Talk (non-conference) (Invited)

FZJ-2015-05495

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Thermal diffusion: An unsolved puzzle in Soft Matter Physics

Wiegand, S. (Corresponding author)FZJ*

2015

Please use a persistent id in citations: http://hdl.handle.net/2128/9152

Abstract: Thermal diffusion: an unsolved puzzle in Soft Matter PhysicsSimone WiegandResearch Center Juelich, ICS – Soft condensed matter, D-52425 Juelich, GermanyE-mail: s.wiegand@fz-juelich.deIt turns out that a simple non-equilibrium environment created by a temperature gradient can be used to monitor the reaction kinetics of large proteins with small substrate molecules. This is probably caused by a change in the hydration layer of the protein which is influenced by subtle conformations changes induced by the binding of the substrate molecule. To get a better understanding of phenomenon we investigated systematically various small molecules, microemulsions and colloids by a holographic grating method called infrared thermal diffusion forced Rayleigh scattering (IR-TDFRS). Looking at the various systems we can identify certain rules of thumb which will be discussed. Open questions such as the radial dependence of the thermal diffusion coefficient and its relation with the interfacial tension and charge effects are considered.

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Contributing Institute(s):

1. Weiche Materie (ICS-3)

Research Program(s):

1. 551 - Functional Macromolecules and Complexes (POF3-551) (POF3-551)

Appears in the scientific report 2015

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Database coverage:

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