Wissenschaftlicher Direktor des DWI –Leibniz-Institut für Interaktive Materilaien e.V. und Inhaber des Lehrstuhls für Makromolekulare Materialien und Oberflächen, RWTH Aachen 12/2006 Lichtenberg-Professor für Kolloidchemie, Universität Bayreuth 2004 - 2006 Wissenschaftlicher Assistent am LS Physikalische Chemie II, Universität Bayreuth (Prof. G. Krausch) 2002 - 2004 Postdoc am Department of Polymer Science & Engineering, University of Massachusetts, Amherst, USA (Prof. T.P. Russell). "Self-Assembly of Functionalized Nanoparticles at liquid/liquid Interfaces". 1998 - 1999 Zentrale Forschung Physik der Bayer AG, Leverkusen 1996 - 1997 Department of Materials Science & Engineering, Cornell University, Ithaca, NY, USA (Prof. C.K. Ober) "Synthesis of Semifluorinated Block Copolymers and their Application in Thin Films". Ausbildung 2007 Habilitation im Fach Physikalische Chemie, Universität Bayreuth: "Template-Directed Self-Assembly of Nanoparticles". 1999 - 2002 Doktorarbeit in Makromolekularer und Physikalischer Chemie (Prof. G. Krausch, Prof. A.H.E. Müller, Universität Bayreuth): "Self-Assembly of Block Copolymers in External Fields". 1998 - 1999 Diplomarbeit (Prof. R. Stadler, Prof. B.A. Wolf, Universität Mainz; Dr. K. Reihs, Bayer AG): "Seitenkettenfluorierte Blockcopolymere als molekulare Funktionsschichten an Polymeroberflächen". 1993 - 1998 Chemiestudium an der Johannes Gutenberg-Universität Mainz und der Cornell University, Ithaca, NY, USA 1992 - 1993 Wehrdienst 1992 Abitur Preise und Stipendien 2006 Lichtenberg-Professur der VolkswagenStiftung 2006 Emmy Noether-Nachwuchsgruppe der DFG 2005 Wissenschaftspreis des Universitätsvereins der Universität Bayreuth 2003 - 2004 Stipendium der Max Kade-Foundation 2002 Preis der Stadt Bayreuth für hervorragende naturwissenschaftliche Dissertation 1999 - 2001 Kekulé-Stipendium des Fonds der Chemischen Industrie 1996 - 1997 DAAD-Auslandsstipendium

研究领域

Makromolekulare Materialien und Oberflächen

Electrostatic interactions to direct nanoparticle self-assembly Block copolymer nanostructures are used as nanoscopic templates for the placement of nanoparticles. This is achieved by electrostatic interactions and enthalpic effects. Structural development and comprehensive physical characterization of the resulting nanoparticle assemblies is performed using scanning probe and x-ray scattering techniques. Contact: T. Wagner Influence of selective nanoparticles on the morphology of thin block copolymer films The phase-separated micro domains of block copolymers show different morphologies that can be manipulated by electric fields and selective incorporation of nanoparticles. The aim is to investigate the influence of selective nanoparticles on the morphology of thin, phase-separated block copolymer films and the properties of this system in external electric fields. Contact: C. Lewin Effects of electric fields on phase transitions in block copolymers The microstructure of block copolymers can be manipulated by application of electric fields. Electric fields are known to induce order-order transitions and to stabilize the disordered phase in concentrated solutions of lamellae forming block copolymers. The effect of dc electric fields on phase transitions in microphase separated systems is analyzed by performing in-situ birefringence measurements, and time-resolved small angle X-ray scattering (SAXS). Contact: C. Kathrein Alignment of block-copolymer morphologies via topographical guidance using controlled solvent vapor annealing We aim at defect free alignment of block-copolymer structures by a special topographical guidance and controlled solvent vapor annealing. The latter is fast and provides a huge variety of possibilities to tune the generated morphologies. A high degree of reproducibility is ensured by controlling temperature of the sample and solvent, solvent flow and thickness of the polymer films via in-situ ellipsometry measurements. Contact: A. Stenbock-Fermor FUNCTIONAL SURFACES AND MATERIALS Fundamental aspects of fluorinated monolayers and their relevance as functional coatings The project aims at gaining further insight into the formation processes of self-assembling monolayers (SAMs) and to improve the capabilities of surface functionalization thereof. SAMs bearing fluoroalkylated moieties have been proven to show unique properties in terms of wetting behavior and structural characteristics and differ substantially from their non-fluorinated counterparts. For example specially structured super hydrophobic surfaces allow for liquid slippage. The use of binary mixed SAMs deposited from solutions of fluoroalkylated thiols with different chain length are a model system to study the influence of small-scale surface roughness on liquid wetting. Contact: J. Knauf, L. Reddemann Glycopolymer brushes for specific protein binding In collaboration with the Elling group (Biomaterials, RWTH Aachen) we produce multiple surface gradients of glycopolymer brushes with well-defined structures aiming at specific binding of cancer marker proteins. Contact: H. Park Chemically modified proteins for surface functionalization We are monitoring the potential of conjugates of specific functional molecules with proteins for the functionalization of surfaces. Here, the protein moiety provided by the Schwaneberg group (Biotechnology, RWTH Aachen) serves as anchor for the attachment of the respective functionality. Besides different conjugation strategies, the binding of the conjugates to various surfaces and the resulting surface properties are investigated. Contact: B. Stomps Preparation of wrinkled surfaces We develop nanostructured wrinkled surfaces based on surface instabilities induced in double layer systems composed of materials with different mechanical properties. The self-organization occurs as a result of a mismatch in expansion of a hard thin layer and the elastomeric substrate. Parameters which control the surface-morphology are the thickness of the film, the applied stretching and also relief structures. The modification of such structures through defects leads to star-like wrinkled SiO2-sufaces on the nanoscale. Contact: P. Wünnemann Wrinkle-assisted particle assembly and design Nanostructured wrinkled surfaces are used as templates for assembly of (bio)nanoparticles, i.e. viruses, microgels and inorganic colloids. By different printing methods assembled particles are transferred onto flat surfaces. In the case of microgels, anisotropic strings were obtained by crosslinking individual particles and redispersing them in an appropriate solvent. Surface active patchy particles were designed by a facile template-based approach where the immersion of the particles into the wrinkle grooves allows tuning the particles patchiness. The resulting patchy particles are suitable as emulsion stabilizers. Contact: R. Brüx, M. Schürings Protein-polymer conjugates for self-assembled hybrid membranes Hybrid materials composed of polymers and proteins are used to produce advanced membrane materials. In one approach proteins incorporated into cross-linked polymer matrices are used as sacrificial templates for the generation of defined holes. In another approach, engineered channel proteins are directly employed to yield functional pores in the membrane (in collaboration with the Schwaneberg group, Biotechnology, RWTH Aachen). Protein-polymer bioconjugates are synthesized through controlled polymerization from the lysine residues. Subsequently, the conjugates are self-assembled at fluid interfaces to form membranes. Contact: H. Charan, U. Glebe, M. Messerle, T. Mirzaeigarakani Nanoparticle-polymer conjugates Hairy nanoparticles composed of a solid core and a polymer brush shell. ATRP, RAFT, NMP and anionic polymerizations were performed from the silica nanoparticles surface. The resulting particles are evaluated with respect to their self-assembly at fluid interfaces, temperature responsiveness, and use in switchable Pickering emulsions. Contact: L. Wu Synthesis of particles with photoresponsive self-assembly behavior The photoswitchable, supramolecular interaction between cyclodextrin and azobenzene (collaboration with Ravoo group, Münster) is used to synthesize photoresponsive materials self-assembled from anisotropic particles. Using established printing methods, patchy particles with different functionalities are synthesized and investigated with respect to their photophysical self-assembly behavior. Contact: D. John ENCAPSULATION AND RELEASE Biomimetic synthesis of hydroxyapatite capsules Hollow capsules of hydroxyapatite are synthesized using protein stabilized o/w emulsions as templates. Furthermore, the mineral phase – hydroxyapatite (HAp) – can be doped with cations (e.g. magnesium, sodium or strontium) to introduce additional functionality. Using molecular dynamic (MD) simulations in collaboration with the Schwaneberg group we investigate the protein adsorption and denaturation behavior at fluid interfaces and are able to explain why proteins not associated in nature with mineralization support it in an artificial environment. Contact: M. Richter Enzyme-catalyzed synthesis of silica capsules In this project, we use Lysozyme, a hydrolase with high interfacial activity, in a Pickering emulsion templated approach to form silica capsules. Altering emulsification method, mixing sequence and ration between the o/w phases results in protein-silica hybrid capsules with controlled size and morphology. Besides protein, also polymers bearing amine groups are reported to catalyze the silicification. Therefore, PNIPAAm microgels with high interfacial activity are used for the catalytic synthesis of silica capsules. Contact: H. Wang Microgels for biomedical applications When designing materials for biomedical applications such as drug delivery or tissue engineering, nature is an inspiring example for creating responsive, intelligent, and interactive materials. Microgels are loosely crosslinked, synthetic polymer networks that hold several features of natural systems: They respond to their environment and can change their properties reversibly, which is why microgels are being used as drug delivery systems, synthetic tissue, or cell growth templates. We design nature-inspired polymers to be crosslinked to defined microgel particles, which serve as building blocks for responsive superstructures, applying methods like template-guided assembly or microfluidics. Contact: M. Nguyen-Kim

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Ferritin: A Versatile Building Block for Bionanotechnology G. Jutz, P. van Rijn, B. Santos De Miranda, A. Böker Chem. Rev., 115, 1653-1701 (2015) doi:10.1021/cr400011b Glycopolymer Brushes for Specific Lectin Binding by Controlled Multivalent Presentation of N-acetyllactosamine Glycan Oligomers H. Park, R.R. Rosencrantz, L. Elling, A. Böker Macromol. Rapid Commun., 36, 45-54 (2015) doi:10.1002/marc.201400453 Virus-SiO2 and Virus-SiO2-Au Hybrid Particles with Tunable Morphology P. van Rijn, L.S. van Bezouwen, R. Fischer, E.J. Boekema, A. Böker, U. Commandeur Part. Part. Syst. Charact., 32, 43-47 (2015). doi:10.1002/ppsc.201400068 A fluorescent hydrogel-based flow cytometry screening platform for hydrolytic enzymes C. Pitzler, G. Wirtz, L. Vojcic, S. Hiltl, A. Böker, R. Martinez, U. Schwaneberg Chemistry & Biology, 21, 1733-1742 (2014) doi:10.1016/j.chembiol.2014.10.018 Selective Packaging of Ferricyanide within Thermoresponsive Microgels O. Mergel, A.P.H. Gelissen, P. Wünnemann, A. Böker, U. Simon, F.A. Plamper J. Phys. Chem. C, 118, 26199-26211 (2014) doi:10.1021/jp508711k Morphology-Controlled Kinetics of Solvent Uptake by Block Copolymer Films in Nonselective Solvent Vapors A. Stenbock-Fermor, A.A. Rudov, R.A. Gumerov, L.A. Tsarkova, A. Böker, M. Möller, I.I. Potemkin ACS Macro Lett., 3, 803-807 (2014). doi:10.1021/mz500347n Ultra-Thin Self-Assembled Protein-Polymer Membranes: A New Pore Forming Strategy P. van Rijn, M. Tutus, C. Kathrein, N.C. Mougin, H. Park, C. Hein, M.P. Schürings, A. Böker Adv. Funct. Mater., 24, 6762-6770 (2014). doi:10.1002/adfm.201401825 Enhancing Ordering Dynamics in Solvent-Annealed Block Copolymer Films by Lithographic Hard Mask Supports A. Stenbock-Fermor, A.W. Knoll, A. Böker, L. Tsarkova Macromolecules, 47, 3059–3067 (2014). doi:10.1021/ma500561q Quantification of Encapsulated Bioburden in Spacecraft Polymer Materials by Cultivation-Dependent and Molecular Methods A. Bauermeister, A. Mahnert, A. Auerbach, A. Böker, N. Flier, C. Weber, A.J. Probst, C. Moissl-Eichinger, K. Haberer PLoS ONE, 9, e94265 (2014). doi:10.1371/journal.pone.0094265 Designing Zwitterionic SiO2NH2-Au Particles with Tunable Patchiness using Wrinkles R. Brüx, S. Hiltl, V. Schröder, C. von Essen, A. Böker Part. Part. Syst. Charact., 31, 871-878 (2014).