Materials Literature
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A convenient synthesis of benzene‐1,3,5‐tricarbaldehyde was developed as well as benzaldehyde derivatives carrying one or two latent aldehyde groups. The asymmetric derivatives may serve as versatile scaffolds for the synthesis of sectorial dendrimers and multifunctional molecules.
Abstract the barrier provided by the inorganic domains of organic‐inorganic hybrids towards the absorption of low molecular weight penetrants was used in this study as a basis for the development of systems capable of desorbing antioxidants at a slow rate. Polyethyleneoxide‐silica hybrids, compatibilized with glycidox…
Two separate topics on a pellet injection activity at the multimirror trap GOL-3 are presented. The first topic is connected with studies of influence of a high-energy-density plasma on solids. A carbon pellet of 2-mm diameter was injected into the plasma for this purpose. The second discussed topic is a status of wor…
Properties of structures containing an InGaAs quantum well (QW) or InAs quantum dots (QDs) as well as δ〈C〉-and δ〈Mn〉-doped layers are investigated. Most of these structures are fabricated by the MOCVD epitaxy method; δ〈Mn〉-doped layers are obtained by low-temperature laser deposition directly in the epitaxial reactor.…
The kinetics of the interaction of aluminum oxide and silicon dioxide single crystals with phosphoric acid is investigated under isothermal treatment at temperatures in the range 250–350°C. The probable mechanism of the reactions of Al 2 O 3 and SiO 2 with phosphoric acid is considered. The influence of the structure…
Supersaturated Al-4.8Zn-1.2Mg-0.14Zr and Al-5.7Zn-1.9Mg-0.35Cu (wt.%) alloys were processed by Equal-Channel Angular Pressing (ECAP) at 200°C. The crystallite size distribution and the characteristic parameters of the dislocation structure of both Al matrix and precipitates were determined by X-ray diffraction line pr…
Hydrogen storage materials suffer different degradation processes when they are cycled, forming and decomposing their associated hydride phases. In order to study these processes, we have designed and built an automated apparatus specifically developed for cycling samples of hydride forming materials by changing the e…
Abstract The dehydrocondensation reactions of α,ω–bis(trimethylsiloxy)methylhydridesiloxane with saturated primary n‐alcohols in the presence of anhydrous powder‐like potassium hydroxide or platinum on the carbon (Pt/C‐5%) at 1:30 ratio of initial compounds, at various temperature (40–60 °C) was carried out, and methy…
A new organic/inorganic salt formed by mixed-valence dibenzotetrathiafulvalene (DBTTF) radical cations and the spherical Keggin-type polyoxometalate anions [H 3 BW 12 O 40 ] 2− was obtained by electrochemical oxidation of the donor in an acetonitrile and a 1,2-dichloroethane solution containing the polyanion. The comp…
The luminescence of three natural samples of leucophanite (ideally, NaCaBeSi 2 O 6 F) has been investigated with ion-beam excitation and by electron spin resonance (ESR). A blue luminescence, ascribed to a defect associated with SiO 4 or BeO 4 tetrahedra, and an orange luminescence, ascribed to an Mn 2+ center, domina…
Article Kinetics of Strontium Titanate Formation from Solid State Reaction between Strontium Carbonate and Anatase was published on February 1, 2007 in the journal High Temperature Materials and Processes (volume 26, issue 1).
This paper presents a review of foreign papers of recent years on new electrooptic molecular crystals. It is shown that they are promising for electrooptic devices of submillimeter range because of their unique combination of high electrooptic sensitivity (up to 700 pm/V) with low permittivity (5.2). Results of experi…
Poly 3-hydroxybutyrate (PHB) as a kind of polysaccharides has been proved promising for tissue engineering because of its biocompatibility and biodegradability. But its poor mechanical properties and hydrophilicity limit its application. In order to explore a new useful porch to improve the performance of PHB-based GT…
The structure of M -Li 2 Mo 4 O 13 has been determined. M- Li 2 Mo 4 O 13 crystallizes in the monoclinic and noncentrosymmetric space group P 2 1 (No. 4) with cell parameters a = 8.2178(5) Å, b = 21.2814(13) Å, c = 8.5950(5) Å, β = 96.0880(10)°, Z = 2, and final residuals of R1 = 0.0225 and wR2 = 0.0536. M -Li 2 Mo 4…
In recent years, the ability to grow single crystal layers of both doped and pure diamonds has improved, and devices for applications in high power electronics and microelectronics are being developed, most of them based on boron doped diamond. In this work, convoluted angular and energy spectra (so-called secondary i…
Abstract The phase equilibria and thermodynamic properties in the ZrO 2 – DyO 1.5 system have been studied using the experimental methods of X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, differential thermal analysis and high temperature drop calorimetry. The tetragonal + fluor…
The density, porosity and hardness of diamond polycrystals sintered from diamond powders of various grit sizes have been studied as functions of sintering length and temperature. Based on the derived dependences, a hypothesis has been formulated that capillary forces oppose to the compaction of diamond particles throu…
The surface coverage with atomic hydrogen (θH) is calculated for iron electrode as a function of the number of adsorbed tetrabutylammonium cations and hydrogen concentration in the metal phase (C H). It is shown that the effect of the organic inhibitor of acid corrosion on the rate of iron potentiostatic dissolution i…
This paper reports on the results of investigations into the concentration dependences of the magnetostrictive susceptibility, the magnetostriction, the magnetization, and the Curie temperature for Tb0.3Dy0.67Ho0.03Fe2−x Co x alloys upon substitution of cobalt for iron. It is revealed that the temperature of the spin-…
This article reports on the study of high-quality boron-doped diamond films using admittance techniques. We have found two well-defined energy states at 74 and 340 meV, indicating that the doping procedure has induced defects and consequently provoked the localization of carriers. This is a direct indication that ther…