Materials Literature
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Pb(Zr x Ti 1- x )O 3 (PZT) thin films with different thicknesses and compositions near the morphotropic phase boundary (MPB) were deposited on a pseudocubic LaNiO 3 (LNO) thin film electrode by chemical solution deposition (CSD) in order to elucidate effect of film thickness on the electrical properties of the resulta…
The focus of this article is on the plasma-etching behavior of films of composite materials consisting of two randomly distributed phases with different etch rates. Two etching modes are examined as follows: 1) with anisotropic flux of ions (sputtering) and 2) with isotropic flux of etchants (chemical etching). First,…
By means of numerical simulation in the framework of the 2D axisymmetric problem of continuum mechanics, the penetration of elongated porous strikers into a steel obstacle under hydrodynamic conditions (the velocity of the striker at collision is several kilometers per second) is studied. It is found that the penetrat…
Polyoxymethylene (POM)/carbon nanotubes (CNTs) (2 : 1 by weight) composite powders were prepared by a solid mechanochemical method with a self-designed pan type mill equipment. Photos of SEM and TEM show that the average size of composite powder is several micrometres, and the CNTs adhered to the surface of POM powder…
Conducting transparent polymer materials were made by applying boron-doped single-walled carbon nanotubes to the surfaces of glass and flexible polyethylene terephthalate film substrates. Optical transmission and sheet resistance measurements showed that the boron-doped coated samples had sheet resistances of ∼7kΩ∕◻ a…
The number of various existing fabric materials for different usages is unlimited. Therefore it is important to judge each textile material regarding quality and suitability before any manufacturing process. Related fabric characteristics can be subjectively assessed or objectively measured. A new field of research tr…
Titanium oxide and silicon oxide nanoparticles (TiO2 and SiO2 NPs) are selectively self-assembled on the sidewalls of single-walled carbon nanotubes (SWNTs) grown on a p-type Si substrate by using a simple UV irradiation in an aqueous media.
The investigated optically active dimeric compound, 4-n-undecyloxy-4'-(cholesteryloxycarbonyl-1-butyloxy)chalcone, shows wide temperature ranges of two twist grain boundary (TGB) phases, TGBA and TGBC*. Comprehensive dielectric studies have been carried out for this compound in the frequency range 1 Hz–10 MHz for diff…
We report the first results establishing rotational echo adiabatic passage double resonance (REAPDOR) experiments for distance measurements between a spin-1/2 (31P) and spin-7/2 (51V) pair in a series of vanadium-substituted polyoxoanionic solids from the Keggin and Wells-Dawson families. We have quantitatively measur…
The presence of nanopores formed during the equal-channel angular pressing of aluminum is revealed using small-angle x-ray scattering. The parameters of nanopores are determined, and a correlation between the level of nanoporosity and the fraction of high-angle grain boundaries is found. The data obtained indicate tha…
We have measured the resistivity, magnetoresistance, and thermopower of ceramic manganite samples La1 − x Ag y MnO3 (y ≤ x) doped with silver as functions of temperature (4.2–350 K) and magnetic field (up to 26 kOe). A metal-insulator phase transition is observed in all investigated samples at temperatures close to ro…
The first stages of the cavitation process in amorphous polymers submitted to an hydrostatic deformation in the glassy state are studied with coarse grain molecular dynamics simulations for various intermolecular interactions strengths and flexible and semi-flexible chains. For strong intermolecular interactions, the…
Nanotubes of the chrysotile structure were obtained under hydrothermal conditions in the series of hydrosilicates of the Mg 3 Si 2 O 5 (OH) 4 -Co 3 Si 2 O 5 (OH) 4 system. Substitution of cobalt ions for magnesium ions affects the conditions of formation, morphology, and size of the nanotubes. The formation of nanotub…
In this Article, we study the development of semiconductor nanocrystals (quantum dots of average diameter less than 2 nm) directly conjugated to a transporter protein human serum albumin (HSA) as fluorescent biological labels. Förster resonance energy transfer (FRET) from the amino acid tryptophan (Trp214) to quantum…
Fe-doped TiO2 rutile thin films were fabricated by reactive magnetron sputtering on SiO2 substrates under different growth conditions, and the structure and magnetism have been systematically investigated. X-ray diffraction data, atomic force microscopy, and magnetic force microscopy confirm the absence of metallic Fe…
The nanocapsules with crystalline cores of $\mathrm{Gd}{\mathrm{Al}}_{2}$ compound and shells of amorphous ${\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ were prepared by evaporating ${\mathrm{Gd}}_{x}{\mathrm{Al}}_{100\ensuremath{-}x}$ ($x=50$, 60, 70, 80, and 90) alloys using a modified arc-discharge technique. The morphologie…
Using a hydrothermal synthesis approach, large scale and laterally bridged nanowires have been grown across trenched Au∕Si, Au∕SiO2∕Si, and ZnO∕Si electrodes. This technique shows a low temperature (80°C) approach for growing ZnO nanowires on a prepatterned substrate, showing its potential for integrating with silicon…
Ternary HfB2-ZrB2 and HfB2-HfC composites (see figure) with 20 vol.-% MoSi2 were produced from commercial powder and densified through pressureless sintering. Dense materials with fine microstructures were obtained at 1900–1950 °C. Flexural strength at 1500 °C confirmed the excellent stability of the composites at hig…
In the article the analysis of the main methods of calculations of interfacial free energy and surface free energy (SEP) values of solids, in which contact angle measurements’ results play a key role, has been presented. The importance of Young’s equation and Berthelot’s hypothesis as the scientific basis of these met…
PCDD/F formation in MSWI predominantly takes place by de novo synthesis in the ash deposits in the boiler. Permanently high SO2 concentrations cause sulfation of the boiler ash and the fly ash, which leads to low chloride concentrations in the ash deposits. This results in very low PCDD/F formation rates. High SO2 lev…