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Neueste Veröffentlichungen
Da Huang, Thorsten Hugel, and Günter Reiter. Macromolecules, published online
We have investigated the formation of millimeter-long filaments induced by spin-coating ca. 130 °C dilute para-xylene solutions of rapidly crystallizable polyethylene chains with a contour length in the micrometer range onto ca. 80 °C mica substrates. These filaments were radially oriented and accumulated on the periphery of the substrate. Our observations can be explained by the stretching of polymers through the flow field induced by spinning the solution on a solid substrate. The corresponding loss in conformational entropy emphasized attractive interactions between polymers, which resulted in the formation of bundles and their assembly into long filaments. Caused by a Plateau–Rayleigh-type instability of a liquid coating on a solid filament and due to crystallization, these filaments were decorated with various small-scale structures. (more...)
Mina Alizadehaghdam, Farhang Abbasi, Günter Reiter. J. Phys. Chem. C 128 (2024) 4757–4765
Crystallization of poly(3-hexylthiophene) (P3HT) was studied in mixtures of different concentrations of 3-hexylthiophene (3HT) as a diluent. Two coexisting crystal populations, socalled “thin” and “thick” crystals, with melting temperatures differing by more than 10 °C were observed in these mixtures. Intriguingly, the “thick” crystals represented transient unstable structures, with a mass fraction that was the highest ФH for rapidly crystallized P3HT in presence of significant amount of diluent. Reflecting its dependence on growth kinetics, ФH decreased with increasing crystallization temperature, extended crystallization time or lower cooling rate. The presence of a diluent led to a “depression” of the melting temperature, described by Raoult’s law and the Flory equation, which was similar for P3HT samples crystallized in various ways. (more...)
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...)
Liste der Veröffentlichungen
- Pneumatically Controlled Nanofluidic Devices for Contact-Free Trapping and Manipulation of Nanoparticles
- Michael Adrian Gerspach, Nassir Mojarad, Deepika Sharma, Yasin Ekinci,and Thomas Pfohl. Part. Part. Syst. Charact. 2018, 1800161
- Monitoring single-cell gene regulation under dynamically controllable conditions with integrated microfluidics and software
- M. Kaiser, F. Jug, T. Julou, S. Deshpande, T. Pfohl, O. K. Silander, G. Myers, E. van Nimwegen, Nature Communications 9, 212 (2018)
- Growth Kinetics of Stacks of Lamellar Crystals in Polymer Thin Films
- Sumit Majumder. Inauguraldissertation 2018
- Optical studies on indicators of order and disorder in films and crytals of a bulky substituted polythiophene
- Fanuel Mugwanga Keheze. Inauguraldissertation 2018
- Multiple structural transitions in Langmuir monolayers of charged soft-shell nanoparticles
- Ahmed El-Tawargy, David Stock, Markus Gallei, Wael Ramadan, Mamdoh Shams El-Din, Günter Reiter, Renate Reiter. Langmuir 34, 3909−3917 (2018)
- Thermodynamic origin of multi-layer structures in Langmuir polymer films
- Volker Knecht, Günter Reiter, Renate Reiter. Langmuir 33 (2017) 11399–11405
- Structure Formation in Langmuir Peptide Films As Revealed from Coarse-Grained Molecular Dynamics Simulations
- Volker Knecht, Günter Reiter, Helmut Schlaad, and Renate Reiter. Langmuir 33 (2017) 6492-6502
- Schnecken als lebende 3D-Drucker: freie Formen für die Architektur von morgen
- Christoph Allgaier, Benjamin Felbrich, Frederik Wulle, Emna Khechine, James H. Nebelsick, Achim Menges, Günter Reiter, Renate Reiter, Armin Lechler, Alexander Verl, Karl-Heinz Wurst. Baubionik – Biologie beflügelt Architektur, Publisher: Naturkundemuseum Stuttgart 2017
- Signatures of Melting and Recrystallization of a Bulky Substituted Poly(thiophene) Identified by Optical Spectroscopy
- Fanuel Keheze, Dominic Raithel, Tianyu Wu, Daniel Schiefer, Michael Sommer, Richard Hildner, Günter Reiter. Macromolecules 50 (2017) 6829–6839
- Triple-Shape Memory Materials via Thermoresponsive Behavior of Nanocrystalline Non-Isocyanate Polyhydroxyurethanes
- Vitalij Schimpf, Barbara Heck, Günter Reiter, Rolf Mülhaupt. Macromolecules 50 (2017) 3598–3606
- Semicrystalline long-chain polyphosphoesters from polyesterification
- Hanna Busch, Sumit Majumder, Guenter Reiter, Stefan Mecking. Macromolecules 50 (2017) 2706–2713
- Blocking of injected holes at the charge extracting interface
- L. Govor, G. Reiter, J. Parisi. Journal of Physics, Condensed Matter 29 (2017) 025001
- Relaxing Non-equilibrated Polymers in Thin Films at Temperatures Slightly Above the Glass Transition
- Mithun Chowdhury, Samer Al Akhrass, Falko Ziebert, Günter Reiter. Journal of Polymer Science Part B: Polymer Physics 55 (2017) 515–523
- Solvent-controlled reversible switching between adsorbed self-assembled nanoribbons and nanotubes
- Asad Jamal, Irina Nyrkova, Philippe Mesini, Swann Militzer and Günter Reiter. Nanoscale 9 (2017) 3293-3303
- Low Loss Optical Waveguiding in Large Single Crystals of Thiophene-Based Oligomers
- Sajedeh Motamen, Christian Schörner, Dominic Raithel, Jean-Pierre Malval, Thibaut Jarrosson, Françoise Serein-Spirau, Laurent Simon, Richard Hildner, Günter Reiter. Physical Chemistry Chemical Physics 19 (2017) 15980 - 15987
- Time Allowed for Equilibration Quantifies the Preparation Induced Non-equilibrium Behavior of Polymer Films
- Sivasurender Chandran, Rishab Handa, Marwa Kchaou, Samer Al Akhrass, Alexander Semenov, Günter Reiter. ACS Macro Lett. 6 (2017) 1296-1300
- A novel interferometric method for the study of the viscoelastic properties of ultra-thin polymer films determined from nanobubble inflation
- P. Chapuis , P. C. Montgomery, F. Anstotz, A. Leong-Hoï, C. Gauthier, J. Baschnagel, G. Reiter, G. B. McKenna, and A. Rubin. Review of Scientific Instruments 88 (2017) 093901
- Controlling Polymer Crystallization Kinetics by Sample History
- Purushottam Poudel, Sivasurender Chandran, Sumit Majumder and Günter Reiter. Macromol. Chem. Phys. 2017, 1700315
- Morphological Changes of Isotactic Polypropylene Crystals Grown in Thin Films
- Bin Zhang, Jiajia Chen, Baochen Liu, Binghua Wang, Changyu Shen, Renate Reiter, Jingbo Chen, Günter Reiter. Macromolecules 50 (2017) 6210−6217
- Soft electrostatic trapping in nanofluidics
- Michael A. Gerspach, Nassir Mojarad, Deepika Sharma, Thomas Pfohl, and Yasin Ekinci. Microsystems & Nanoengineering (2017) 3, 17051