Experimental set-up for measuring the non-linear dielectric effect

Orzechowski, Kazimierz; Burakowski, Andrzej

doi:10.1016/j.measurement.2018.08.071

Cited by 12 publications

(6 citation statements)

References 18 publications

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“…The capacitor was filled with liquid alcohols and mounted in an air/liquid bath thermostat. A detailed description of the experimental setup can be found in the method-related paper . The polarizing field was applied in impulses lasting from 1 to 8 ms.…”

Section: Methodsmentioning

confidence: 99%

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Premelting Phenomena in n-Alcohols from Nonanol to Dodecanol

et al. 2020

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The nonlinear dielectric effect (NDE) measurements of nonanol, undecanol, and dodecanol in the vicinity of the melting point were performed to examine and to develop the hypothesis on pretransition phenomena in decanol (Pocheć et all, J. Phys. Chem. C 2019, 123, 16929–16933). The results show that the anomalous increase of the nonlinear dielectric effect in the immediate vicinity of the melting point is uniform for each of the studied compounds. We link the observed anomaly with the formation of a liquidlike film on the surface of the solid. The scaling function describing these anomalies was proposed and tested. We proved the feasibility of NDE studies in the examination of premelting phenomena.

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Section: Methodsmentioning

confidence: 99%

“…A detailed description of the experimental setup can be found in the method-related paper. 17 The polarizing field was applied in impulses lasting from 1 to 8 ms. The procedure used in this measurement was identical to that of the previous study.…”

Section: ■ Experimentsmentioning

confidence: 99%

Premelting Phenomena in n-Alcohols from Nonanol to Dodecanol

et al. 2020

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“…Duration time of the pulses was regulated from 1 to 8 ms. Details of the measuring system designed by us are explained elsewhere . Temperature dependence of the NDE effect was measured at a single value of strong electric field.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Details of the measuring system designed by us are explained elsewhere. 18 Temperature dependence of the NDE effect was measured at a single value of strong electric field. At some temperatures the proportionality of the Δε NDE versus square of electric field was checked.…”

Section: ■ Experimental Methodsmentioning

confidence: 99%

Nonlinear Dielectric Effect in the Vicinity of Solid–Liquid Phase Transition of 1-Decanol

2019

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The motivation to perform nonlinear dielectric effect (NDE) experiments in the vicinity of the freezing− melting region of 1-decanol was the intention to observe a pretransition anomaly in supercooled liquid, similar to that announced already for nitrobenzene. In the case of 1-decanol the pretransition effects related to supercooling were not observed, but we found interesting NDE behavior in the solid state approaching the melting temperature. To our best knowledge, it is the first time that NDE was measured in the solid state close to solid−liquid phase transition. In our opinion, the observed behavior could be interpreted as an effect of appearance of the rotator phase and premelting.

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“…At the beginning of the experiment, the sample was thermostated for at least 3 h at −40 • C and then the temperature was slowly increased by 0.2 deg/min. Details of NDE equipment are presented elsewhere [38].…”

Section: Experimental Procedures: Infrared Spectroscopy (Ir) and The ...mentioning

confidence: 99%

Inside out Approach to Rotator State in Hydrogen-Bonded System—Experimental and Theoretical Cross-Examination in n-Octanol

Pocheć

Krupka

Panek

et al. 2022

IJMS

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The experimental and theoretical description of premelting behavior is one of the most challenging tasks in contemporary material science. In this paper, n-octanol was studied using a multi-method approach to investigate it at macroscopic and molecular levels. The experimental infrared (IR) spectra were collected in the solid state and liquid phase at temperature range from −84 ∘C to −15 ∘C to detect temperature-related indicators of pretransitional phenomena. Next, the nonlinear dielectric effect (NDE) was measured at various temperatures (from −30 ∘C to −15 ∘C) to provide insight into macroscopic effects of premelting. As a result, a two-step mechanism of premelting in n-octanol was established based on experimental data. It was postulated that it consists of a rotator state formation followed by the surface premelting. In order to shed light onto molecular-level processes, classical molecular dynamics (MD) was performed to investigate the time evolution of the changes in metric parameters as a function of simulation temperature. The applied protocol enabled simulations in the solid state as well as in the liquid (the collapse of the ordered crystal structure). The exact molecular motions contributing to the rotator state formation were obtained, revealing an enabling of the rotational freedom of the terminal parts of the chains. The Car–Parrinello molecular dynamics (CPMD) was applied to support and interpret experimental spectroscopic findings. The vibrational properties of the stretching of OH within the intermolecular hydrogen bond were studied using Fourier transformation of the autocorrelation function of both dipole moments and atomic velocity. Finally, path integral molecular dynamics (PIMD) was carried out to analyze the quantum effect’s influence on the bridged proton position in the hydrogen bridge. On the basis of the combined experimental and theoretical conclusions, a novel mechanism of the bridged protons dynamics has been postulated—the interlamellar hydrogen bonding pattern, resulting in an additional OH stretching band, visible in the solid-state experimental IR spectra.

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Experimental set-up for measuring the non-linear dielectric effect

Cited by 12 publications

References 18 publications

Premelting Phenomena in n-Alcohols from Nonanol to Dodecanol

Premelting Phenomena in n-Alcohols from Nonanol to Dodecanol

Nonlinear Dielectric Effect in the Vicinity of Solid–Liquid Phase Transition of 1-Decanol

Inside out Approach to Rotator State in Hydrogen-Bonded System—Experimental and Theoretical Cross-Examination in n-Octanol

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