Materials Literature
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Issues pertaining to the effect of quantum dots (QDs) on the properties of a nematic liquid-crystalline mesophase are briefly considered. The influence of nanoobjects representing CdSe/ZnS semiconductor QDs on the temporal characteristics of liquid crystals (LCs) belonging to the class of cyanobiphenyls has been studi…
The accuracy of protein structures, particularly their binding sites, is essential for the success of modeling protein complexes. Computationally inexpensive methodology is required for genome-wide modeling of such structures. For systematic evaluation of potential accuracy in high-throughput modeling of binding sites…
In this work, the Aluminum Conductor Composite Core¿ (ACCC) was numerically investigated to evaluate stress distributions when subjected to thermal and mechanical loads. The thermal analysis was conducted to simulate the cooling cycle of the rod from 250°C to room temperature. Three types of mechanical loads were cons…
The temperature dependence of the crystalline structure and the lattice parameters of Pb1-xLaxZr0.40Ti0.60O3 ferroelectric ceramic system with 0.00 x 0.21 was determined. The samples with x 0.11 show a cubic-to-tetragonal phase transition at the maximum dielectric permittivity, Tmax. Above this amount and especially f…
The results of studying the hydrogen permeability and physicomechanical properties of zirconium alloy irradiated with a pulse electron beam are presented. It is established that, with an increase in the beam energy, a surface layer of this material is hardened to depths of about 2.5 μμm. The depth distribution of Youn…
High-transmissivity composite left/right-handed uniaxial bulk metamaterials were fabricated in a multilayered dielectric/hole metal array technology and experimentally assessed at submillimeter wavelengths (0.4–0.9 THz) by time-domain spectroscopy. From the frequency dependence of the complex scattering parameters, we…
The structure and properties of the (001) surface of indium oxide (In 2 O 3 ) and indium tin oxide (ITO) are investigated theoretically. Ultrasoft pseudopotentials and the PBE exchange-correlation functional are used in our calculations. The calculated band structure of bulk In 2 O 3 , ITO, and their slabs with variou…
The polyaniline/polysulfone (PAN/PSF) composite films are prepared by electropolymerization, and then PtRu particles are deposited into this composite film to obtain the PtRu-modified polyaniline/polysulfone (PtRu/PAN/PSF) electrodes. Their morphology and chemical component are characterized by scanning electron micro…
Abstract This work presents the experimental characterization of the fatigue crack growth resistance of an ultrafine-grained (UFG) copper alloy with a purity level equal to 99.90%. The UFG copper has an average grain size of 300 nm obtained by a 8-passes ECAP process throughout route Bc. The crack propagation behavior…
Abstract The corrosion resistance of phosphated and painted steels is associated with the integrity of phosphate and paint layers. In this work, a methodology to measure the porosity of phosphated coatings based on cathodic polarization technique with an electrolyte of a sodium sulfate aqueous solution was developed.…
A combination of analytical, numerical, and qualitative methods is used to study competing equilibrium orientational configurations in a liquid-crystal thin film. The material is a cholesteric liquid crystal and has a negative dielectric anisotropy. The system has strong homeotropic anchoring of the liquid-crystal dir…
Abstract Micro and nano polyacrylonitrile fibers were modified to polyacrylonitrile‐monoethanolamine (PAN‐MEA) through reaction PAN with ethanolamine. The modified PAN fiber was prepared by conversion nitrile groups into hydroxyle groups using ethanolamine solution with different concentration under refluxing at 91°C.…
We investigated zinc oxide (ZnO) thin films fabricated by atomic layer deposition (ALD) for their application in thin-film transistors (TFTs). The fabricated TFTs were annealed at various temperatures in various ambient gases. The characteristics of TFTs annealed in oxygen ambient at the temperature of up to 400 °C in…
Aluminum (Al) doped zinc oxide (ZnO) thin films with doping concentration of 1 at.% have been prepared using sol-gel spin-coating method. Annealing process has been applied on the prepared thin films at temperatures between 350 and 500 °C. The thin films were characterized using X-ray diffractometer (XRD), UV-Vis-NIR…
We have fabricated and characterized field-effect transistors (FETs) with an epitaxial graphene channel on a SiC layer grown on a Si substrate. Epitaxial graphene can be formed on SiC substrates by thermal decomposition of its surface under an ultrahigh-vacuum (UHV) condition. To incorporate the thermal decomposition…
The Maxwell equations for an electromagnetic field propagating in graphene are considered taking into account strong Coulomb repulsion between electrons of the same site possessing opposite spin projections. The derived effective equation has the form of a classical 2D sine-Gordon equation. Electrons are treated in te…
The effect of high-energy mechanical processing on the adsorption behavior of the hydrophilic polymer ethyl hydroxyethyl cellulose (EHEC) on the surface of the inorganic pigments TiO 2 and Fe 2 O 3 has been studied by IR spectroscopy. High-energy processing of aqueous disperse systems of TiO 2 and Fe 2 O 3 activates t…
The paper presents an analysis of publications dealing with the study of the effect of the environment (vacuum and gaseous or liquid medium), the counterbody material, and the temperature on the tribological behavior of diamond and diamond-like coatings. The high antifriction properties of the coatings are explained b…
Abstract Die biologische Selbstorganisation ist ein sehr komplexer Vorgang und lässt sich im Grunde als Bottom‐up‐Synthese verstehen, die biomolekulare Bausteine von präzise festgelegter Form, Größe, Hydrophobie und Funktionalisierung zu Funktionsmaterialien zusammenfügt. Im Bereich der supramolekularen Chemie haben W…
The effects of dynamic strain ageing (DSA) and dynamic precipitation (DP) on the stress–strain response during low-cycle fatigue of naturally aged (NA) and peak-aged (PA) AA7030 alloy at different temperatures was investigated. The results show that the PA temper is largely unaffected by DSA/DP, and the cyclic deforma…