Materials Literature
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A model is proposed for the LaTiO 3 compound, which allows for the strong coupling of the lattice, orbital, and magnetic subsystems of this crystal. The interaction of the lattice with the electronic structure of the LaTiO 3 compound is described by the vibronic Hamiltonian with the constants calculated using the ab i…
Single-crystalline Pt (SC-Pt) films 15–60 nm thick with an atomically flat surface were coherently grown on SrTiO 3 (100) substrates by rf magnetron sputtering using Ir buffer layers. In the epitaxial growth of PbTiO 3 films on SC-Pt films by metalorganic chemical vapor deposition, square nanoislands with heights of 3…
The present review is concerned with the way that the incorporation of carbon nanotubes (CNTs) into a fluid matrix can modify the microstructure and rheology of the resulting suspensions. Some background to CNT manufacture and in particular methods of dispersing them into a suspension is presented for a range of diffe…
A correlation between physical and optical properties of the Ge20Se70− x In10Bi x (x = 0, 2, 4, 6, 8, 10) glassy system is presented. The density of the alloys increases with an increase of the Bi content, which accounts for the concurrent increase in refractive index. The molar volume (Vm ) has been calculated from t…
Surface oxidation of vanadium dioxide films prepared by radio frequency magnetron sputtering, Wang Xue-Jin, Liang Chun-Jun, Guan Kang-Ping, Li De-Hua, Nie Yu-Xin, Zhu Shi-Oiu, Huang Feng, Zhang Wei-Wei, Cheng Zheng-Wei
Ultralong ZnO nanocombs have been synthesized on silicon substrates with a high growth rate of ∼7 μ m/s using a simple “thermal evaporation and condensation” method promoted by Cu catalysts. The lengths of the ZnO nanocombs range from several millimeters to more than one centimeter and the diameters of the branches ar…
Titanium dioxide (TiO2) nanoparticles (TNPs), once perceived as harmless, have been shown to induce cytotoxicity on various cell types under UV radiation. However, whether TNPs elicit cell death in the absence of UV has not been thoroughly studied. This study aims to investigate the TNPs-induced cell death mechanism i…
Synergistic effects of lanthanum oxide (La 2 O 3 ) on the flammability and thermal properties of intumescent flame-retardant polypropylene (IFR-PP) composites are investigated in the study. The limiting oxygen index (LOI), UL-94 test, and cone calorimeter results show that the flame retardancy of IFR-PP is improved si…
We investigate the size-dependent lattice thermal conductivity of silicon (Si) square cross-sectional and cylindrical nanowires. The calculation includes the modifications of the phonon density of states and group velocities due to phonon confinement. The decrease in phonon density of states and group velocities resul…
The works on synthesis and main properties of fibrous ion exchangers are reviewed in the paper. The main attention is paid to the FIBAN materials found practical applications in water treatment and air purification processes. The following methods for preparation of ion exchange fibers have been considered: mechanical…
Eu 3+ -doped ZnO nanoneedles were fabricated by thermal evaporation. In order to include Eu in ZnO nanostructures, europium nitrate was used to produce starting droplets from which ZnO nanoneedles were grown. Photoluminescence spectra included a sharp blue peak corresponding to the ZnO band gap and a broad red band du…
In the silkmoth Bombyx mori, the germ cells first appear from the posterior ventral side of the egg (from within the mesodermal primordium) after blastoderm formation. This is in contrast to Drosophila, where germ cells appear at the posterior pole before cellular blastoderm formation. To date, germ plasm has not been…
Barium titanate (BaTiO 3 ) crystallites with various particle sizes from 10 to 300 nm were prepared by the two-step thermal decomposition method of barium titanyl oxalate nanoparticles with a particle size of 30 nm under vacuum to prepare defect-free BaTiO 3 nanoparticles with a thin surface cubic layer. Various chara…
Biopolymers such as chitosan, pectin, alginate, ı-carrageenan and gelatin, can be assembled to layered solids by direct intercalation via ion exchange in the case of smectites or a ‘co-organised assembly’ method in the case of layered double hydroxides (LDHs). Layered perovskites can be delaminated and combined with t…
During the past decades there has been minimal improvement in prevention and treatment of hypertrophic scarring. Reasons include the lack of a validated animal model, imprecise techniques to dissect scar into the histologic components, and limited methodology for measurement of gene expression. These problems have bee…
Abstract A new dispersant for stabilization of single wall carbon nanotubes (SWNTs) in water that simultaneously utilizes three different dispersion or stabilization mechanisms: surfactant adsorption, polymeric wrapping, and Coulomb repulsive interaction, has been demonstrated. The new dispersant, a charged rod‐like n…
Non doped potassium niobate (KNbO 3 ) crystal powders were synthesized by ultrasonic-assisted hydrothermal method for use in lead-free piezoelectric ceramics. By using the ultrasonic assist technique, the yield constant of the KNbO 3 crystal powders became 96% with 3 h of reaction time. It was 4 times faster than that…
Hafnium oxide films doped with CeCl 3 and/or MnCl 2 , and deposited at 300 °C by an ultrasonic spray pyrolysis process, were characterized using x-ray diffraction (XRD), energy-dispersive spectroscopy and photoluminescence. The XRD results revealed that the films are predominantly amorphous. The weak green–red emissio…
Abstract The Lembo clay deposit occurs on orthogneiss, but it also comprises clays with litho-relicts of volcanic rocks. In this study, ten samples from two sites were investigated. The mineralogical compositions consisted of kaolinite + halloysite + illite + quartz + hematite + anatase ± rutile ± orthoclase ± sanidin…
Colloidal silver nanoparticles were prepared by γ-irradiating Ag+ in aqueous solution in the presence of 2% polyvinyl pyrrolidone (PVP) as stabilising agent and ethyl alcohol as free radical (OH•) scavenger. The saturated conversion dose of Ag+ into Ag was determined by UV–Vis spectroscopy and the silver nanoparticles…