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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
- Morphological Phase Transitions in Spontaneous Dewetting of Thin Films on Homogeneous and Heterogeneous Surfaces
- A. Sharma, G. Reiter. Phase Transitions 75, 377-399 (2002)
- Pattern formation and ordering in thin films of crystallisable block copolymers
- Günter Reiter, Gilles Castelein, Jens-Uwe Sommer. Macromol. Symp. 183, 173–178 (2002)
- Some relevant parameters affecting the glass transition of supported ultra-thin polymer films
- Y. Grohens, L. Hamon, G. Reiter, A. Soldera, Y. Holl. Eur. Phys. J. E 8, 217-224 (2002)
- Are changes in morphology clear indicators for the glass transition in thin polymer films? Tentative ideas
- Günter Reiter. Eur. Phys. J. E 8, 251-255 (2002)
- The melting line, the crystallization line, and the equilibrium melting temperature of isotactic polystyrene
- M. Al-Hussein, G. Strobl. Macromolecules 35, 1672-1676 (2002)
- From crystalline block slips to dominance of network stretching - Mechanisms of tensile deformation in semi-crystalline polymers
- Yongfeng Men, Gert Strobl. Chinese Journal of Polymer Science 20, 161-170 (2002)
- Role and importance of radius of gyration of chains in the melt in the crystalization of poly(1-butene)
- Qiang Fu, Gert Strobl. Chinese Journal of Polymer Science 20, 143-154 (2002)
- Evidence for a mechanically active high temperature relaxation process in syndiotactic polypropylene
- Yongfeng Men, Gert Strobl. Polymer 43, 2761-2768 (2002)
- Strain-controlled tensile deformation behavior of isotactic poly(1-butene) and its ethylene copolymers
- M. Al-Hussein, G. Strobl. Macromolecules 35, 8515-8520 (2002)
- Change of modulus and yielding properties of syndiotactic polypropylene with the glass transition
- Y.F. Men, G. Strobl, P. Wette. E-Polymers, 040 (2002)
- Morphological basis for the complex melting behaviour of isotactic polystyrene
- M. Al-Hussein, G. Strobl. E-Polymers, 038 (2002)
- Physik kondensierter Materie. Kristalle, Flüssigkeiten, Flüssigkristalle und Polymere
- Gert Strobl. Springer 2002, ISBN 978-3540432173
- Negative cooperativity and aggregation in biphasic binding of Mastoporan X Peptide to membranes with acidic lipids
- G. Schwarz, R. Reiter. Biophysical Chemistry 90, 269-277 (2001)
- Call for papers Special issue on "Properties of thin polymer films"
- Günter Reiter (Editor) and James Forrest (Guest Editor) Eur. Phys. J. E 5, 389 (2001)
- Mission accomplished??
- A.M. Donald, J.-F. Joanny, M. Möller and G. Reiter (Editors-in-Chief). Eur. Phys. J. E 4, 3 (2001)
- Direct visualization of random crystallization and melting in arrays of nanometer-sized polymer crystals
- G. Reiter, G. Castelein, J.-U. Sommer, A. Röttele, T. Thurn-Albrecht. Phys. Rev. Lett. 87, 226101 (2001)
- Morphogenesis of lamellar polymer crystals
- J.-U. Sommer, G. Reiter. Europhys. Lett. 56, 755 (2001)
- Dewetting of highly elastic thin polymer films
- Günter Reiter. Phys. Rev. Lett. 87, 186101 (2001)
- Spincast, thin, glassy polymer films: highly metastable forms of matter
- G. Reiter, P. G. de Gennes. Eur. Phys. J. E 6, 25-28 (2001)
- Auto-optimization of dewetting rates by rim instabilities in slipping polymer films
- G. Reiter, A. Sharma. Phys. Rev. Lett. 87, 166103 (2001)