Materials Literature
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Nanoporous anodic aluminum oxide (AAO) with uniform and controllable pore diameters and periods over a wide range has been explored for various applications due to relatively easy fabrication processes. Moreover, one of the interesting possibilities afforded by the anodization process is that the anodization can take…
Selenium (Se) is an important elemental semiconductor. Its intrinsic crystal structure is composed of hexagonally packed, one-dimensional (1D) spiral chains of Se atoms, which easily results in preferential 1D anisotropic growth along the [001] direction. In this study, we observed that planar Se multipod crystals wit…
The effect of the atmosphere in a reactor prior to hydride vapour phase epitaxy on the surface stoichiometry of both the GaN template and layer growth was studied. The surface stoichiometry of metallic Ga layers was clarified by X-ray photoelectron spectroscopy using templates without NH3 protection. The metallic Ga l…
A theoretical and computer model has been developed for the dependence of the phase-lag difference on the pretilt angle of the liquid-crystal director in cells with an inhomogeneous distribution of the director over the cell thickness and with different angles on the opposing substrates of the cell. A method is descri…
Measurements of thermal diffusivity and thermal effusivity are critical to developing a complete description of thermal transport within thermal barrier coating systems. Thermal diffusivity and thermal effusivity of coatings can be measured nondestructively using the phase of photothermal emission analysis experimenta…
For the mass production of ultra-low-carbon steel, application of the chemical vacuum method was examined in depth. In the present study, based on the results of 600-kg-scale experiments and theoretical analysis of them, the possibility of innovative creation producing ultra-low-carbon products without using a vacuum…
This study presents a new method for designing algorithm for a triplet lens with one or two elements that are made of a gradient index medium (GRIN). This method is based upon considering a well-known designed triplet lens (Cooke triplet lens) as a target lens for designing of the Hybrid Triplet Lens (HTL). Our design…
Simulation of tunnel current flowing in a p-n diode made from armchair graphene nanoribbons (AGNRs) was built. The diode is composed of p-type and n-type AGNRs and bandgaps of the AGNRs are obtained by using a tight binding method. The bandgaps are required to describe a potential profile having a potential barrier of…
This work reports the implementation and verification of a new so lver in OpenFOAM® open source computational library, able to cope with integral viscoelastic models based on the integral upper-convected Maxwell model. The code is verified through the comparison of its predictions with analytical solutions and numeric…
Magnetic spin waves (SWs) have been induced and detected in a Ni80Fe20thin film by two identical copper coplanar waveguides (CPWs). The dc fields up to 25 kA/m have been applied parallel to the CPWs, and magnetostatic surface SWs have been generated by applying voltages through the first CPW (source). The second CPW (…
The article is about ventilated system “Polialpan”. Article’s materials are based on estimated data, information taken from Media, different Internet resources, photo and video materials. The aim of the research is to show the possibility of improving of the housing stock, its reconstruction and modernization with usi…
In this paper, an algorithm based on linear regression in conjunction with the periodical nature of textile composites for improving the strain fields measured by DIC and ESPI techniques is presented. Specimens of textile composites were prepared with regular stacking of layers using vacuum assisted RTM process and th…
Reflection symmetry properties play important roles for the stability of crystal lattices in which electrons and phonons move. Based on the reflection symmetry properties, cubic, tetragonal, orthorhombic, rhombohedral (trigonal) and hexagonal crystal systems are shown to have three-dimensional (3D) k-spaces for the co…
The interaction of Cs adatoms with mono- or bi-layered graphene (MLG and BLG), free-standing or on SiO 2 substrate, was investigated using density functional theory. Smaller dipole moments created by Cs adatoms on BLG compared to MLG are predicted.
The evaporation on a superhydrophobic surface allows the fluid to dramatically concentrate. M. Khine and co-workers show in article 1400034 that the weak surface adhesion enables the fluid droplet to constantly decrease its footprint area and contact diameter. Molecules in solution are confined to a footprint that is…
In this study, we report about a stretching process coupled with the phase separation of alkali-borosilicate glasses to produce porous glasses with different degrees of pore alignment. For this purpose two different initial glasses with the composition (wt %): 62.5SiO 2 · 30.5B 2 O 3 · 7Na 2 O and respectively 70SiO 2…
The synergistic antibacterial performance against Escherichia coli (E. coli), Staphylococcus aureus and methicillin-resistant Staphylococcus aureus (MRSA) of a Cu/WO3-added PTFE (polytetrafluoroethylene) particulate composite was reported in the previous paper. The origin of the synergistic antibacterial performance i…
Nd-doped BiFeO3 (BNF) thin film of 170 nm thickness was deposited on SrRuO3-coated (100) Nb-doped SrTiO3 substrate by pulsed laser deposition. Resistive switching and ferroelectric properties of BNF film capacitor were investigated by using Positive-Up-Negative-Down measurement. Switched charge without influence of th…
Since the discovery of quasicrystals began to percolate through the scientific community, thirty years ago, Delaunay sets have been the tool of choice for describing their structures geometrically. These descriptions have gradually evolved from tiling vertex models to random cluster models, as the structures of real a…
Polymer microparticles that have pollen-like surface structures can be prepared by the evaporation of an oil-in-water emulsion. Here, polystyrene, polysulfone and PMMA was dissolved in ethyl acetate (the oil phase) and mixtures of those were emulgated in aqueous solutions of various emilsiers. The polymer particles sh…