112 citations · 829 across the 25 of their papers we have counts for
25 papers
Linear-limit aging times of three monoalcohols
Jan Philipp Gabriel, Jeppe C. Dyre, Tina Hecksher
This paper presents data for the physical aging of the three monoalcohols 2-ethyl-1-butanol, 5-methyl-2-hexanol, and 1-phenyl-1-propanol. Aging is studied by monitoring the dielect…
Single parameter aging and density scaling
Tina Hecksher, Kristine Niss
In a recent paper, Di Lisio et al. [J. Chem. Phys. 159 064505 (2023)] analyzed a series of temperature down-jumps using the single-parameter aging (SPA) ansatz combined with a spec…
Time reversibility during the ageing of materials
Till Böhmer, Jan P. Gabriel, Lorenzo Costigliola +4
Physical ageing is the generic term for irreversible processes in glassy materials resulting from molecular rearrangements. One formalism for describing such ageing processes invol…
Rheological model for the alpha relaxation of glass-forming liquids and its comparison to data for DC704 and DC705
Tina Hecksher, Niels Boye Olsen, Jeppe C. Dyre
Dynamic shear-modulus data are presented for the two silicone oils DC704 and DC705 for frequencies between 1 mHz and 10 kHz at temperatures covering more than five decades of relax…
Piezo-Electric Shear Rheometry: Further developments in experimental implementation and data extraction
Mathias Mikkelsen, Kira L. Eliasen, Niclas Lindemann +8
The Piezo-electric Shear Gauge (PSG) [Christensen & Olsen, Rev. Sci. Instrum. 66, 5019, 1995] is a rheometric technique developed to measure the complex shear modulus of viscous li…
Predicting nonlinear physical aging of glasses from equilibrium relaxation via the material time
Birte Riechers, Lisa A. Roed, Saeed Mehri +4
The noncrystalline glassy state of matter plays a role in virtually all fields of materials science and offers complementary properties to those of the crystalline counterpart. The…
Time-scale coupling in hydrogen- and van der Waals-bonded liquids
Lisa A. Roed, Jeppe C. Dyre, Kristine Niss +2
The coupling behavior of time scales of structural relaxation is investigated on the basis of five different response functions for 1,2,6-hexanetriol, a hydrogen-bonded liquid with…
Generalized single-parameter aging tests and their application to glycerol
Lisa Anita Roed, Tina Hecksher, Jeppe C. Dyre +1
Physical aging of glycerol following temperature jumps is studied by dielectric spectroscopy at temperatures just below the glass transition temperature. The data are analyzed usin…
Experimental evidence of a state-point dependent scaling exponent of liquid dynamics
Alejandro Sanz, Tina Hecksher, Henriette Wase Hansen +2
A large class of liquids have hidden scale invariance characterized by a scaling exponent. In this letter we present experimental evidence that the scaling exponent of liquid dynam…
Slow rheological mode in glycerol and glycerol-water mixtures
Mikkel H. Jensen, Catalin Gainaru, Christiane Alba-Simionesco +2
Glycerol-water mixtures were studied at molar concentrations ranging from (pure glycerol) to using shear mechanical spectroscopy. We observed…
Model for the alpha and beta shear-mechanical properties of supercooled liquids and its comparison to squalane data
Tina Hecksher, Niels Boye Olsen, Jeppe C. Dyre
This paper presents data for supercooled squalane's frequency-dependent shear modulus covering frequencies from 10 mHz to 30 kHz and temperatures from 168 K to 190 K; measurements…
Direct Test of Supercooled Liquid Scaling Relations
Tina Hecksher, Darius H. Torchinsky, Christoph Klieber +3
Diverse material classes exhibit practically identical behavior when made viscous upon cooling toward the glass transition, suggesting a common theoretical basis. The first-princip…
Connection between fragility, mean-squared displacement and shear modulus in two van der Waals bonded glass-forming liquids
Henriette Wase Hansen, Bernhard Frick, Tina Hecksher +2
The temperature dependence of the high-frequency shear modulus measured in the kHz range is compared to the mean-squared displacement measured in the nanosecond range for the two v…
The macroscopic pancake bounce
Jonas Andersen Bro, Kasper Sternberg Brogaard Jensen, Alex Nygaard Larsen +2
We demonstrate that the so-called pancake bounce of millimetric water droplets on surfaces patterned with hydrophobic posts [Nat. Phys. 10, 515 (2014)] can be reproduced on larger…
Linking the dielectric Debye process in 2-ethyl-1-hexanol to its density fluctuations
Tina Hecksher
We provide the first evidence that the puzzling dielectric Debye process observed in mono-alcohols is coupled to density fluctuations. The results open up for an explanation of the…
Thermalization Calorimetry: A simple method for investigating glass transition and crystallization of supercooled liquids
Bo Jakobsen, Alejandro Sanz, Kristine Niss +6
We present a simple method for fast and cheap thermal analysis on supercooled glass-forming liquids. This "Thermalization Calorimetry" technique is based on monitoring the temperat…
A systematic study of the isothermal crystallization of the mono-alcohol n-butanol monitored by dielectric spectroscopy
M. H. Jensen, C. Alba-Simionesco, K. Niss +1
Isothermal crystallization of the mono-hydroxyl alcohol n-butanol was studied with dielectric spectroscopy in real time. The crystallization was carried out using two different sam…
Direct tests of single-parameter aging
Tina Hecksher, Niels Boye Olsen, Jeppe C. Dyre
This paper presents accurate data for the physical aging of organic glasses just below the glass transition probed by monitoring the following quantities after temperature up and d…
Supramolecular structures in monohydroxy alcohols: Insights from shear-mechanical studies of a systematic series of octanol structural isomers
Tina Hecksher, Bo Jakobsen
A recent study [Gainaru et al. PRL., 112, 098301 (2014)] of two supercooled monohydroxy alcohols close to the glass-transition temperature showed that the Debye peak, thus far main…
Short-chain polymer rigidity due to the Debye process of monohydroxy alcohols
C. Gainaru, R. Figuli, T. Hecksher +4
In addition to the ubiquitous structural relaxation of viscous supercooled liquids, monohydroxy alcohols and several other hydrogen-bonded systems display a strong single-exponenti…
Identical temperature dependence of the time scales of several linear-response functions of two glass-forming liquids
Bo Jakobsen, Tina Hecksher, Kristine Niss +3
The frequency-dependent dielectric constant, shear and adiabatic bulk moduli, longitudinal thermal expansion coefficient, and longitudinal specific heat have been measured for two…
Physical aging studied by a device allowing for rapid thermal equilibration
Tina Hecksher, Niels Boye Olsen, Kristine Niss +1
Aging to the equilibrium liquid state of organic glasses is studied. The glasses were prepared by cooling the liquid to temperatures just below the glass transition. Aging followin…
Estimating the density scaling exponent of viscous liquids from specific heat and bulk modulus data
Ulf R. Pedersen, Tina Hecksher, Bo Jakobsen +4
It was recently shown by computer simulations that a large class of liquids exhibits strong correlations in their thermal fluctuations of virial and potential energy [Pedersen et a…
Physical ageing studied by a device allowing for rapid thermal equilibration
Niels Boye Olsen, Tina Hecksher, Kristine Niss +1
Ageing of organic glasses to the equilibrium liquid state is studied by measuring the dielectric loss utilizing a microregulator where temperature is controlled by means of a Pelti…