Materials Literature
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Bi(4)Ti(3)O(12) (BIT) thin films were prepared by low temperature hydrothermal synthesis on Pt/TiO(x)/SiO(2)/Si. Bi(4)Ti(3)O(12) or TiO(2) gel solution was formed and annealed at 350 degrees C. The BIT thin films were crystallized as a Bi-layer structural ferroelectric. During the hydrothermal treatment, the TiO(2) an…
The gas-phase process of formation of carbon nanostructures in an arc discharge plasma is considered. Most attention is paid to one of the key stages of the formation of these nanostructures, the transformation of plane structures into three-dimensional. The rolling up of a plane graphite sheet into a nanostructure si…
Abstract We investigated the magnetic properties of linear Fe, Co, and Ni nanowires (NW) encapsulated in zigzag ( n ,0) ( n = 5, 6, 7, 8, and 9) carbon nanotubes (CNT) using the first‐principles plane wave calculation with the generalized gradient approximation. The magnetic moments per atom for transition metal atoms…
ZnO ellipsoid-like structures assembled by ZnO nanrods were fabricated from common ZnO whiskers by autoclave tests and pyrolysis integrated method. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, and high resolution transmission electron microscopy…
The crystal structure of erythrite from Bouzaer, south Morocco, was refined through single crystal X-ray diffraction data, within monoclinic space group C 2/ m , with the following unit cell constants: a = 10.187(1) Å, b = 13.470(1) Å, c = 4.755(1) Å, β = 104.971(2)°, V = 630.3(2) Å 3 . Transition metal and magnesium…
The crystal structure of a high pressure polymorph of CaAl 2 O 4 has been investigated using laboratory X-ray powder diffraction data. The compound was prepared from a ceramic precursor in a piston cylinder apparatus at 800 °C and 20 kbar. The quenchable so-called phase-II of monocalcium aluminate adopts the monoclini…
Abstract NdFeB/α‐Fe nanocomposite magnetic powders were prepared by sonochemical process. The powders were then submitted to a hot press and subsequent hot deformation process by spark plasma sintering (SPS) technique. Effect of α‐Fe content on structure and magnetic properties of both isotropic and anisotropic magnet…
Successful rehabilitation of transverse cracked hot mix asphalt (HMA) pavements has been a challenge for state DOTs. Conventional thin HMA overlays allow the rapid return of the existing transverse cracks and thicker HMA overlays are cost prohibitive. Cold In-Place Recycling (CIR) has been shown to be a cost-effective…
Abstract A multi-methodological study, based on electron microprobe analysis (in wavelength dispersive mode), single-crystal X-ray diffraction (XRD), transmission electron microscopy and single-crystal Fourier transform infrared spectroscopy was performed in order to describe the crystal chemistry of four leucite samp…
Layered double hydroxides (LDH) are a class of ionic lamellar solids with positively charged layers of two kinds of metallic cations and exchangeable hydrated anions. Quasi-elastic neutron scattering (QENS) measurements are performed in this type of LDH structured hydrated hydrotalcite sample to study the dynamical be…
Abstract We report scanning tunneling microscopy (STM) study of surface electronic properties and charge ordering of epitaxially grown magnetite, Fe 3 O 4 , (001) films exhibiting high density of antiphase domain boundaries (APBs). STM measurements using a W tip reveal surface termination at B‐sites. Fe ions with a 0.…
El presente trabajo est abocado al estudio morfolgico, taxonmico y distribucional de las especies de diatomeas pertenecientes a los gneros Asterionellopsis, Cerataulina, Ceratoneis y Leptocylindrus halladas en aguas costeras
Abstract The use of silicon-based ceramics in power generation applications is limited by recession of the passivating SiO 2 when it reacts with water-vapor to form a volatile hydroxide. Environmental barrier coatings are used to prevent diffusion of reactive species to the structural ceramic substrate. Often these ba…
X-ray powder diffraction technique and the Rietveld refinement method have been used successfully for the qualitative and quantitative analyses of Pingguo bauxite from Guangxi, China. Qualitative phase analysis shows that the Pingguo bauxite contains diaspore (AlOOH), hematite (Fe 2 O 3 ), goethite (FeOOH), anatase (T…
The relation between the optical anisotropy of rubbed polyimide layers and the rubbing process is investigated using the recently developed polarization‐conversion guided mode technique. Results indicate that the effective optical anisotropy of the polyimide layers may be substantially changed by the rubbing process,…
Cellulose esters with linear aliphatic acyl substituents [C8 (octanoyl chloride) to C18 (stearoyl chloride)] were synthesized in homogeneous solution (DMAc/LiC1) using triethylamine (TEA) as acid-scavenger and characterized by means of elemental analysis, FT-IR and CP/MAS 13 C Solid State NMR spectroscopy. Wide angle…
Using synchrotron radiation, a single crystal investigation has been performed at 293 and 100 K for the structural characterization of the manganoan pectolite, Na(Ca 1.73 Mn 0.27 )[Si 3 O 8 (OH)] (from the pegmatite at Mt. Koashva, Khibiny alkaline massif, Kola peninsula, Russia). The data obtained are compared with o…
Hydroxyapatite/detonation nanodiamond composites are created on silica glass and cover glass by simple soaking process in an open deposition type set-up. The supersaturated solution (simulated body fluid, SBF) is prepared in a way to resemble the composition of human blood plasma. The composite growth is carried out t…
Abstract The magnetotransport properites of individual ferromagnetic nanowires (e.g. Ni, Co 23 Ni 77 , Ni 85 Fe 15 ) with 200 nm diameters were investigated. The ferromagnetic nanowires were successfully electrodeposited within an anodized alumina by controlling solution composition, temperature, and current density.…
The specific features in the structure of nanostructured glass-ceramic materials based on sodium zinc silicate glasses doped with lead sulfide are investigated using small-angle X-ray scattering and X-ray powder diffraction. It is established that a close-to-monodisperse size distribution of PbS nanocrystals is an imp…