Materials Literature
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Zn 3 Ta 2 O 8 is a promising host for low voltage cathodoluminescence (CL) applications. Surface chemical stability during low voltage electron beam excitation is a prime concern for phosphors to be used in various new generation information displays. Photoluminescence (PL) and CL characteristics of the Zn 3 Ta 2 O 8…
A novel photoalignment film for liquid crystals (LC) was prepared based on layer-by-layer self-assembly of photosensitive long side-chain cinnamate polyelectrolyte. A series of self-assembled films with different methylene spacer groups was prepared and used as alignment film. The film became anisotropic, and could in…
The synthesis and data of the study of new complexes of erbium and lutetium bromides with carbamide, [Ln(Ur) 4 (H 2 O) 4 ]Br 3 ( I and III ) and [Ln(Ur) 6 (H 2 O) 2 ]Br 3 ( II and IV ) (Ln = Er and Lu), by IR spectroscopy and X-ray diffraction analysis are presented. For all four compounds, coordination with metal occ…
Low density polyethylene films have been treated with titanium tetrachloride vapor by means of the molecular layer deposition method. It has been shown that such a treatment leads to a considerable improvement of the electret properties. The thermal stability of the electret homocharge has been increased by 60°C. At t…
The directional solidification of binary systems in a frontal mode and in the presence of a phase transition region (mushy zone) is theoretically studied with allowance for convective-kinetic heat-and-mass transfer mechanisms. Nonlinear mathematical models are developed for this process, and their analytical solutions…
CaO-Al 2 O 3 -SiO 2 system glasses with MgO were prepared by melt quenching. The glass structure was characterized by Infrared spectra (IR) and Differential Thermal Analysis (DTA). Dielectric properties, devitrification and chemical durability have been studied. IR spectra and DTA indicated that glass network structur…
A characteristic feature near ∼255 nm has been revealed in the optical absorption spectra of nano-graphite aqueous suspensions. This is a broad absorption peak, which is due to the surface plasmon resonance in nanographite particles. The peak shape and intensity depend on the structural quality and aggregate state of…
A method based on the sequential contact of samples for experimental studies of the initial stage of the low-temperature joining of homogeneous and heterogeneous metals is proposed. Results showing that there is interaction between samples in a certain thermal and temporal range are presented. The mechanism of the obs…
It has been revealed that a new nodal point and a region of anomalous dispersion of charge carriers can appear in the electron spectrum of graphene when the concentration of weakly bound resonance defects exceeds a certain threshold value.
Specific features of the RKKY interaction in triangular quantum dots of the graphene bilayer have been studied according to the s-d exchange model. Theoretical model calculations showed that, with allowance for an electron spectrum limited by the Dirac approximation, the dependence of the exchange interaction energy o…
A cathodic stripping of Te precursor in the presence of Cd2+ and biocompatible glutathione (GSH) was reported for facile synthesis of lowly cytotoxic and highly luminescent CdTe quantum dots (QDs) in aqueous solution. The photoluminescence, electrogenerated chemiluminescence (ECL), toxicity, and cyto-osmosis of the QD…
The results of adsorption isotherm measurements for ethylene on purified HiPco SWNTs conducted at 11 different temperatures (between 110 K and 220 K) are reported, together with a comparison with the results we have obtained for ethane on the same substrate. Two groups of distinct binding sites were observed for ethyl…
The channel spark discharge was used as a high-current density (up to 30 kA/cm 2 ) relatively low-energy (<20 keV) electron beam source in a pulsed plasma deposition (PPD) gun. The PPD gun was used for the deposition of thin films by pulsed ablation of different target materials, at a background gas pressure in the 10…
Ferrite Ni 0.75 Zn 0.25 Fe 2 O 4 was prepared by the solid-state synthesis and thermal decomposition of the complex oxalate Ni 0.75 Zn 0.25 Fe 2 (C 2 O 4 ) 3 · 6H 2 O. The oxalate precursor and the products obtained at different stages of the thermal decomposition were identified by differential thermal analysis and X…
The optimization of a process requires exact knowledge of the process, which is knowledge of correlations and inter-dependence between the process-determining variables and the knowledge over the actual condition of the process. In a data rich knowledge poor process like spinning, where the exact relationships between…
Polyoxometalates (POMs) are negatively charged clusters consisting of transition metals and oxygen atoms. There are two general types of POM activity, antiviral and antitumoral, have dominated the medicinal chemistry of these compounds. Based on synthesized four different kind of POMs, [Ce(H2O)7Cr(OH)6Mo6O18]n·4nH2O,…
In this study, transmission characteristics of single-sided and double-sided (in broadside-coupled configuration) U-shaped multiple ring resonators (UMRR) are investigated on a comparative basis for the purpose of miniaturization. Transmission spectra (i.e. |S21| versus frequency curves) of both single and double side…
The process of imposing ultrasound and its influence on the rheological properties of polymers, the high-elasticity properties of extrudates, the changes in the power of ultrasonic vibrations absorbed by a polymer in the course of extrusion, and also on the strength properties of extrudates are considered.
The basics of precession electron diffraction (PED) in a transmission electron microscope (TEM) are briefly discussed. An automated system for the mapping of nanocrystal phases and orientations in a TEM is briefly described. This system is primarily based on the projected reciprocal lattice geometry as extracted from…
Magnetic nanowire arrays formed by templated electrodeposition are a promising way of making ultra-high density magnetic recording media. We have used both Poly Carbonate Track Etched (PCTE) and Anodic Aluminum Oxide (AAO) membranes to obtain Cobalt nanowires. Also by suitably adjusting the electrodeposition process,…