Sie sind hier: Startseite Veröffentlichungen
Artikelaktionen

Veröffentlichungen

bibliothek-720x.jpgwx121.jpg

Nach Erscheinungsjahr...

2016-2018 2019-2021 2022-2023 2024
2004-2006 2007-2009 2010-2012 2013-2015
bis 1990 1991-1995 1996-2000
2001-2003

       

... oder nutzen Sie die

ausführliche Suchfunktion 

 

Neueste Veröffentlichungen


Mechanistically Different Mechanochromophores Enable Calibration and Validation of Molecular Forces in Glassy Polymers and Elastomeric Networks

Raphael Hertel, Maximilian Raisch, Michael Walter, Günter Reiter, Michael Sommer. Angew. Chem. Int. Ed. 2024, e202409369

sommer.jpgSterically distorted donor-acceptor p‑systems, termed DA springs, can be progressively planarized under mechanical load causing a bathochromic shift of the photoluminescence (PL) spectrum. By combining theory and experiment, we here use a simple linear force calibration for two different conformational mechanochromophores to determine molecular forces in polymers from the mechanochromic shift in PL wavelength during multiple uniaxial tensile tests. Two systems are used, i) a highly entangled linear glassy polyphenylene and ii) a covalent elastomeric polydimethylsiloxane network. The mean forces estimated by this method are validated using known threshold forces for the mechanochemical ring-opening reactions of two different spiropyran force probes. The agreement between both approaches underlines that these DA springs provide the unique opportunity for the online monitoring of local molecular forces present in diverse polymer matrices.(more...)



"Printing" on Polymer Single Crystals through Microregional Heating

Tianyu Wu, Haimu Ye, Xinyi Pan, Yaning He, Jun Xu, Günter Reiter. ACS Appl. Polym. Mater. 2024, 6, 14, 7969–7977

tianyu.jpgPolymer single crystals are composed of well-ordered polymer chains and possess a characteristic symmetric shape. If one can precisely control the microregional morphology, polymer single crystals have the potential to be used as functional templates for applications like information storage or cell culture. However, with current experimental approaches, it is rather difficult to generate predictable structures of defined size within polymer single crystals. Here, we propose a research strategy based on a combination of fluorescence labeling and microregional heating by irradiation with focused red light. This approach enabled us to locally heat single crystals while simultaneously following the thereby induced changes via fluorescence imaging with a micrometer lateral resolution. We found that polymers diffused out of the heated region within a stacked single crystal and thereby produced a hole at the irradiated location. (more...)


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 2024, 57, 3696–3705

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...)


 

Liste der Veröffentlichungen

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
Live cell X-ray imaging of autophagic vacuoles formation and chromatin dynamics in fission yeast
N. Strelnikova, N. Sauter, M. Guizar-Sicairos, M. Göllner, A. Diaz, P. Delivani, M. Chacon, I. M. Tolić, V. Zaburdaev, T. Pfohl, Scientific Reports 7 (2017) 13775
Second messenger-mediated tactile response by a bacterial rotary motor
I. Hug, S. Deshpande, K. S. Sprecher, T. Pfohl, U. Jenal, Science 358 (2017) 531-534
Manipulating the dewetting dynamics of polymer films by creating non-equilibrium conformational states at the interface
Adrian Linn, Master Thesis 2017
Induziertes gerichtetes Kristallwachstum einer kristallisierbaren Polymerkomponente innerhalb eines nicht-kristallisierbaren Polymernetzwerks und Untersuchung der resultierenden mechanischen Energie
Stephan Laule. Inauguraldissertation 2017
Self-Assembly and Polymerization of Diacetylene Molecules on Epitaxial Graphene
Fallou Fall, Inaugural-Dissertation zur Erlangung des Doktorgrads der Fakultät für Mathematik und Physik der Universität Freiburg, 2017
Vesicle Origami and the Influence of Cholesterol on Lipid Packing
Radu Tanasescu, Martin A. Lanz, Dennis Mueller, Stephanie Tassler, Takashi Ishikawa, Renate Reiter, Gerald Brezesinski, and Andreas Zumbuehl. Langmuir 32 (2016) 4896−4903
Self-assembly behavior of a rod-like polypeptide at the air-water interface
Renate Reiter, Frédéric Wintzenrieth, Günter Reiter. Polymer 107 (2016) 379–386
Covalent Functionalization by Cycloaddition Reactions of Pristine Defect-Free Graphene
L. Daukiya, C. Mattioli, D. Aubel, S. Hajjar-Garreau, F. Vonau, E.Denys, G. Reiter, J. Fransson, E. Perrin, M-L. Bocquet, C. Bena, A. Gourdon, and L. Simon. ACS Nano 11 (2017) 627–634
How Molecules with Dipole Moments Enhance the Selectivity of Electrodes in Organic Solar Cells – A Combined Experimental and Theoretical Approach
Uli Würfel, Martin Seßler, Moritz Unmüssig, Nils Hofmann, Mathias List, Eric Mankel, Thomas Mayer, Günter Reiter, Jean-Luc Bubendorff, Laurent Simon, and Markus Kohlstädt. Adv. Energy Mat. 1600594 (2016)
Flow-Induced Dendritic β-Form Isotactic Polypropylene Crystals in Thin Films
Bin Zhang, Binghua Wang, JiaJia Chen, Changyu Shen, Renate Reiter, Jingbo Chen, and Günter Reiter. Macromolecules 49 (2016) 5145−5151
Assembling semiconducting molecules by covalent attachment to a lamellar crystalline polymer substrate
Rainhard Machatschek, Patrick Ortmann, Renate Reiter, Stefan Mecking and Günter Reiter. Beilstein J. Nanotechnol. 7 (2016) 784–798
When hole extraction determines charge transfer across metal-organic-metal structure
L. V. Govor, G. Reiter and J. Parisi, EPL, 113 (2016) 57002
Influence of interfacial trap states on injecting and extracting of charges across a metal-organic interface
L.V. Govor, G. Reiter and J. Parisi. J. Phys. D: Appl. Phys. 49 (2016) 135306
Continuous Fused Deposition Modelling of Architectural Envelopes Based on the Shell Formation of Molluscs: A Research Review
James H. Nebelsick, Christoph Allgaier, Benjamin Felbrich, Daniel Coupek, Renate Reiter, Günter Reiter, Achim Menges, Armin Lechler, Karl-Heinz Wurst. In book: Biomimetic Research for Architecture and Building Construction. Eds. Jan Knippers, Klaus Nickel, Thomas Speck. Springer 2016
Tunneling of charge carriers across a gold–squaraine interface
L.V. Govor, G. Reiter and J. Parisi, Physics Letters A 380 (2016) 1493–1498
Intrinsic Stresses in Thin Glassy Polymer Films Revealed by Crack Formation
Mithun Chowdhury, Xiaoyuan Sheng, Falko Ziebert, Arnold C.-M. Yang, Alessandro Sepe, Ullrich Steiner, and Günter Reiter. Macromolecules 49 (2016) 9060−9067
Revealing Order and Disorder in Films and Single Crystals of a Thiophene-Based Oligomer by Optical Spectroscopy
Sajedeh Motamen, Dominic Raithel, Richard Hildner, Khosrow Rahimi, Thibaut Jarrosson, Françoise Serein-Spirau, Laurent Simon, and Günter Reiter. ACS Photonics 3 (2016) 2315–2323
Poly(2,5-dioctylphenyl-3-thiophene) synthesized by direct arylation polycondensation: End groups, defects and crystallinity
Daniel Schiefer, Hartmut Komber, Fanuel Mugwanga Keheze, Susanna Kunz, Ralf Hanselmann, Guenter Reiter, Michael Sommer. Macromolecules 49 (2016) 7230-7237
Benutzerspezifische Werkzeuge