Materials Literature
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The dissociation constants (p K a ) of dalbergin and nordalbergin were measured at 298.2 K using ultraviolet (UV) spectroscopy method. The solubilities of dalbergin and nordalbergin in water, methanol, propanone, ethyl ethanoate, trichloromethane, and hexane have been determined by the UV spectrophotometric method fro…
Tin tungstate thin films were prepared by dc magnetron sputtering method and studied by x-ray diffraction, confocal microscopy and Raman spectroscopy. It is shown that the films are composed mainly of nanocrystalline α-SnWO4 phase. The possibility to use these films as write-once optical recording media is demonstrate…
The main insulation system in high-voltage direct current (HVDC) transformer consists of oil-paper insulation. The formation of space charge in insulation paper is crucial for the dielectric strength. Unfortunately, space charge behavior changes because of the corrosive sulfur substance in oil. This paper presents the…
Sol-gel process of porous PbZr0.48Ti0.52O3 film preparation on Pt/TiO2/SiO2/Si substrates is studied. Polyvinylpyrrolidone (PVP) with molecular weight of 29000 is used as a porogen agent destroyed after annealing. The volume film porosity reaches ˜33 % at 20 wt.% PVP content that permits twice to increase the film thi…
The features of the crystal structure of c and 2c TlInS2 polytypes have been studied by single-crystal X-ray diffraction method in the temperature range 180 K–300 K. In the c polytype the appearance of the incommensurate phase with modulation vector was observed at the temperature of 238 K (on cooling). The active pha…
In situ synchrotron X-ray diffraction was used to investigate oxygen surface exchange behavior in La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ /Gd 2 O 3 -doped CeO 2 /Y 2 O 3 -stabilized ZrO 2 (LSCF/GDC/YSZ) epitaxial thin-film heterostructures. Applying electrical potentials across the heterostructure under high temperature and…
Purpose: To evaluate the mechanism of drug release of a slightly soluble drug (theophylline) from nanocomposite of zeolite (ZLT) or hydrotalcite (HTC) used as drug carrier.Methods: Nanocomposite was prepared with dispersion of either ZLT or HTC as drug carrier and theophylline (THP) as drug in drug to clay ratios of 1…
We study molecular mobility on a graphene nanoroad (GNRD), a pristine graphene strip embedded in between two hydrogenated graphene domains serving as a nanoscale pathway for transporting admolecules. Our molecular dynamics simulations using a prototype physisorbed C60 admolecule demonstrate that the proposed GNRD is a…
Aim of this study was to investigate the effects of filament cross section on the performance of automotive upholstery fabrics. Thirty-six yarns were produced by changing the cross section of poly(ethylene terephthalate) fibers (round, octolobal and W-channel) and the air-jet texturing parameters (overfeed and number…
In understanding the effect of K + substitution by M 2+ (M = Ca, Sr, and Ba) on crystallization and microstructural properties of boroaluminosilicate glass system, the SiO 2 -MgO-Al 2 O 3 -B 2 O 3 -MgF 2 -K 2 O-Li 2 O-AlPO 4 glasses were prepared by single-step melt-quenching at 1500°C. Density of base glass (2.64 g·c…
Anomalous Hall effect (AHE) has been studied for ferrimagnetic antiperovskite Mn4−xDyxN films grown by molecular-beam epitaxy. The introduction of Dy changes the AHE dramatically, even changes its sign, while the variations in magnetization are negligible. Two sign reversals of the AHE (negative-positive-negative) are…
We report grand canonical Monte Carlo studies of nitrogen (77 K) and carbon dioxide (253 K) adsorbed in graphitic slit pores with surface oxygen functionalities. The analysis is focused on the molecular orientation within the adsorption layers and the influence of surface heterogeneity on molecular density distributio…
Dissipative self-assembly is the formation of ordered structures far from equilibrium, which continuously uptake energy and dissipate it into the environment. Due to its dynamical nature, dissipative self-assembly can lead to new phenomena and possibilities of self-organization that are unavailable to equilibrium syst…
The paper presents results of tests on the possibility of utilising fabric with a deposited spatial network of multiwall carbon nanotubes (MWCNTs) as electrodes in processes of their functionalization by electrochemical methods enabling deposition of metal nanoparticles, as well as—by electropolymerization—of conducti…
In situ direct observation of the lasing process in a cholesteric liquid crystal (CLC) laser array using a CMOS camera was used to investigate discontinuous laser tuning in a parallel CLC cell. In accordance with the discontinuous pitch change by thermal energy transfer, at the same time the laser wavelength undergoes…
In this paper, a pseudo-planar conjugated swastikas metamaterial (MM) was proposed and investigated numerically at near-infrared region. Numerical results show that the circular dichroism (CD) is more than 25 dB at resonance frequencies. Owing to the stronger chirality, the refractive indices for right-handed and left…
The aim of this study is to investigate the corrosion inhibition of some plant extracts on mild steel in selected media. The plant extracts investigated are Okazi leaf (<em>Gnetum africanum</em>), Utazi leaf (<em>Gongronema latifolium</em>) and Elizabeth leaf (<em>Chromolena odaratum</em>). The selected media are 1M H…
The ability to drive the growth of nano-objects of functional materials with desired shape, size, and orientation is necessary for exploiting the potentiality of organic-based nanoelectronics. Here, we present a methodology for growing by vacuum sublimation low-dimensional structures of a free-base porphyrin, in parti…
In this study, the mechanical, thermal and viscoelastic properties of multi-walled carbon nanotube/epoxy nanocomposite at low-weight percentages of nanotubes are evaluated and discussed. In order to provide better interfacial interactions of constituent materials, the multi-walled carbon nanotubes are functionalized w…
Ferroelectric thin films are considered to be among the top candidates for room-temperature electrocaloric materials as they exhibit excellent electric properties and allow application of record high electric fields. At the same time, downsizing of ferroelectric electrocalorics brings about an unwanted but unavoidable…