Martin Luther University Halle-Wittenberg

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Institut für Physik - NMR

phone: +49 (0) 345 55 28551

Betty-Heimann-Str. 7
06120 Halle (Saale)

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Upcoming P3S Webinars

The online meetings take place via Zoom [click here] and open at about 1:40 pm UTC for testing and informal chat among the participants (meeting ID: 876 8664 6314, password: 459406).

Thursday, June 17, 2021, 4 pm CEST

Prof. Dr. Iain McKenzie

TRIUMF, Vancouver and Dept. of Chemistry, Simon Fraser U, Burnaby, CA

Probing the Depth Dependence of Dynamics in Polymer Glasses using β-NMR

Abstract:
The observation 27 years ago by Keddie, Jones and Cory that the glass transition temperature of polystyrene thin films decreases with decreasing film thickness led to the suggestion that there is a thin region near the free surface where the polymer motion is faster than in the bulk, but this was not confirmed directly for many years as few techniques can measure how the dynamics varies with distance from the free surface on the nanometre length  scale. I will show that β-detected nuclear magnetic  resonance (β-NMR) of implanted 8Li+ can be used  to measure the depth and temperature dependence of dynamics on the  nanosecond timescale in polystyrene thin films, which makes it possible to characterize the near-surface region. I will  examine factors that affect the near-surface region, such as the  molecular weight of polystyrene, sample processing and the presence of a  buried interface.

Prof. Dr. Tadanori Koga

Materials Science and Chemical Engineering, SUNY Stony Brook

Local heterogeneities in the structures and dynamics at the solid/polymer interfaces

Abstract:
I will present our recent findings on the local heterogeneities in the interfacial structures and dynamics at the filler/polymer and substrate/polymer interfaces using an integrated experimental and computational approach. I will also discuss how these heterogeneities affect the macroscopic properties of polymer nanocomposites and polymer thin films.

Thursday, July 1, 2021, 4 pm CEST

Prof. Dr. Niels Holten-Andersen

Dept. of Materials Science & Engineering, MIT

t/b/a

Abstract:
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Prof. Dr. Kristin K. Kumashiro

Dept. of Chemistry, University of Hawaii, Honolulu

Strategies for Characterization of Elastin

Abstract:
The elasticity of tissue in vertebrates originates from the protein elastin,  but the basis of its functionality is poorly understood. This talk will  provide an overview of our studies, which utilize a novel method of  isotopic enrichment in tandem with solid-state NMR, leading us to an improved model for this biological elastomer.

Thursday, July 15, 2021, 4 pm CEST

Prof. Dr. Jens-Uwe Sommer

Institue Theory of Polymers, IPF Dresden, Germany

Switchable polymer brushes: Concepts, Simulations and Experiments

Abstract:
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Prof. Dr. Sergei Sheiko

Dept. of Chemistry, U North Carolina at Chapel Hill

t/b/a

Abstract:
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