Journal of Interface, Thin Film and Low Dimension Systems
Volume:6 Issue: 2, Winter-Spring 2023

We use nonequilibrium molecular dynamics (NEMD) simulations to investigate thermal rectification in the graphene/polyethylene junction. An ultra-narrow zigzag graphene is connected to a polyethylene chain with a different number of monomers. We study the dependence of thermal rectification on the sample length (L) and mean temperature (T). Moreover, we calculate the Kapitza thermal resistance at the junction and show that it depends on the temperature gradient bias. The results show that thermal rectification weakly depends on the sample length. On the other hand, mean temperature suppresses thermal rectification and decreases with increasing temperature. Finally, to explore further, we calculate the phonon density of states (DOS) and study their scattering from the junction.

The quantum resource theory tools can examine the quantumness of neutrino oscillations across macroscopic distances. Several researchers have utilized the most popular measures of quantumness, i.e. quantum entanglement, to investigate neutrino oscillations, while the quantum discord measures are rarely applied to survey this phenomenon generally, due to the inherent complexity in their definition. Recently a computable measure of quantum discord is defined for bipartite systems, which is generalized for multipartite systems. In this paper, we propose an alternative generalization for the bipartite measure, to get rid of the maximization process in the definition of total quantum correlation measure, then employ these discord measures to study the quantumness of three-flavored oscillating neutrinos, both in single-particle and wave packet approaches. To support our results, we compare outputs with those of a bona fide entanglement measure, i.e. concurrence fill. Although the results confirm the compatibility of the quantum discord and entanglement, the considered quantum discord measures include more quantum resources than the entanglement.

In this research, we fabricated a porous alumina template with nano meter funnel pores, that using two anodizing steps with different voltages by the electrochemical method. FE-SEM analysis was used to determine the pores morphology of the templates, that shows the funnel pores which are formed as a result of voltage reduction in the second anodization. In this process, by creating funnel pores, we were able to increase the porosity and the specific surface area of the porous alumina template, which can increase the electrical capacitance of the template as a capacitor dielectric from 6 pF to 50 pF at a frequency of 50 kHz. Use of this template as a capacitor dielectric would be a more effective method to improve the capacitance of capacitors. Also, by measuring the electrical capacity and loss of the samples, the conductivity at different frequencies were calculated.

A theoretical search is conducted to determine the mass spectra and wave functions of the higher di-molecular type of meson states X(3872)"," Y(4140),Z(4430),X(5568) in the Hellmann potential, with relativistic effects and corrections. Femtoscopic J/ψ bound states have essential concepts in high-energy physics, especially in creating two-point correlation functions for the hadronic molecule channels that build the T_cc state. We analytically calculated the radial part of the Schrödinger equation using the transformation to relativistic space using the normal ordering operators. The excited states of eigenenergy are obtained. The constituent mass of the di-molecular type of mesons was determined, which appears due to relativistic effects. It is informative to describe strong interactions and bound states mechanisms using quantum field theory ideas and quantum mechanics. At the conclusion of this research, we will provide advancements in the higher meson states mass spectra in the relativistic limit. The results provide satisfaction in comparison with experimental data and the work of other researchers.

Polyvinylidene Fluoride (PVDF) is one of the materials that has a great ability to form a membrane, but due to its hydrophobic nature, its use in nanofiltration membranes is problematic. The solution proposed to solve the hydrophobicity problem of PVDF is nitrogen plasma irradiation. In this research, the effect of modifying the surface characteristics of PVDF membrane by N2 plasma irradiation on filtration performance was investigated. For this purpose, the modified membranes were evaluated by SEM, FT-IR, AFM, and CA analyses and compared with the control membrane. By gradually increasing the applied power of the irradiated plasma on the surface of the membranes, the hydrophilic properties and performance of the modified membranes improved. The results indicate an improvement in the flux rejection and recovery rate in the modified membrane under N2 plasma irradiation with super hydrophilic properties compared to the pure PVDF membrane. Based on the results of the experiments, the best flux recovery rate of 11.8 and 94% rejection can be obtained for the irradiated membrane with an applied power of 120W.

In this work, we investigate the anchoring energy of a nematic liquid crystal cell with one patterned and one unpatterned surface. Surface reorientation effects are studied both in the absence of an external electric field and under the action of an external field. We consider the contribution of the saddle-splay surface energy and obtain the anchoring energies of the system. Director profiles are determined and the influence of the geometry, as well as the pitch values of the sinusoidal surface, are discussed. The reorientation of liquid crystal molecules in the vicinity of a nano-size grooved surface and the effect of different surface energy terms on the orientational behavior of a liquid crystal near the surfaces are investigated. Our calculations were performed using the Oseen-Frank theory based on nano-scale groove models. Our results reveal the crucial effects of surface and external fields on nematic reorientational behavior near a patterned surface. Also, our findings highlight the importance of the saddle-splay surface energy when comparing the Fukuda and Berreman models. Besides, it turns out that the presence of an external electric field significantly affects the results reported by these models.