0000000000124549

AUTHOR

Ernst A. Rössler

showing 2 related works from this author

Dynamics of supercooled liquids and glassy solids

2001

Nuclear and High Energy PhysicsMaterials scienceCondensed matter physicsSpin-lattice relaxationDynamics (mechanics)Slow dynamicsSpin–lattice relaxationViscous liquidMultidimensional NMR530BiochemistryAnalytical ChemistryHeterogeneous relaxationOrientational glassesLine-shape analysisStimulated echoesSupercooled liquidsSupercoolingGlass transitionGlass transitionSpectroscopyProgress in Nuclear Magnetic Resonance Spectroscopy
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Nuclear Spin Relaxation in Viscous Liquids: Relaxation Stretching of Single-Particle Probes

2021

Spin-lattice relaxation rates R1(ω,T), probed via high-field and field-cycling nuclear magnetic resonance (NMR), are used to test the validity of frequency-temperature superposition (FTS) for the reorientation dynamics in viscous liquids. For several liquids, FTS is found to apply so that master curves can be generated. The susceptibility spectra are highly similar to those obtained from depolarized light scattering (DLS) and reveal an excess wing. Where FTS works, two approaches are suggested to access the susceptibility: (i) a plot of deuteron R1(T) vs the spin-spin relaxation rate R2(T) and (ii) a plot of R1(T) vs an independently measured reference time τref(T). Using single-frequency s…

Coupling constantCouplingHot TemperatureMagnetic Resonance SpectroscopyMaterials scienceViscosityTemperatureViscous liquidMagnetic Resonance ImagingMolecular physicsLight scatteringSpectral lineSurfaces Coatings and FilmsSuperposition principleDeuteriumMaterials ChemistryRelaxation (physics)Physical and Theoretical ChemistryThe Journal of Physical Chemistry B
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