Generic Structural Relaxation in Supercooled Liquids.
Florian Pabst,Jan Philipp Gabriel,Till Böhmer,Peter Weigl,Andreas Helbling,Timo Richter,Parvaneh Zourchang,Thomas Walther,Thomas Blochowicz +8 more
TLDR
In this paper, it was shown that the light scattering spectra of very different systems, e.g., hydrogen bonding, van der Waals liquids, and ionic systems, almost perfectly superimpose and show a generic line shape of the structural relaxation, following √ ω-1/2 at high frequencies.Abstract:
One of the unsolved problems of dynamics in supercooled liquids are the differences in spectral shape of the structural relaxation observed among different methods and substances, and a possible generic line shape has long been debated. We show that the light scattering spectra of very different systems, e.g., hydrogen bonding, van der Waals liquids, and ionic systems, almost perfectly superimpose and show a generic line shape of the structural relaxation, following ∝ ω-1/2 at high frequencies. In dielectric spectra the generic behavior is recovered only for systems with low dipole moment, while in strongly dipolar liquids additional cross-correlation contributions mask the generic structural relaxation.read more
Citations
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Predicting nonlinear physical aging of glasses from equilibrium relaxation via the material time
TL;DR: In this paper , the aging of the molecular glass 4-vinyl-1,3-dioxolan-2-one was predicted from its linear relaxation behavior, which was confirmed by computer simulations of a binary liquid mixture.
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Structural Relaxation and Recovery: A Dielectric Approach.
TL;DR: In this paper, structural recovery is linked to rate exchange and thus is distinct from structural relaxation dynamics, even in the limit of small perturbations, and structural recovery has been shown to be slower and more exponential than the equilibrium dynamics as derived from low field dielectric relaxation experiments.
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Origin of Apparent Slow Solvent Dynamics in Concentrated Polymer Solutions
TL;DR: In this article, the authors combine depolarized dynamic light scattering and molecular dynamics simulations to show that long-lived solvent-solvent cross-correlations cause these slow solvent contributions.
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Comparative analysis of dielectric, shear mechanical and light scattering response functions in polar supercooled liquids.
TL;DR: In this paper, the authors show that the dielectric permittivity representation e*(f) reveals details of molecular motions being undetectable in other experimental methods, such as NMR, PCS, and MR.
Journal ArticleDOI
Molecular Cross-correlations Govern Structural Rearrangements in a Nonassociating Polar Glass Former.
TL;DR: In this paper , the structural relaxation of a nonassociating glass-forming liquid was analyzed using physical aging and oscillatory shear rheology to reveal that collective equilibrium fluctuations of simple liquids and not single-particle dynamics govern their structural relaxation.
References
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