Sie sind hier: Startseite Veröffentlichungen



Nach Erscheinungsjahr...

2016-2018 2019-2021 2022-2023 2024
2004-2006 2007-2009 2010-2012 2013-2015
bis 1990 1991-1995 1996-2000


... oder nutzen Sie die

ausführliche Suchfunktion 


Neueste Veröffentlichungen

Mechanism for the Formation of Millimeter-Long Solid Filaments by Spin Coating Dilute Solutions of a Crystallizable Polymer

Da Huang, Thorsten Hugel, and Günter Reiter. Macromolecules, published online

huang.jpgWe 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...)

Competing influences of cooling rate and diluent concentration on crystallization of poly(3-hexylthiophene)

Mina Alizadehaghdam, Farhang Abbasi, Günter Reiter. J. Phys. Chem. C 128 (2024) 4757–4765

mina.jpgCrystallization 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...)

Tuning the hydraulic resistance by swelling-induced buckling of membranes in high-aspect-ratio microfluidic devices

Claas-Hendrik Stamp, Binyam Solomon, Friederike Lang, Efstathios Mitropoulos and Thomas Pfohl.
Lab Chip 23 (2023) 3662-3670

stamp.jpgControlling 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

Molecular-Dynamics in Perfluoro-n-Eicosane. 3. Oscillatory and Diffusive Translational Motion
T. Albrecht, R. Jäger, W. Petry, R. Steiner, G. Strobl, B. Stühn. Journal of Chemical Physics 95, 2817-2822 (1991)
Molecular-Dynamics in Perfluoro-n-Eicosane. 2. Components of Disorder
T. Albrecht, H. Elben, R. Jäger, M. Kimmig, R. Steiner, G. Strobl, B. Stühn, H. Schwickert, C. Ritter. Journal of Chemical Physics 95, 2807-2816 (1991)
Molecular-Dynamics in Perfluoro-n-Eicosane. 1. Solid-Phase Behavior and Crystal-Structures
H. Schwickert, G. Strobl, M. Kimmig. Journal of Chemical Physics 95, 2800-2806 (1991)
Mesogenic 4-Methoxyphenyl 4-Hexyloxybenzoate
W. Haase, H. Paulus, G. Strobl, W. Hotz. Acta Crystallographica C, Crystal Structure Communications 47, 2005-2006 (1991)
Ellipsometric characterisation of Langmuir monolayer of “hairy-rod” polymeres at the air-water interface
H. Motschmann, R. Reiter, R. Lawall, G. Duda, M. Stamm, G. Wegner, W. Knoll. Langmuir 7, 2743-2747 (1991)
Comparative Study of Individual and Collective Rotational Motion in Mixtures of Liquid Crystalline Side Group Polymers and Low Molecular Weight Mesogens
H. Seiberle, W. Stille and G. Strobl. Macromolecules 23, 2008 (1990)
Interdiffusion of Polymer Thin Films as Determined by Scattering Techniques
M. Stamm, D. Brautmeier, G. Reiter, M. Foster. Proceed. of the 48th ANTEC 1990 Dallas, USA on "Plastics in the Environment: Yesterday, Today and Tomorrow" 36, 825 (1990)
Characterisation of Polymer Surfaces and Interfaces by Reflectivity and Interference Techniques
M. Stamm, G. Reiter, M. Foster, H. Motschmann, S.Hüttenbach, C. Toprakcioglu. Sci. and Eng., ACS/PMSE 62, 843 (1990)
Interfacial Mixing of Polymers as Investigated by X-ray and Neutron Reflectometry
M. Stamm, G. Reiter, S. Hüttenbach, M. Foster. ACS Polymer preprints 31, 73 (1990)
X-ray Reflectometer for Study of Polymer Thin Films and Interfaces
M. Foster, M. Stamm, G. Reiter, S. Hüttenbach. Vacuum, 41, 1441-1444 (1990)
Positron Lifetime Investigations on Linear Polyethylene Compared to Branched Polyethylene
G. Reiter, P. Kindl. phys. stat. sol. (a) 118, 161-168 (1990)
Concentration-Dependence of the Flory-Huggins Interaction Parameter of a Polymer Blend as Determined by Small-Angle X-Ray-Scattering Experiments
T. Koch, G.R. Strobl. Journal of Polymer Science B - Polymer Physics 28, 343-353 (1990)
Positron Lifetime Investigations on Polymethylmethacrylate
P. Kindl, G. Reiter. In: Positron Annihilation, Ed. L. Dorikens-Vanpraet, M. Dorikens, and D. Segers, World Scientific, Singapore 1989 (p.806)
A Neutron Reflectometer for the Investigation of Solid and Liquid Interfaces
M. Stamm, G. Reiter, S. Hüttenbach. Physica B 156, 564-566 (1989)
Kinetics of Relaxation and Unmixing in Polymer Blends as Studied by X-Ray-Scattering
G. Strobl. Makromolekulare Chemie - Macromolecular Symposia 26, 413-429 (1989)
X-Ray-Scattering Study of Molecular Order in a Liquid Crystal-Side Group Polysiloxane
W. Hotz, G. Strobl. Colloid and Polymer Science 267, 889-898 (1989)
Interdiffusion in the Partially Miscible Polymer Blend of Deuterated Polystyrene and Poly(styrene-co-bromostyrene)
F. Bruder, R. Brenn, B. Stühn, G.R. Strobl. Macromolecules 22, 4434-4437 (1989)
Structure Relaxation after Temperature Jumps in Homogeneous Polystyrene Poly(styrene-co-bromostyrene) Blends
G.R. Strobl, G. Urban. Colloid and Polymer Science 266, 398-404 (1988)
Soliton dynamics and impurities in the Pariser-Parr-Pople model of alternating trans-polyacetylen
R. Markus, W. Förner, J. Ladik. Solid States Communications 68, 135-138 (1988)
Investigations on Low Temperature Transitions and Time Effects of Branched Polyethylene by the Positron Lifetime Technique
P. Kindl, G. Reiter. phys. stat. sol. (a) 104, 707 (1987)
Benutzerspezifische Werkzeuge