Publications
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Recent Publications
Claas-Hendrik Stamp, Binyam Solomon, Friederike Lang, Efstathios Mitropoulos and Thomas Pfohl.
Lab Chip 23 (2023) 3662-3670
Controlling fluid flow in microfluidic devices and adapting it to varying conditions by selectively regulating hydrodynamic properties is of critical importance, as the field of microfluidics faces increasingly complex challenges in its wide range of applications. One way to manipulate flows in microfluidic devices is to introduce elastic elements that can be actively or passively deformed. In this work, we developed a membrane-based microfluidic device that allows us to study the deformation of swollen thin membranes as a function of the volume fractions in binary mixtures – here isopropanol and water. (more...)
Valentina Pirela, Justine Elgoyhen, Radmila Tomovska, Jaime Martin Perez, Cuong Minh Quoc Le, Abraham Chemtob, Brahim Bessif, Barbara Heck, Günter Reiter, and Alejandro Müller. ACS Appl. Polym. Mater. 5 (2023) 5260–5269
A complex crystallization behavior was observed for the alternating copolymer DMDS-alt-DVE synthesized via thiol–ene step-growth polymerization. Understanding the underlying complex crystallization processes of such innovative polythioethers is critical for their application, for example, in polymer coating technologies. These alternating copolymers have polymorphic traits, resulting in different phases that may display distinct crystalline structures. The copolymer DMDS-alt-DVE was studied in an earlier work, where only two crystalline phases were reported: a low melting, L – Tm, and high melting, H – Tm phase. Remarkably, the H – Tm form was only achieved by the previous formation and melting of the L – Tm form. We applied calorimetric techniques encompassing seven orders of magnitude in scanning rates to further explore this complex polymorphic behavior. (more...)
Transparent, thermoplastic, aliphatic polyesters through crystallization under molecular confinement
Maziar Matloubi, Melika Sarem, Barbara Heck, Günter Reiter, and V. Prasad Shastri. Matter 6 (2023) 3057-3074
In semi-crystalline biodegradable polymers, uncontrolled evolution of crystallinity impacts processing and bulk properties, limiting their application. Through molecular confinement of low-molecular-weight poly(L-lactic acid) (PLLA) segments by polysiloxane blocks and processing at far-from-equilibrium conditions, PLLA crystallization into lamellae of a few nm in thickness with coherence lengths below 100 nm was achieved, thus giving access to films that are optically transparent for over 5 years, possess high Young’s modulus and elongation at break, undergo controlled degradation, and support functional endothelialization. The films possess a nanophase segregated bulk morphology with a hydrophobic siloxane-dominated surface that can be pressure bonded following cold oxygen plasma activation and low-temperature glassy PLLA domains interspersed by nanoscale crystalline physical crosslinks that enable glass transition temperature-triggered shape change. The segmented thermoplastic polyesters (STEPs) can additionally be processed using melt-extrusion printing into 3D objects, thus opening potential application opportunities in the fabrication of implantable/degradable electronics, smart textiles, and packaging. (more...)
List of Publications
- Manipulating the dewetting dynamics of polymer films by creating non-equilibrium conformational states at the interface
- Adrian Linn, Master Thesis 2017
- Induziertes gerichtetes Kristallwachstum einer kristallisierbaren Polymerkomponente innerhalb eines nicht-kristallisierbaren Polymernetzwerks und Untersuchung der resultierenden mechanischen Energie
- Stephan Laule. Inauguraldissertation 2017
- Self-Assembly and Polymerization of Diacetylene Molecules on Epitaxial Graphene
- Fallou Fall, Inaugural-Dissertation zur Erlangung des Doktorgrads der Fakultät für Mathematik und Physik der Universität Freiburg, 2017
- Vesicle Origami and the Influence of Cholesterol on Lipid Packing
- Radu Tanasescu, Martin A. Lanz, Dennis Mueller, Stephanie Tassler, Takashi Ishikawa, Renate Reiter, Gerald Brezesinski, and Andreas Zumbuehl. Langmuir 32 (2016) 4896−4903
- Self-assembly behavior of a rod-like polypeptide at the air-water interface
- Renate Reiter, Frédéric Wintzenrieth, Günter Reiter. Polymer 107 (2016) 379–386
- Covalent Functionalization by Cycloaddition Reactions of Pristine Defect-Free Graphene
- L. Daukiya, C. Mattioli, D. Aubel, S. Hajjar-Garreau, F. Vonau, E.Denys, G. Reiter, J. Fransson, E. Perrin, M-L. Bocquet, C. Bena, A. Gourdon, and L. Simon. ACS Nano 11 (2017) 627–634
- How Molecules with Dipole Moments Enhance the Selectivity of Electrodes in Organic Solar Cells – A Combined Experimental and Theoretical Approach
- Uli Würfel, Martin Seßler, Moritz Unmüssig, Nils Hofmann, Mathias List, Eric Mankel, Thomas Mayer, Günter Reiter, Jean-Luc Bubendorff, Laurent Simon, and Markus Kohlstädt. Adv. Energy Mat. 1600594 (2016)
- Flow-Induced Dendritic β-Form Isotactic Polypropylene Crystals in Thin Films
- Bin Zhang, Binghua Wang, JiaJia Chen, Changyu Shen, Renate Reiter, Jingbo Chen, and Günter Reiter. Macromolecules 49 (2016) 5145−5151
- Assembling semiconducting molecules by covalent attachment to a lamellar crystalline polymer substrate
- Rainhard Machatschek, Patrick Ortmann, Renate Reiter, Stefan Mecking and Günter Reiter. Beilstein J. Nanotechnol. 7 (2016) 784–798
- When hole extraction determines charge transfer across metal-organic-metal structure
- L. V. Govor, G. Reiter and J. Parisi, EPL, 113 (2016) 57002
- Influence of interfacial trap states on injecting and extracting of charges across a metal-organic interface
- L.V. Govor, G. Reiter and J. Parisi. J. Phys. D: Appl. Phys. 49 (2016) 135306
- Continuous Fused Deposition Modelling of Architectural Envelopes Based on the Shell Formation of Molluscs: A Research Review
- James H. Nebelsick, Christoph Allgaier, Benjamin Felbrich, Daniel Coupek, Renate Reiter, Günter Reiter, Achim Menges, Armin Lechler, Karl-Heinz Wurst. In book: Biomimetic Research for Architecture and Building Construction. Eds. Jan Knippers, Klaus Nickel, Thomas Speck. Springer 2016
- Tunneling of charge carriers across a gold–squaraine interface
- L.V. Govor, G. Reiter and J. Parisi, Physics Letters A 380 (2016) 1493–1498
- Intrinsic Stresses in Thin Glassy Polymer Films Revealed by Crack Formation
- Mithun Chowdhury, Xiaoyuan Sheng, Falko Ziebert, Arnold C.-M. Yang, Alessandro Sepe, Ullrich Steiner, and Günter Reiter. Macromolecules 49 (2016) 9060−9067
- Revealing Order and Disorder in Films and Single Crystals of a Thiophene-Based Oligomer by Optical Spectroscopy
- Sajedeh Motamen, Dominic Raithel, Richard Hildner, Khosrow Rahimi, Thibaut Jarrosson, Françoise Serein-Spirau, Laurent Simon, and Günter Reiter. ACS Photonics 3 (2016) 2315–2323
- Poly(2,5-dioctylphenyl-3-thiophene) synthesized by direct arylation polycondensation: End groups, defects and crystallinity
- Daniel Schiefer, Hartmut Komber, Fanuel Mugwanga Keheze, Susanna Kunz, Ralf Hanselmann, Guenter Reiter, Michael Sommer. Macromolecules 49 (2016) 7230-7237
- Transient cooperative processes in dewetting polymer melts
- Sivasurender Chandran, Günter Reiter, PRL 116 (2016) 088301
- Crystallization and Resulting Optical Properties of Thiophene-Based Oligomers
- Sajedeh Motamen. Inaugural-Dissertation zur Erlangung des Doktorgrads der Fakultät für Mathematik und Physik der Universität Freiburg, 2016
- Large area crystal surfaces of precisely sidebranched polyethylenes: Preparation, surface order and functionalization
- Rainhard Machatschek. Inaugural-Dissertation zur Erlangung des Doktorgrades der Fakultät für Chemie und Pharmazie der Albert-Ludwigs-Universität Freiburg im Breisgau, 2016
- Probing the Elasticity of Langmuir Polymer Films of High Molecular Weight Poly (γ-benzyl-L-glutamate)
- Emna Khechine. Master Thesis im Studiengang M.Sc. Sustainable Materials, 2016