Low-temperature dielectric relaxation in the system silica gel–undecylenic acid

MM Lazarenko, KI Hnatiuk, SA Alekseev… - 2020 IEEE 10th …, 2020 - ieeexplore.ieee.org
The paper discusses the influence of silica gel pores' size on the structure and the dielectric
properties of the nanocrystals of undecylenic acid with the view of determining molecular …

Topological solitons in chain molecular crystals with stoichiometric obstacles and hydrogen bonds

MM Lazarenko, AN Alekseev, SA Alekseev… - Journal of Physics and …, 2020 - Elsevier
The present paper examines molecular motion mechanisms in lamellar molecular crystals of
undecylenic acid. Thermophysical, dielectric, and infrared spectroscopy methods were used …

Dielectric Relaxation in Nanocrystals: A Scale Effect

KI Hnatiuk, YF Zabashta, MM Lazarenko… - The Journal of …, 2023 - ACS Publications
The study explores a scale effect inherent to the dielectric relaxation in nanocrystals: the
dependence of dielectric relaxation parameters on the size of a nanocrystal. We offer a …

Thermally activated processes: the underlying mechanism of activated state formation

MM Lazarenko, YF Zabashta, OM Alekseev… - RSC …, 2024 - pubs.rsc.org
In the present manuscript, we highlight the contradictions in the thermally activated
processes theory which treats a system's activated state as a state of the phonon subsystem …

Topological solitons in aliphatic systems with a restricted translational mobility

MM Lazarenko, AN Alekseev, SA Alekseev… - Chemical Physics, 2020 - Elsevier
The paper discusses the features of molecular motion mechanisms in crystals of
triacylglycerols. Topological solitons in tristearin crystals nucleate on methyl groups and …

Investigation of the structure and mechanisms of thermal motion in nanostructured undecylenic acid

KI Hnatiuk, AN Alekseev, SA Alekseev… - … Crystals and Liquid …, 2020 - Taylor & Francis
We have compared the structure, phase transitions and the thermal motion mechanisms of
the undecylenic acid in bulk and inside a porous matrix using powder X-ray diffraction …

Melting of crystallites in a solid porous matrix and the application limits of the Gibbs–Thomson equation

MM Lazarenko, YF Zabashta, AN Alekseev… - The Journal of …, 2022 - pubs.aip.org
A thermodynamic model is proposed to describe the melting of lamellar crystallite in a solid
medium. This model includes a modification of the Gibbs–Thomson equation to make it …

Investigation of relaxation processes and phase transitions in the silica gel-undecylenic acid system using IR spectra in a wide temperature range

KI Hnatiuk, MM Lazarenko, SA Alekseev… - … Crystals and Liquid …, 2022 - Taylor & Francis
The study of relaxation processes in porous inhomogeneous systems via dielectric and
mechanical spectroscopy methods is associated with methodological difficulties. To …

Construction of subcritical isotherms for model and real gases on the basis of Mayer's cluster expansion

MV Ushcats, LA Bulavin - Physical Review E, 2020 - APS
Existing rigorous statistical approaches still cannot quantitatively describe condensation
phenomena in real fluids and even model systems with some simplified interaction potential …

Topological solitons in crystals formed by aliphatic molecules with dimeric rings

AN Alekseev, MM Lazarenko, SA Alekseev… - … Crystals and Liquid …, 2021 - Taylor & Francis
The paper discusses mechanisms of molecular motion in lamellar chain molecular crystals
of the stearic acid. Thermal calorimetry, dielectric and IR-spectroscopy methods indicate a …