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@INPROCEEDINGS{Wiegand:1023026,
author = {Wiegand, Simone},
title = {{T}hermophoresis: a sensor for solute-water interactions},
reportid = {FZJ-2024-01609},
year = {2024},
abstract = {Thermophoresis or Thermodiffusion describes the mass
transport in a temperature gradient. It can be used for the
characterization of protein-ligand binding reactions, in
devices for energy conversion and is discussed in the
context of the origin-of-life question. In our studies we
focus on biological and biocompatible systems. We find that
the thermodiffusion in aqueous systems is dominated by
contributions from heat of transfer, hydrogen bond and ionic
interactions. However, the separation of these effects is
often difficult, especially in case of biological systems
where a systematic exclusion of contributions may not be
feasible. We find that the thermodiffusion of non-ionic
solutes in water is dominated by the capability of the
solute to form hydrogen bonds. For these solutes we find a
clear correlation with their hydrophilicity. For ionic
solutes, even for simple salts the situation is more
complicated. Hydrogen bonding interactions are less
dominant, but we find partial agreement with the Hofmeister
series, suggesting that thermodiffusion is sensitive to
ion-specific effects. Beside the deficiencies of the
theoretical analysis, we will also elucidate the
shortcomings of the available experimental methods handling
biological multicomponent systems.},
organization = {Seminar series: Sustainable
Bioeconomy, Jülich (Germany)},
subtyp = {Plenary/Keynote},
cin = {IBI-4},
cid = {I:(DE-Juel1)IBI-4-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)31},
url = {https://juser.fz-juelich.de/record/1023026},
}