Materials Literature
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We present the linear and nonlinear optical studies on TiO 2 −SiO 2 nanocomposites with varying compositions. Optical band gap of the material is found to vary with the amount of SiO 2 in the composite. The phenomenon of two-photon absorption (TPA) in TiO 2 /SiO 2 nanocomposites has been studied using open aperture Z-…
The control of ionic transport through nanometersized pores is described by M. Gallei, A. Brunsen, and co-workers. On page 1591, the charge of mesoporous silica membranes is controlled by the oxidation or reduction of redox-responsive ferrocene-containing polymers. Depending on the surface charge, mainly determined by…
The combination of phenolic resin (PF) impregnation-pyrolysis (PIP) and MoSi2-Si-Al alloy activated melting infiltration (AAMI) combination process were used to prepare MoSi2-RSiC composites, in which the RSiC works as a matrix. Influence of infiltrated temperatures on the composition, microstructure, mechanical and e…
Up to now, the various non-volatile memory devices such as, ferroelectric random access memory (FeRAM), magnetron random access memory (MRAM), and resistance random access memory (RRAM) were widely discussed and investigated. For these nonvolatile memory devices, the resistance random access memory (RRAM) devices will…
Thermodynamic perturbation theories based on a power series in the inverse temperature have been proposed for studying the structure of square-well and square-shoulder fluids in various ranges, and the results have compared with those from computer simulations. The perturbation theory based on the hard-sphere referenc…
Calcium alginate gel beads readily interchange solutes with the bulk solution and water with the surrounding media. The transfer properties are often critical for its use, either for its stability and preservation or textural modulation, or for the convenient treatment of contained tissues for cryopreservation. Chitos…
A photosensitive structure with high room-temperature integrated sensitivity S int ≈ 700 A/lm (14500 A/W) is fabricated based on alloys of II–VI compounds n-CdS x Te1 − x and p-Zn y Cd1 − y Te. Its photoelectric properties are studied at various illumination levels and bias voltages. It is found that diffusion and dri…
In order to improve the breakdown voltage of AlGaN/GaN high electron mobility transistors (HEMTs), we report a feasible method of low density drain (LDD) HEMT. The fluoride-based plasma treatment using CF4 gas is performed on the drain-side of the gate edge. The channel two-dimensional electron gas (2DEG) concentratio…
Bifunctional magnetic‐fluorescent Fe 3 O 4 @SiO 2 @ZnS nanocomposites were synthesised by a chemical deposition method. The Fe 3 O 4 magnetic nanoparticles as the core were obtained by means of a solvothermal reaction with SiO 2 as the shell. ZnS particles were linked to Fe 3 O 4 @SiO 2 core–shell nanostructures. The…
Procesy odpuszczania i obecność wad strukturalnych powodują obniżenie twardości materiału. Celem badań była ocena przydatności układu pomiarowego: Wirotestu 1000 oraz sond specjalistycznych o ograniczonym polu pomiaru do badania lokalnych zmian mikrostruktury. Przedmiotem prób było wykrywanie pomiarami wiroprądowymi l…
Zeolite FAU type-Y is one of the most studied framework of all zeolites, and has been used as catalysts for number of reactions in the refinery and petrochemical industry. In this research, nanocrystalline zeolite Y was synthesized by hydrothermal method. The crystal size of zeolite Y is influenced by temperature, agi…
This research studied the tensile properties of glass fiber reinforced unsaturated polyester with different fiber volume fraction Vf, and angle of fibers for coarse and fine woven fibers reinforcement. The composite specimens were prepared by hand lay-up technique and cutting according to (ASTM D – 638) for tensile te…
The activation of Mo 2 B and MoB catalyst in the epoxidation of oct-1-ene with tert -butyl hydroperoxide is reported. The activation process is described by the Avraami-Erofeev topokinetic equation and includes two successive steps, viz., the nucleation and formation of a new active phase. The epoxide is produced only…
This work explores the possibility of plasma acid as acid catalyst in organic reactions. Plasma acidic water was prepared by dielectric barrier discharge and used to catalyze esterification of n-heptanioc acid with ethanol. It is found that the plasma acidic water has a stable and better performance than sulfuric acid…
Structure-based virtual screening techniques can help to identify new lead structures and complement other screening approaches in drug discovery. Prior to docking, the data (protein crystal structures and ligands) should be prepared with great attention to chemistry-related molecular details. In all cases, a wide cho…
The photon properties of two-dimensional periodic structures formed by infinite homogeneous dielectric cylinders packed in a square lattice have been investigated theoretically. Depending on the dielectric contrast between the cylinders and the surrounding medium, the photonic band structure, transmission spectra of c…
Sulfated zirconia modified with polyvalent cations is capable of catalyzing alkylation of phenol with camphene and isomerization of utane into isobutane.
Abstract An analytical heat transfer model has been development and applied for calculating the shape of the solid thickness profile for continuous casting of thin metal rods. The stationary solidification front relative to the crystallizer was received from superposition of the motions of the liquid metal flow in the…
The solubilities and the relevant physicochemical properties of the ternary systems MgCl2 + MgB6O10 + H2O and MgSO4 + MgB6O10 + H2O at 308.15 K were investigated using an isothermal dissolution method. It was found that there is one invariant point, two univariant curves, and two crystallization regions of the systems…
Experimental data on two known effects arising in response to an adiabatic elastic loading of solid bodies are presented. These are the thermoelastic effect, which consist in a change in temperature upon loading, and the frequency-elastic effect, which consists in a change in the frequency of vibrations of atoms upon…