Materials Literature
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Multilayers thin films consisted of TiO 2 nanoparticles and oppositely charged polyelectrolytes were fabricated by layer-by-layer self-assembly method and their properties were characterized. At pH 2.0, TiO 2 nanoparticles were maximally deposited with poly(sodium 4-styrenesulfonate) (PSS) and the thickness and the su…
This work presents the first systematic determination of the partial molar volumes of lanthanide sesquioxides in silicate melts. For this purpose, the densities of various lanthanide-bearing Na-silicate melts distributed along various binary joins, where the end-members are Na-disilicate and one of the lanthanide sesq…
Our objective in this study is to develop models which relate detailed structural parameters to performance, providing the means for predicting final film properties. In this work, we used different types of polyethylene (LLDPE, HDPE, and LDPE) at different process conditions in the film blowing process. The morpholog…
The dynamic magnetoelastic properties of a [112]-oriented magnetostrictive composite comprising 0.49 volume fraction of needle-shaped, [112]-oriented Terfenol-D particles and Spurr epoxy were investigated as a function of magnetic bias field. These properties included elastic moduli (E/sub 3//sup H/ and E/sub 3//sup B…
The efficiency of the transmission of surface plasmon waves by use of a dielectric diffraction grating is discussed. The Kretschmann device allows us to obtain a surface plasmon resonance that consists of an absorption peak in the reflection spectrum. When surface plasmon resonance occurs, the TM-polarization mode of…
New data on the specific heat, thermal expansion, and magnetization of the CaMn7O12 phase require a revision of the current concepts of the sequence of phase transitions in this compound. It is found that a spin-glass phase transition occurs in CaMn7O12 at T M = 49 K, whereas the transition at T S = 89 K exhibits the…
The phases and magnetic properties of Co-Zr-C melt-spun ribbon were studied. The Co/sub 80/Zr/sub 20/ melt-spun ribbon consisted of a metastable Co/sub 5/Zr phase together with fcc-Co and Co/sub 23/Zr/sub 6/ phases and showed a high coercivity. The small substitution of C for Zr in the Co-Zr melt-spun ribbon resulted…
The scanning Kelvin probe has been applied for the nondestructive analyses of stainless steel surfaces. The influence of oxide thickness, oxide composition, and microstructure on the Volta potential has been studied. The study was performed by subjecting stainless steel of grades AISI 304 (UNS S30400) and AISI 316 (UN…
Garnet from an aposkarn achtarandite-bearing rodingite-like rock in Sakha-Yakutia, Russia, has a Sc content close to 6 wt% Sc 2 O 3 (~0.45 apfu). The scandian garnet is a relict mineral from a hightemperature, shallow-level melilite skarn. Structural and electron microprobe data for a crystal of the scandian garnet wi…
Very often hydrochloric acid is employed in acidification operations aiming to dissolve the mineral matrix in petroleum wheel operations, which always require intense use of corrosion inhibitors. This work presents an evaluation of common indicators, phenolfthaleine, fluorescein, methylene blue, alizarine S and methyl…
The structural and optical properties of porous GaP have been studied by scanning electron microscopy, spectroscopic ellipsometry, and photoluminescence (PL) spectroscopy. Porous GaP layers were fabricated by anodic etching in HF:H2O:C2H5OH=1:1:2 electrolyte on n-type (100) and (111)A substrates. The morphology of the…
The aim of this study is to explore the potential of synthetic modifications of alginic acid as a method to enhance the stability of its complexes with divalent cations under physiological conditions. A fraction of algin's carboxylic acid moieties was substituted with thiol groups to different substitution degrees thr…
Magnetoelastic thin films are applied in remote interrogatable high-frequency devices. Integrated LC circuits operating at a frequency of 350 MHz are demonstrated. Due to the incorporation of the magnetic thin films, their inductance is sensitive to the applied external stress. A demonstrator was built, allowing a vis…
High temperatures creep rates in equiatomic NiTi alloys at three different stress levels and at different temperatures have been measured. It was obtained that the creep rate can be well described by the Dorn equation with n=3. The activation energy of the effective diffusion coefficient, Dc (characterizing the Herrin…
The recently discovered giant dielectric CaCu 3 Ti 4 O 12 (CCTO) has been reported to show dielectric constant value as high as 80,000 for single crystals and around 10,000 for ceramics. However the dielectric constant is also associated with high dissipation factor. In the present study, it has been observed that the…
We have determined the crystal structures of three homologous proteins from the pathogenic protozoans Leishmania donovani, Leishmania major, and Trypanosoma cruzi. We propose that these proteins represent a new subfamily within the isochorismatase superfamily (CDD classification cd004310). Their overall fold and key a…
Polarization reversals in ferroelectrics in the presence of 90° domain walls are studied using a simplified model. The rotation of a single polarization under the field applied perpendicularly to the original orientation correlates to the anisotropy of local potential energy. The polarization reversals in a ferroelect…
The microphase ordering processes for ABC linear triblock copolymers are investigated using dynamic density functional theory (DDFT). The implementation of the DDFT is verified by comparing the 2D equilibrium triblock morphologies it predicted with previous theory and experiments. Quenched from a disordered state, the…
A detailed investigation of the low-temperature plasticity of high-purity polycrystalline α-Ti (interstitial impurities O+N=0.06 at. %) is carried out. The temperature dependences of the yield strength, effective stress, rate sensitivity of the deforming stress, and activation volume are obtained in the temperature in…
The magnetic and dielectric properties of ceramic composites, in which 10 mol% antiferromagnetic LaMnO/sub 3/ was added to ferroelectric BaTiO/sub 3/, have been investigated. X-ray diffraction measurement showed that ceramics sintered in the range of 1050-1150/spl deg/C are composites containing a small amount of (La,…