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
- Dewetting-Induced Alignment and Ordering of Cylindrical Mesophases in Thin Block Copolymer Films
- Heng Zhang, Binghua Wang, Gang Wang, Changyu Shen, Jingbo Chen, Günter Reiter, Bin Zhang. Macromolecules 53, (2020) 9631–9640
- Estimation of the Size of Critical Secondary Nuclei of Melt-Grown Poly(l-lactide) Lamellar Crystals
- Shujing Zhang, Baohua Guo, Günter Reiter, Jun Xu. Macromolecules 53 (2020) 3482–3492
- Translating molecular relaxations in non-equilibrated polymer melts into lifting macroscopic loads
- Farzad Ramezani, Jörg Baschnagel, and Günter Reiter. Phys. Rev. Materials 4 (2020) 082601
- A new growth process for crystalline ultra-thin layers of conjugated oligomers used in field-effect transistor applications
- Sven Renkert, Sadiara Fall, Sajedeh Motamen, Thibaut Jarrosson, Françoise Serein-Spirau, Thomas Heiser, Laurent Simon, Günter Reiter, Jean-Luc Bubendorff. Applied Surface Science 539 (2021) 148024
- The memorizing capacity of polymers
- Günter Reiter. J. Chem. Phys. 152, 150901 (2020)
- Formation of asymmetric leaf-shaped crystals in ultrathin films of oriented polyethylene molecules resulting from high-temperature relaxation and recrystallization
- Huihui Li, Duanzijing Liu, Xinyun Bu, Zhenzhen Zhou, Zhongjie Ren, Xiaoli Sun, Renate Reiter, Shouke Yan, Günter Reiter. Macromolecules 53 (2020) 346-354
- Controlling phase transitions in Langmuir polymer films
- Abhijna Das. Inauguraldissertation der Fakultät für Mathematik und Physik 2020. DOI: 10.6094/UNIFR/167266
- Controlling Nucleation in Quasi-Two-Dimensional Langmuir Poly(L-lactide) Films through Variation of the Rate of Compression
- Abhijna Das, Ahmed S. El-Tawargy, Emna Khechine, Sebastian Noack, Helmut Schlaad, Günter Reiter, and Renate Reiter. Langmuir 35 (2019) 6129-6136
- Activity of the Gramicidin A Ion Channel in a Lipid Membrane with Switchable Physical Properties
- Renate Reiter, Ekaterina Zaitseva, Gerhard Baaken, Ibrahim Halimeh, Jan C. Behrends, Andreas Zumbuehl. Langmuir 35 (2019) 14959-14966
- Dewetting Rheology for Determining Viscoelastic Properties of Non-equilibrated Thin Polymer Films
- Austine A. Mulama, Sivasurender Chandran, Konstantinos Roumpos, Andrew O. Oduor, and Günter Reiter. Macromolecules 52 (2019) 7894-7903
- Relation between Charge Transport and the Number of Interconnected Lamellar Poly(3-hexylthiophene) Crystals
- Binghua Wang, Jingbo Chen, Changyu Shen, Günter Reiter, Bin Zhang. Macromolecules 52 (2019) 6088-6096
- Fully Isotactic Poly(p-methylstyrene): Precise Synthesis via Catalytic Polymerization and Crystallization Studies
- Tianyu Wu, Luis Valencia, Thomas Pfohl, Barbara Heck, Günter Reiter, Pierre Lutz, Rolf Mülhaupt. Macromolecules 52 (2019) 4839-4846
- Photoelectronic properties of composite films based on conductive polymer PIDT-BT and single-walled carbon nanotubes
- Andrey N. Aleshin, Baode Zhang, Petr A. Aleshin, Vasily N. Petrov, Irina N. Trapeznikova, Günter Reiter, Janis Kleperis. SN Applied Sciences 1 (2019) 1101
- Segmental Rearrangements Relax Stresses in Nonequilibrated Polymer Films
- Sivasurender Chandran, Günter Reiter. ACS Macro Letters, 8, 646, (2019)
- Thermodynamic Features of Perfectly Crystalline Poly(3-Hexylthiophene) Based on Flory’s Relation
- Mina Alizadehaghdam, Silvia Siegenführ, Farhang Abbasi, and Günter Reiter. Journal of Polymer Science Part B: Polymer Physics 57, 431–437 (2019)
- Thermodynamic Features of Perfectly Crystalline Poly(3-hexylthiophene) Revealed Through Studies of Imperfect Crystals
- Mina Alizadehaghdam, Barbara Heck, Silvia Siegenführ, Farhang Abbasi, and Günter Reiter. Macromolecules 52 (2019) 2487–2494
- A Structural Fibrillation Parameter from Small Angle X-ray Scattering to Quantify Pulp Refining
- Jia Mao, Barbara Heck, Hatem Abushammala, Günter Reiter, and Marie-Pierre Laborie. Cellulose 26 (2019) 4265–4277
- Following isothermal and non-isothermal crystallization of poly(3- hexylthiophene) thin films by UV-vis spectroscopy
- Mina Alizadehaghdam, Barbara Heck, Silvia Siegenführ, Yaser AlShetwi, Fanuel M. Keheze, Sebastian Stäter, Farhang Abbasia, Günter Reiter. Polymer 210 (2020) 122959
- Snails as living 3D printers: free forms for the architecture of tomorrow
- Christoph Allgaier, Benjamin Felbrich, Frederik Wulle, Emna Khechine, James H. Nebelsick, Achim Menges, Günter Reiter, Renate Reiter, Armin Lechler, Alexander Verl, Karl-Heinz Wurst. In Knippers, J; Schmid, U.; Speck, T. (eds.) Biomimetics for Architecture, Birkhäuser, Basel 2019, pp 126-133. (ISBN: 978-3-0356-1791-7)
- Controlling the Growth of Stacks of Correlated Lamellar Crystals of a Block Copolymer
- Sumit Majumder, Renate Reiter, Jun Xu and Günter Reiter. Macromolecules 52 (2019) 9665-9671