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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
- Investigation of polymer crystallization kinetics with time dependent light attenuation measurements
- J. Fritsch, W. Stille, G. Strobl. Colloid Polym. Sci. 284, 620 (2006)
- Viscoelastic dewetting of constrained polymer thin films
- Pascal Damman, Séverine Sclavons, Sylvain Gabriele, Sylvain Desprez, Günter Reiter, Moustafa Hamieh, Samer Al Akhrass, Thomas Vilmin, Elie Raphaël. Journal of Polymer Science Part B: Polymer Physics 44, 3022-3030 (2006)
- Lamellar Crystal Orientations Biased by Crystallization Kinetics in Polymer Thin Films
- Yu Ma, Wenbing Hu, Günter Reiter. Macromolecules 39, 5159-5164 (2006)
- Disentanglement Time of Polymers Determines the Onset of Rim Instabilities in Dewetting
- Sylvain Gabriele, Séverine Sclavons, Günter Reiter, Pascal Damman. Phys. Rev. Lett. 96, 156105 (2006)
- The Formation of Ordered Polymer Structures at Interfaces
- J.-U. Sommer and G. Reiter Advances in Polymer Science, 200, 1-36 (2006)
- Elastomer polymer brushes on flat surface by bimolecular surface-initiated nitroxide mediated polymerization
- Julien Parvole, Jean-Pierre Montfort, Günter Reiter, Oleg Borisov, Laurent Billon. Polymer, 47, 972-981 (2006)
- The role of nonlinear friction in the dewetting of thin polymer films
- T. Vilmin, E. Raphaël, P. Damman, S. Sclavons, S. Gabriele, M. Hamieh, G. Reiter. Europhys. Lett. 73, 906 - 912 (2006)
- Self-Assembly of Nanoparticle Ring Patterns
- Jürgen Parisi, Leonid V. Govor, Gottfried H. Bauer, Günter Reiter. Zeitschrift für Naturforschung Section A, A journal of physical sciences 61, 99-102 (2006)
- Bilayer formation in thin film of a binary solution
- Leonid V. Govor, Günter Reiter, Gottfried H. Bauer, Jürgen Parisi. Physics Letters A 353, 198–204 (2006)
- Ordered Polymeric Nanostructures at Surfaces
- Editors: G. Julius Vancso and Günter Reiter. Advances in Polymer Science 200 (2006), Springer Berlin/Heidelberg, ISBN: 3-540-31921-2, DOI: 10.1007/11605294, ISSN: 0065-3195 (Paper) 1436-5030 (Online)
- Amorphous Thin Polymers Films: Consequences of Residual Stresses
- G. Reiter, M. Hamieh, S. Al Akhrass, S. Sclavons, S. Gabriele, P. Damman, T. Vilmin, E. Raphaël. Makromolekulares Kolloquium Freiburg, “Macromolecular Bioscience”. 6 (2), F95 (2006)
- Treelike branched structures formed in dewetting thin films of a binary solution
- Leonid V. Govor, Günter Reiter, Gottfried H. Bauer, Jürgen Parisi. Appl. Phys. Lett. 89, 133126 (2006)
- Self-assembled tree-like patterns from an evaporating binary solution
- Leonid V. Govor, Günter Reiter, Gottfried H. Bauer, Jürgen Parisi. Phys. Rev. E 74, 061603 (2006)
- Crystallization of block copolymers in restricted cylindrical geometries
- Cvetelin Vasilev, Günter Reiter, Stergios Pispas, Nikos Hadjichristidis Polymer, 47, 330-340 (2006)
- Network stretching during tensile drawing of polyethylene: A study using X-ray scattering and microscopy
- Ke Hong, Gert Strobl. Macromulecules 39, 268-273 (2006)
- Temperature dependent variations in the lamellar structure of poly(L-lactide)
- Tai-Yon Cho, Gert Strobl. Polymer 47, 1036-1043 (2006)
- Viscous-force-dominated tensile deformation behavior of oriented polyethylene
- B. Na, Q. Zhang, Q. Fu, Y.F. Men, K. Hong, G. Strobl. Macromolecules 39, 2584-2591 (2006)
- Low-field NMR studies of polymer crystallization kinetics: changes in the melt dynamics
- C. Hertlein, K.Saalwächter, G. Strobl. Polymer 47, 7216 (2006)
- Crystallization and Melting of Bulk Polymers: New Observations, Conclusions and a Thermodynamic Scheme
- Gert Strobl. Prog. Polym. Sci. 31, 398 (2006)
- Time dependent light attenuation measurements used in studies of the kinetics of polymer crystallization
- Barbara Heck, Takahiko Kawai, Gert Strobl. Polymer 47, 5538-5543 (2006)