28 Result(s)
within
Sylwester J. Rzoska
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Article
Open AccessNew insight into 3-picoline—deuterium oxide (D2O) mixtures of limited miscibility with the lower critical consolute temperature
Coexistence curves in mixtures of limited miscibility with the lower critical consolute temperature (LCT), of 3-picoline with deuterium oxide (D2O), and D2O/H2O have been determined. They were tested with respect...
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Article
Open AccessThe impact of ionic contribution to dielectric permittivity in 11CB liquid crystal and its colloids with BaTiO3 nanoparticles
The report shows the temperature behavior of the real part of dielectric permittivity in the static (dielectric constant) and low-frequency (LF) domains in bulk samples of 11CB and its BaTiO3-based nanocolloids. ...
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Article
Open AccessPretransitional of behavior of electrooptic Kerr effect in liquid thymol
Melting/freezing are canonical examples of discontinuous phase transitions, for which no pretransitional effects in the liquid phase are expected. For the solid phase, weak premelting effects are evidenced. Th...
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Article
Open AccessHistory-dependent phase transition character
We consider history-dependent behavior in domain-type configurations in orientational order that are formed in configurations reached via continuous symmetry-breaking phase transitions. In equilibrium, these s...
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Article
Open AccessCriticality-related fundamental bases for new generations of gas–liquid, liquid–liquid, and liquid (LE) extraction technologies
The report presents experimental results, which can be considered as the reference for innovative generations of supercritical fluids (SCF), liquid–liquid (LL), and liquid (L) extraction technologies. They are...
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Article
Open AccessNew paradigm for configurational entropy in glass-forming systems
We show that on cooling towards glass transition configurational entropy exhibits more significant changes than predicted by classic relation. A universal formula according to Kauzmann temperature ...
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Article
Open AccessPolyvinylidene difluoride-based composite: glassy dynamics and pretransitional behaviour
This paper presents results of broadband dielectric spectroscopy studies in the composite system for which particularly strong interactions between polyvinylidene difluoride (PVDF: ferroelectric polymer, TC = 453...
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Article
Open AccessMultifold pressure-induced increase of electric conductivity in LiFe0.75V0.10PO4 glass
We investigated the impact of high pressure and high-temperature annealing on lithium-vanadium-iron-phosphate (LiFe0.75V0.10PO4) glass materials, proposed for the use in cathodes for high-performance batteries. T...
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Article
Open AccessPolymer matrix ferroelectric composites under pressure: Negative electric capacitance and glassy dynamics
This report presents the results of high-pressure and broadband dielectric spectroscopy studies in polyvinylidene difluoride (PVDF) and barium strontium titanate (BST) microparticles composites (BST/PVDF). It ...
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Article
Open AccessUnique dynamic crossover in supercooled x,3-dihydroxypropyl acrylate (x = 1, 2) isomers mixture
The previtreous dynamics in the glass-forming monomer, glycerol monoacrylate (GMA), was tested using the broadband dielectric spectroscopy (BDS). The measurements revealed a clear dynamic crossover at the temp...
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Chapter
Nonlinear Dielectric Effect in Critical Liquids
The nonlinear dielectric effect (NDE) describes changes of dielectric constant under the strong electric field, with the metric defined $$ \le...
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Article
Open AccessAccessing Forbidden Glass Regimes through High-Pressure Sub-Tg Annealing
Density and hardness of glasses are known to increase upon both compression at the glass transition temperature (Tg) and ambient pressure sub-Tg annealing. However, a serial combination of the two methods does no...
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Article
Open AccessDielectric Spectroscopy of Pressurized Saccharomyces cerevisiae
Results of broadband dielectric spectroscopy (BDS) in Saccharomyces cerevisiae (baker’s yeast), in situ as the function of pressure are presented. They show a clear evidence of a threshold to the new pattern of t...
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Article
Open AccessFragility and basic process energies in vitrifying systems
The concept of ‘fragility’ constitutes a central point of the glass transition science serving as the ‘universal’ metric linking previtreous dynamics of qualitatively distinct systems. Finding the fundamental ...
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Article
Open AccessDivergent dynamics and the Kauzmann temperature in glass forming systems
In the last decade the challenging analysis of previtreous behavior of relaxation time (τ(T)) in ultraviscous low molecular weight liquids led to the conceptual shift of the glass transition physics toward theori...
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Article
Open AccessA universal description of ultraslow glass dynamics
The dynamics of glass is of importance in materials science but its nature has not yet been fully understood. Here we report that a verification of the temperature dependencies of the primary relaxation time o...
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Chapter and Conference Paper
New Proposals for Supercritical Fluids Applications
Supercritical fluids (SCF) constitute a promising platform for future technological and environmental applications. The basic advantage of this method is their enormous selectiveness matched with a broad-range...
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Chapter and Conference Paper
About the Shape of the Melting Line as a Possible Precursor of a Liquid-Liquid Phase Transition
Several simple, non-mesogenic liquids can exists in two or more different liquid forms. When the liquid-liquid line, separating two liquid forms, meets the melting line, one can expect some kind of break on th...
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Chapter and Conference Paper
The Link Between the Pressure Evolution of the Glass Temperature in Colloidal and Molecular Glass Formers
Recently, Voigtmann [Phys. Rev. Lett. 101, 095701 (2008)] suggested the existence of the universal “generic steep“ behavior for the glass pressure vs. temperature dependence in molecular glass formers. We indicat...
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Chapter and Conference Paper
Anomalous Decoupling of the dc Conductivity and the Structural Relaxation Time in the Isotropic Phase of a Rod-Like Liquid Crystalline Compound
Recently, the isotropic phase of rod-like liquid crystalline compounds is advised as an experimental model system for studying complex glassy dynamics. One of unique phenomena occuring close to the glass tempe...
