01.12.15

17.15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle

Dr. Michael Sommer

Uni Freiburg, Institut für Makromolekulare Chemie

“Conjugated and responsive polymers: defect structures, new syntheses and high performance materials”

Abstract:
My group focuses on the development of new materials for use in opto-electronic devices as well as for sensing applications. Suitable candidates of high performance conjugated polymers have been identified as active materials for a variety of thin film devices including photovoltaic cells, field-effect transistors, light emitting diodes, batteries or supercapacitors. A major challenge that has moved into focus is the quest for simpler, greener and environmentally more benign synthesis routes while maintaining high performance, batch-to-batch reproducibility and control over molecular weight. In the first part of my talk, I will explore the scope and limitations of direct C-H activation polycondensation (DAP),...

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Sommer_PSM_01122015.pdf (125 KB)  vom 02.11.2015

24.11.15

17.15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle

Prof. Birgit Strodel

(Computational Biochemistry Group ICS-6: Structural Biochemistry, Forschungzentrum Jülich)

“Thermodynamics and kinetics of amyloid aggregation from atomistic simulations”

Abstract:
A major cause for cellular toxicity involved in the onset of several neurodegenerative diseases is the aberrant aggregation of proteins into oligomers and eventually fibrils. In the case of Alzheimer's disease, the main aggregating protein is the amyloid β-protein with two main alloforms of 40 (Aβ40) and 42 (Aβ42) amino acids. Numerous experimental studies have shown that...

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Strodel_PSM_24112015.pdf (161,1 KB)  vom 10.11.2015

17.11.15

17.15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle

Prof. Felix Schacher

Friedrich-Schiller-Universität Jena, Jena Center of Soft Matter

“Opportunities for Block Copolymers in Interface Design: Membranes and Hybrid Materials”

Abstract:
Block copolymers represent a unique class of building blocks for the generation of nanostructured materials in different environments – mainly driven by the inherent immiscibility of unlike segments. Our focus is put on materials which contain at least one segment which can be selectively addressed, either chemically (crosslinking, modification) or physically and how such materials can be used to "design" polymer-polymer interfaces in membrane materials or polymer-metal interfaces. In the latter case, especially core-shell hybrid materials are of interest, e.g. metal or metal oxide nanoparticles where suitable block copolymer ligands allow to control surface charge, charge density, or nature and amount of functional groups being present.

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Schacher_PSM_17112015.pdf (181,7 KB)  vom 24.08.2015

03.11.15

17.15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle

Dr. Arnold Boersma

University of Groningen, Netherlands

"Quantification and consequences of macromolecular crowding”

Abstract:
Cells are highly crowded with proteins and polynucleotides, with concentrations ranging from 80 to 400 mg/mL. Knowledge of crowding is critical to understand cell physiology and to assess its relevance for medical science and biotechnology: Any reaction that depends on the available volume can be affected by crowding, which includes diffusion, conformation, association, folding, phase separation, and aggregation of the biopolymers....

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Boersma_PSM_03112015.pdf (119,3 KB)  vom 27.10.2015

27.10.15

17.15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle

Dr. Ilja Gunkel

Soft Matter Physics Group, Adolphe Merkle Institute, Fribourg Switzerland

“In situ grazing-incidence small-angle X-ray scattering studies of block copolymer films during solvent vapor annealing”

Abstract:
The self-assembly of block copolymers is a powerful approach toward the fabrication of templates and scaffolds for nanostructured morphologies. Block copolymers in thin films are useful, for example, for the generation of masks for lithography applications....

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Gunkel_PSM_27102015.pdf (90,6 KB)  vom 16.10.2015

20.10.15

17.15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle

Prof. Dr. Jörg Tiller

TU Dortmund, Lehrstuhl für  Biomaterialien und Polymerwissenschaften

“Shape Memory Natural Rubber (SMNR) - A Smart Material”

Abstract:
Lowly cross-linked natural rubber forms crystals upon strain that are stable at room temperature and thus stabilize the stretched state until heat in the region of body temperature is applied. Thus,  SMNR is so far the only cold programmable shape memory polymer. Since the crystals and the amorphous state can be altered in the stretched form, programmed SMNR is additionally reacting to environmental signals such as various chemical vapors, sensing and memorizing them, and reacting to those.

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Tiller_PSM_20102015.pdf (89,9 KB)  vom 24.08.2015

02.06.15

17.15 Uhr im Seminarraum 1.27 Von-Danckelmann-Platz 4, 06120 Halle

Prof. Ulrich H. E. Hansmann

Department of Chemistry and Biochemistry, University of Oklahoma,  USA

“Simulation of Folding and Aggregation of Proteins”

Abstract:

A detailed knowledge of the processes by that proteins fold, self-assemble or aggregate is crucial for an understanding of disease pathways and the working of drugs at the level of cells. As these fundamental processes are difficult to trace in experiments, there is a need for reliable computational tools that complement experiments in studying folding and aggregation of proteins.
In this talk, I will describe some of the methods and techniques…

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Hansmann_PSM_02062015.pdf (208,9 KB)  vom 01.06.2015

Sondertermin 06.02.15

9.15 Uhr im Seminarraum 1.27 Von-Seckendorff-Platz 1, 06120 Halle

Dr. Dr. Clemens Liedel

Cornell University, Department of Materials Science and Engineering, Ithaca,  USA

"Influences on the Structure Formation in Elec-tro-Responsive and Redox-Active Polymers"

Abstract:
While block copolymers can self-assemble into ordered structures with dimensions of up to a few micrometers, grains with different orientation prevent macroscopic ordering. Larger patterns are only accessible using external directing forces, for example patterned surfaces or electric fields. Additives like solvents or nanoparticles further influence the kinetics of structure formation and the kind and order of the formed morphologies….

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Liedel_PSM_06022015.pdf (210,5 KB)  vom 29.01.2015