Materials Literature
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We present a derivation of the sharp-interface limit of a generic fluctuating phase-field model for solidification. As a main result, we obtain a sharp-interface projection which presents noise terms in both the diffusion equation and in the moving boundary conditions. The presented procedure does not rely on the fluc…
Recently we have predicted [Phys. Rev. Lett. May 2005(cond-mat/0504694)] that Ti-decorated carbon nanotubes can absorb up to 8-wt% hydrogen at ambient conditions. Here we show that similar phenomena occurs in light transition-metal decorated C60. While Sc and Ti prefers the hexagon (H) sites with a binding energy of 2…
Ultra low momentum neutron catalyzed nuclear reactions in metallic hydride system surfaces are discussed. Weak interaction catalysis initially occurs when neutrons (along with neutrinos) are produced from the protons which capture ``heavy'' electrons. Surface electron masses are shifted upwards by localized condensed…
A tunable conductivity has been achieved by controllable substitution of an ultraviolet light activated electronic conductor. The transparent conducting oxide system H-doped Ca12−xMgxAl14O33 (x=0,0.1,0.3,0.5,0.8,1.0) presents a conductivity that is strongly dependent on the substitution level and temperature. Four-poi…
The influence of annealing parameters - temperature and time - on the magnetic properties of As-capped (Ga,Mn)As epitaxial thin films have been investigated. The dependence of the transition temperature (Tc) on annealing time marks out two regions. The Tc peak behavior, characteristic of the first region, is more pron…
We investigate the interaction of two Mn ions in the dilute magnetic semiconductor GaMnAs using the variational envelope wave function approach within the framework of six band model of the valence band. We find that the effective interaction between the Mn core spins at a typical separation d is strongly anisotropic…
In this study we report the effect of sintering temperature on the low field magnetotransport properties of La_0.7Ca_0.3Mn_O3 manganite synthesized through polymeric precursor route. The La_0.7Ca_0.3MnO_3 has been sintered at 600^oC (S6), 700^oC (S7), 800^oC (S8), 900^oC (S9) and 1000^oC (S10). XRD confirms that phase…
We report a technique for the patterned alignment of liquid crystals on polyimide using microrubbing (μ-rubbing). Homeotropic polyimide was μ-rubbed with a metallic sphere 1 mm in diameter under a specified load of 150 grams. We observed that μ-rubbing induces a high pretilt planar alignment when homeotropic polyimide…
The thermal degradation of short nylon-6 fiber reinforced acrylonitrile butadiene rubber (NBR) composites with and without epoxy-based bonding agent has been studied by thermogravimetric analysis (TGA). It was found that the onset of degradation shifted from 330.5 to 336.1°C in the presence of short nylon fiber, the o…
Reduced activation ferritic/martensitic steels (RAFs) are leading candidates for blanket and first wall of fusion reactors where effects of displacement damage and helium production are important subjects to be investigated. To obtain systematic and accurate information of microstructural response under fusion environ…
Abstract Novel Display realizing true paper‐like whiteness has been developed, which is rewritable by utilizing the electrochromic system. Nylon/silica nanocomposite pulp holding a great deal of electrolyte was used resulting in naturally white electrochromic display which has a higher white state reflectivity of 65%,…
Abstract Dispersion of copper(II) phthalocyanine (CuPc), copper(II) phthalocyaninesulfonate (CuPcS) and cobalt(II) phthalocyaninetetrasulfonate (CoPcTS) on the surface of titanium dioxide was investigated by XRD, XPS, FT‐IR and UV‐Vis techniques. Results show that interaction between CuPc and TiO 2 was very weak and C…
In this paper, a review of the molecular aspects of fracture is given, a subject that was pioneered by S. N. Zhurkov and his colleagues. Particular attention will be paid to the mechanisms of stress transfer onto straight chain segments, the role of chain interpenetration in establishing interfacial strength during cr…
Raman spectroscopy has been used in the identification of crystallography property of nanosemiconductors. The identified result by Raman spectroscopy is consistent with that by the X-ray refraction (XRD) in bulk materials and in non-polar semiconductors, e.g., porous silicon and Si nanowires. But for nano-polar semico…
Abstract Stressed liquid crystals (SLCs) are fast light modulating materials based on polymer/liquid crystal composites. We used polarizing microscopy and fluorescence confocal microscopy to investigate liquid crystal domain sizes and shearing mechanism for SLCs with different domain sizes. We observed the stretch of…
Inorganic Scale Control Within MEG/Methanol-Treated Produced Fluids M. M. Jordan; M. M. Jordan Nalco Search for other works by this author on: This Site Google Scholar N. D Feasey; N. D Feasey Nalco Search for other works by this author on: This Site Google Scholar C. J. Johnston C. J. Johnston Nalco Search for other…
Abstract In non‐catalytic direct conversion of propylene with oxygen to propylene oxide by using dielectric barrier discharge under conditions of room temperature and atmospheric pressure, the selectivity to propylene oxide from propylene was >30% at propylene conversion ranging from 3.91% to 81.72%.
This paper presents a vector model of magnetization based on the three-dimensional (3-D) Stoner-Wohlfarth elemental operator. To account for the magnetic interactions between particles, a phenomenological mean-field approximation is employed. The paper also illustrates the numerical simulation results of the magnetiza…
The magnetic absorption of electromagnetic waves by a small metallic particle of ellipsoidal form is investigated in frequency regions both higher and lower than the characteristic frequency of the free passage of an electron between walls of the particle. The boundary conditions chosen are diffuse reflection of the e…
In this paper we propose a fractal theory for the prediction of the time-effects on the damage evolution in cracking solids. By means of the Acoustic Emission (AE) technique, we have analysed the evolution of damage in several structures by an extensive experimental analysis in time. This technique permits to estimate…