Materials Literature
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B -site ordering in multiferroic Bi 2 NiMnO 6 thin film was confirmed by synchrotron X-ray diffraction. (1/2 1/2 1/2) superstructure reflection of the film clearly indicated that the Ni and Mn ions in a double-perovskite structure were ordered in a rock-salt configuration. High-flux synchrotron radiation enabled us to…
The distribution of electrons on a carbon nanotube (CNT) under microwave excitation is analyzed here. Numerical results demonstrate that electrons on CNTs are oscillating under the microwave excitation, which means that the electrons can radiate microwaves with the same frequency. The length of CNTs required for micro…
Pockwock Lake, the drinking water supply for the city of Halifax (Nova Scotia, Canada), has been impacted by the deposition of strongly acidic anions. Because long-term monitoring data are lacking, we used diatom-based paleolimnological techniques to track changes in water quality variables in this important water sou…
In this paper, an improved version of a 2-D bidirectional eigenmode expansion propagation algorithm based on Fourier series expansion for modeling optical field distribution in waveguide devices is presented. The algorithm is very simple, numerically robust, and inherently reciprocal. It does not require root searchin…
Several aromatic compounds derived from benzene by its annelation (naphthalene, anthracene, phenanthrene, pyrene) and exocyclic substitution (e.g., nitrobenzene, dinitrobenzenes, trinitrobenzene, chlorobenzene, N,N-dimethylaniline, and others) and endocyclic substitution (pyridine, quinoline, isoquinoline) efficiently…
Abstract Recently an Mg – Sn based alloy system has been investigated actively in order to develop new magnesium alloys which have a stable structure and good mechanical properties at high temperatures. Thermodynamic modeling of the Mg – Al – Mn – Sb – Si – Sn – Zn system was performed based on available thermodynamic…
Oxydation of (dpp-BIAN)Ca(THF) 4 with 0.5 equiv. of I 2 in THF yields [(dpp-BIAN)CaI(THF) 2 ] 2 (1). A corresponding neodymium compound [(dpp-BIAN)NdCl(THF) 2 ] 2 (2) has been obtained by reaction of (dpp-BIAN)Na 2 with NdCl 3 in THF. The X-ray single crystal structure analyses show 1 and 2 to be isostructural dimers…
Single-walled carbon nanotubes (SWNTs) are Introduced as a chemical sensor for the detection of sulfur dioxide (SO2) molecules. For a single bundle of SWNTs, current-voltage (I-V) curves were measured for a series of different temperatures under adsorption of SO2molecules. The I-V characteristics for a "MAT"-type thin…
In this paper, a detailed model of a Solid Oxide Fuel Cell (SOFC) tube, equipped with a tube-and-shell pre-reformer unit, is presented. Both SOFC tube and pre-reformer are discretized along their axes. Detailed models of the kinetics of the shift and reforming reactions are introduced. Energy, mole and mass balances a…
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Computer modeling of nanoscale processes provides critical quantitative insights into nanoscale self-organization, which is hard to achieve by other means. Starting from a suspension of Te nanorods, it was recently found that short nanorods (50 nm) self-organized into checkmark-like V-shaped assemblies over a period o…
ABSTRACT Like most metazoan biomineralisations, the brachiopod shell is the end product of a biologically controlled calcification process. The main agent of the control is the extracellular matrix, which is secreted by the outer mantle epithelium. This matrix mediates the calcification process by allowing crystal nuc…
Carbon nanocage, a three dimensional cage type mesoporous carbon with very high surface area and pore volume, has been functionalized with carboxyl groups for the first time via a simple oxidation using ammonium persulfate solution (APS). The carboxyl groups functionalized carbon nanocage materials have been unambiguo…
Basic issues involving movement of conductive constituents and microstructural evolution from high current density in single phase materials are well documented. Recently, electromigration of conductive constituents in multiphase materials has gained attention due to the necessity of employing such alloys for intercon…
Examination of the complexing citric acid/EDTA synthesis of (Ba 0.5 Sr 0.5 )(Co 0.8 Fe 0.2 )O 3−δ is presented by in situ X‐ray diffraction and transmission electron microscopy, which elucidate all intermediate phases and the formation of the perovskite structure for the first time.
It is shown that in a two-dimensional system with linear dispersion a resonance is present in the vicinity of the Dirac point, when the impurity perturbation magnitude exceeds the bandwidth. The corresponding spectrum rearrangement, which follows at a certain critical impurity concentration, results in a square-root d…
Ferroelectric BaTiO3 phase of a Pnma orthorhombic crystal structure is synthesized from a chemical method using a polymer complex of Ba2+ and Ti4+ with polyvinyl alcohol (PVA). After burning out the polymer at temperature as high as 550 °C in air for 2 h results in an average 15 nm crystallite BaTiO3 size, with lattic…
A series of intercalated and exfoliated nanocomposites montmorillonite-ulvan was prepared. Ulvan, extracted from the green algae, is a water-soluble polysaccharide biopolymer. Depending on the drying process, air or freeze drying, ulvan were inserted in the interlayer space or adsorbed on the both sides of inorganic l…
A synergetic effect and catalytic activity in allylbenzene isomerization have been found for the Au–Ni/SiO2 system prepared by metal-vapour synthesis.
A microwave/conventional hybrid furnace has been used to anneal virtually fully dense zinc oxide ceramics under pure conventional and a microwave/conventional hybrid heating regime with a view to obtaining evidence for the “microwave effect” during the resulting grain growth. In each case it was ensured that each samp…