06.12.16

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

Dr. Tiago Ferreira

Martin-Luther-University Halle-Wittenberg, Halle, Germany

“Molecular structure and dynamics in lipid bilayers from solid-state NMR experiments and MD simulations”

Abstract:
Lipid bilayers are essential constituents of living cells enabling cell compartmentalization and affecting membrane protein function. It is therefore important to understand how the molecular structure and dynamics of simple lipid bilayer models are affected by a number of factors,...

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Ferreira_PSM_06122016.pdf (230,7 KB)  vom 04.11.2016

29.11.16

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

Prof. Alejandro J. Müller

University of the Basque Country, San Sebastian, Spanien

“The influence of chain topology on the crystallization of polycaprolactones (PCLs): cyclic versus linear chains"

Abstract:
Narrow polydispersity cyclic PCL samples (C-PCLs) were prepared by means of controlled click chemistry techniques in the group of Scott Garyson at Tulane University (USA). Linear PCL counterparts (L-PCLs) of almost identical molecular weights were also obtained in a Mn range spanning 2 to 22 kg/mol. The samples were studied by Differential Scanning Calorimetry (DSC), Transmission Electron Microscopy (TEM) and Polarized Light Optical Microscopy (PLOM)...

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Müller_PSM_29112016.pdf (243,7 KB)  vom 04.11.2016

15.11.16

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

Prof. Manfred Klüppel

Deutsches Institut für Kautschuktechnologie e. V., Hannover, Germany

“Flocculation Dynamics and Reinforcement of Elastomer Nanocomposites with Conductive Fillers: A Combined Rheological and Dielectric Analysis”

Abstract:
The flocculation dynamics of carbon black filled elastomer melts is investigated by dielectric relaxation spectroscopy in the frequency range from 0.1 Hz up to 10 MHz during oszillatory shearing in a plate-plate rheometer [1]. It is demonstrated that during heat treatment at low strain amplitude, a pronounced flocculation of filler particles takes place leading to a successive increase of the shear modulus and dc-conductivity...

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Klüppel_PSM_15112016.pdf (285,7 KB)  vom 04.11.2016

25.10.16

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

Prof. George Rose

Johns Hopkins University, Baltimore, USA

“Protein folding: non-specific interactions promote highly specific chain organization”

Abstract:

Under suitable conditions, globular proteins can self-assemble spontaneously and reliably.  An effective thermodynamic description of this folding reaction was established half a century ago, but a mechanistic understanding is still lacking.  This open question has been dubbed "the protein folding problem"....

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Rose_PSM_25102016.pdf (95,7 KB)  vom 19.10.2016

18.10.16

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

Dr. Angel Moreno

University of the Basque Country, San Sebastian, Spanien

“Single-Chain Polymer Nanoparticles: Models for Intrinsically Disordered Proteins and Soft Colloids"

Abstract:

Single chain nanoparticles (SCNPs) are an emergent and promising class of synthetic nano-objects. By means of large-scale computer simulations and small-angle neutron scattering, we design and investigate different synthesis routes, leading to SCNPs with specific structures and different properties in solution. On one hand the analysis of the conformations of SCNPs synthesized in good solvent reveals that they share basic ingredients with intrinsically disordered proteins (IDPs),…

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Moreno_PSM_18102016.pdf (190,2 KB)  vom 19.10.2016

20.06.16

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

Dr. David J. Jones

School of Chemistry, Bio21 Institute, University of Melbourne, Melbourne, Australia

“SIDE-CHAIN ENGINEERING IN HIGH PERFORMANCE P-TYPE ORGANIC SEMICONDUCTORS FOR PRINTED OPV”

Abstract:
The Victorian Organic Solar Cell Consortium (VICOSC) has had a two-pronged approach to the development of printed OPV. One arm has focused on the scale-up of the printing process, translating laboratory-based process to commercially relevant systems. This work has used commercial materials and off the shelf printers, where available, to develop a materials agnostic printing process.[1] New materials, with suitable properties, can be “dropped-into” the program. A parallel program has developed new materials via a rigorous stage-gated process resulting in high performance n- and p-type organic semiconductors for our use. We are interested in the impact of chromophore side chains on materials performance...

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Jones_PSM_0200616.pdf (218,4 KB)  vom 20.05.2016

05.04.16

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

Dr. Oleksandr Dolynchuk

Leibniz-Institute of Polymer Research Dresden, Insitute Theory of Polymers

“Invertible shape-memory effect in linear polyethylene and poly(ε-caprolactone)”

Abstract:
The experimental and theoretical investigation of invertible shape-memory (SM) effect in crystallizable covalent networks is in focus due to fundamental interest of underlying molecular mechanisms and various applications of SM polymers as sensors and actuators. This work studies the invertible SM behavior of crosslinked high-density polyethylene (HDPE) and poly(ε-caprolactone) (PCL)...

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Dolynchuk_PSM_050416.pdf (248,6 KB)  vom 31.03.2016

26.01.16

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

Prof. Lillian Chong

University of Pittsburgh, Department of Chemistry

“Enhanced Sampling of Pathways and Kinetics of Rare Events using Weighted Ensembles of Trajectories”

Abstract:
The weighted ensemble (WE) path sampling strategy orchestrates quasi-independent parallel simulations that are run with intermittent communication to enhance sampling of rare events such as protein conformational changes, folding, and binding. Trajectories are pruned or replicated in a way that encourages sampling of under-explored regions without biasing the dynamics. I will present recent advances in both WE methodology and software along with applications to protein folding and binding processes in the generation of pathways, free energy landscapes, and rate constants.

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Chong_PSM_26012016.pdf (119,2 KB)  vom 10.11.2015

19.01.16

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

Prof. Alexander Wittemann

Universität Konstanz

“From nanoparticles towards “colloidal molecules” and partially beyond.”

Abstract:
The rational design of complex functional colloids from nanoscale building blocks is of significance to practical applications including sensing, photonic, and electronic devices, but it is also becoming a source of inspiration of materials scientists and engineers to create the next-generation of hierarchically organized materials. ...

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Wittemann_PSM_19012016.pdf (120,2 KB)  vom 10.11.2015