Materials Literature
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An approach based on neutron reflectometry and isotope heterostructures is presented in order to determine self-diffusivities in bulk materials on small length scales of 1--10 nm. The method is demonstrated for lithium self-diffusion in LiNbO${}_{3}$ single crystals at low temperatures of 200 and 250 \ifmmode^\circ\el…
Guided by the known reconstruction of the GaAs(111)A-2×2 surface, the Ga 3d electron surface atom core-level shifts was found to be 0.30±0.01 eV and that of the surface As atoms with three-fold Ga coordination -0.25±0.01 eV. The four-fold coordinated As surface atoms were not resolved from the bulk line. Measureable s…
The intrinsic electroresistance (ER) of polycrystalline Sm0.60Sr0.40Mn1−xFexO3 (0 ≤ x ≤ 0.02) have been investigated by magnetotransport measurements. It is found that the ER increases with x while it is suppressed by a magnetic field. These observations imply that the ER increases dramatically with the inhomogeneity…
Abstract Quasi‐aligned hexagonal Mg‐doped aluminum nitride zigzag nanowires (AlN:Mg ZNWs) were fabricated on sapphire substrates using chemical vapor deposition method. A saturated magnetic moment of ∼1 emu/cm 3 was found in the AlN:Mg ZNWs when a magnetic field was applied parallel to the sample. The AlN:Mg ZNWs exhi…
Certain models with purely repulsive pair interactions can form cluster crystals with multiply-occupied lattice sites. Simulating these models' equilibrium properties is, however, quite challenging. Here, we develop an expanded isothermal-isobaric [N]pT ensemble that surmounts this problem by allowing both particle nu…
The phosphors BaMgAl 10 O 17 : Eu 2+ ( BAM ) were prepared by a high‐temperature solid‐state reaction method using BaCO 3 , MgO , Eu 2 O 3, and Al 2 O 3 with different (α, θ, and γ) phases. The reaction processes and final products were investigated and compared using X ‐ray diffraction, scanning electron microscopy,…
A response to increasingly stringent regulation of pollution and toxicity levels in industrial waste discharge, Micellar Enhanced Ultrafiltration: Fundamentals & Applications offers the most complete book available on the benefits and use of micellar-enhanced ultrafiltration (MEUF) to achieve continuous removal of org…
This work aims to develop glass-fiber reinforced poly(1,4-butylene terephthalate) (GRPBT) composites with enhanced mechanical, thermal stability, and flame retardancy properties using a novel compound, cerium hypophosphite (CHP). Mechanical performance studies showed that both the storage modulus and the tensile stren…
We demonstrate a finite-difference time-domain (FDTD) modeling of a cloak with a nondiagonal permittivity tensor. Numerical instability due to material anisotropies is avoided by mapping the eigenvalues of the material parameters to a dispersion model. Our approach is implemented for an elliptic-cylindrical cloak in t…
Nanographene was synthesized from platelet carbon nanofiber by supercritical fluid (SCF) exfoliation without acid oxidation. During the exfoliation process, a progressive decrease in the number of layers was accompanied by the cutting of the basal plane. Raman spectroscopy was used to identify the quality of the sampl…
Abstract Large cylindrical [001] direction α‐nickel sulphate hexahydrate crystal with 20 mm diameter and 140 mm length was grown from an aqueous solution by uniaxially solution‐crystallization method of Sankaranarayanan–Ramasamy (SR). The grown crystal was examined by X‐ray diffraction, UV‐Vis‐NIR spectroscopy and TGA…
Abstract Water‐dispersible, polymer‐wrapped nanocrystals are highly sought after for use in biology and chemistry, from nanomedicine to catalysis. The hydrophobicity of their native ligand shell, however, is a significant barrier to their aqueous transfer as single particles. Ligand exchange with hydrophilic small mol…
The effects of addition of elastomers [with and without grafted maleic anhydride (MA)] on the morphology and mechanical properties of polyamide 6 (PA6) blends were studied. The Molau test was adopted to confirm the formation of a graft copolymer between PA6 and ethylene-propylene elastomer (EPM); rheologial properties…
Abstract As received and HCl treated Clinoptilolite (C)‐ethylene vinyl acetate (EVA) composites were prepared via the melt‐mixing technique, and extruded through a single‐screw extruder to obtain composite strips with an average thickness of 0.5 mm. The films were then characterized for their morphological, structural…
We have studied the Fe-based superconductor Ba${}_{0.55}$K${}_{0.45}$Fe${}_{1.95}$Co${}_{0.05}$As${}_{2}$ in order to identify the structure of the order parameter in this system by performing extensive low-temperature specific heat measurements in zero and in applied magnetic field. The pronounced superconducting jum…
Se ensayaron compuestos de polietileno de baja densidad reciclado y harina de madera y de corteza de Pinus radiata D. Don, para evaluar el efecto del contenido de harina y la densidad del compuesto sobre la absorción de agua e hinchamiento, dureza Rockwell, resistencia a la tracción y módulo de elas-ticidad en tracció…
The authors report on temporal oscillation in the first-order self-diffracted signal observed during the holographic grating recording in the azobenezne-functionalized polymer in the degenerate two-wave mixing experiment. Explanation of the oscillating character of the diffracted signal is given based on the assumptio…
Abstract Solid solutions In 2 − x Cr x Mo 3 O 12 have been prepared via the solid state reaction method. The structural and thermal expansion properties have been characterized using X‐ray diffraction. All compounds exhibit monoclinic structure with space group P2 1 /a at room temperature, and transform to orthorhombi…
Abstract Poly( L ‐lactic acid) (PLLA) films with different crystallinities were prepared by solvent casting and subsequently annealed at various temperatures ( T a ) (80–110°C). The effects of crystallinity on enzymatic degradation of PLLA films were examined in the presence of proteinase K at 37°C by means of weight…
A series of polyurethane elastomers (PUE) incorporating TDI (toluene diisocyanate) trimer were synthesized via an in-situ polymerization and prepolymer process. It was found that for the sample with 10 wt% or less TDI trimer, the stress–strain curves of PUE exhibited the characteristics of a ductile failure with relat…