Materials Literature
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The combination of high sensitive superconducting quantum interference device (SQUID) with high quality nanoparticles allowed to check the simplest classical model describing the magnetisation reversal by uniform rotation which were proposed more than 50 years ago by Neel, Stoner and Wohlfarth. The micrometer sized SQ…
Data on the gastrointestinal absorption of 12 elements have been reviewed. In each case, absorption is expressed as the fraction of the ingested element absorbed to blood, referred to as the f1 value, applying to intakes of unspecified chemical form by average population groups. The level of confidence in individual a…
We present a method for the synthesis of CdS and CdS x Se 1 - x nanocrystals by precipitation from a solution of cadmium carboxylate in dimethyl sulfoxide (DMSO) with or without elemental S (Se). The reaction in the presence of hydrazine has also been investigated. The CdS particle size, determined by X-ray diffractio…
A Raman analysis was conducted to examine the disordered structures of poly(lactic acid). Simulated spectra were obtained for an ensemble of chains generated by several rotational isomeric state models. Analysis of the differences between simulated and experimental spectra showed that the rotational isomeric state rep…
Optically stimulated luminescence (OSL) from Al2O3:C (ALOC) irradiated with selected heavy ions (4He, 12C, 40Ar, and 56Fe) was examined for discussion on the effectiveness of ALOC for space radiation protection dosimetry. The OSL efficiency on the absorbed dose basis was almost unity for He (LETinfinity x H2O: 2.2 keV…
A direct in-situ visualization of montmorillonite gels at 50 g/L has been obtained for the first time, using silicon fluorescence yield imaging at the ESRF ID21 X-ray microscopy line. An unexpected superstructure formed by alternating clay-rich and clay-poor domains was evidenced with mesoscopic orientational order. T…
A new, low-cost fiber glass supported activated carbon (FGAC) filter has been prepared that displays enhanced adsorption characteristics for the removal of BTEX (benzene, toluene, ethylbenzene, and p-xylene) from water to below maximum contaminant level (MCL) regulated by USEPA and two chemical warfare agent simulants…
Small-angle X-ray scattering (SAXS) experiments with in situ dehydration have been performed on small bundles of flax fibers. Analysis indicated that the structure of the cellulose microfibrils is consistent with a cross section of approximately 10 x 50 A2. The microfibril misalignment was Gaussian with a full width a…
We investigate the plasmon resonances of interacting silver nanowires with a 50 nm diameter. Both non-touching and intersecting configurations are investigated. While individual cylinders exhibit a single plasmon resonance, we observe much more complex spectra of resonances for interacting structures. The number and m…
The adsorption of CO and CO 2 on tetragonal and monoclinic ZrO 2 was investigated using infrared spectroscopy and temperature-programmed desorption spectroscopy. For this study, samples were prepared of tetragonal ZrO 2 (t-ZrO 2 ) with surface areas of 20 and 187 m 2 /g and of monoclinic ZrO 2 (m-ZrO 2 ) with surface…
Bi–Sb single crystals (with Sb concentration varied up to 30 at. %) have been subjected to impact loading in the form of dynamic indentation on their (111) cleavage planes. The resulting mechanical twins are the theme of this report. The tensile and compressive stresses developed by the spherical indenter employed hav…
The experimental plots of electric conductivity versus temperature for a porous silicon and a silicon oxide with adsorbed water exhibit features at temperatures significantly below 0°C, which are related to an ice-water phase transition in nanopores of the solid matrix.
Nickel oxide thin films form and grow when Nickel foils are exposed to an inductively coupled low pressure oxygen plasma. The resulting oxide (NiO) is identified by near-grazing X-ray diffraction and by FTIR specular reflectance spectroscopy methods. The thickness of the NiO layer increases with exposure time.
Extensive statistical investigations based on damage reports show that the corrosion damage frequency for buried water mains and distribution pipelines in Sweden increased during the 1970s and 1980s. For this reason, a number of statistical and technical investigations of the corrosion and counter-measures were carrie…
The kinetics of desorption from the adsorbed layers formed by two-dimensional (2D) islands and by a 2D gas of single atoms is considered for the case when the flux of adsorbate atoms from the gaseous phase reaches the surface. The effect of this flux on the desorption kinetics is analyzed. It is shown that this effect…
The absorption spectra of Pr 3+ and Dy 3+ ions in three glass matrices (SiO 2 -P 2 O 5 -GeO 2 , Al 2 O 3 -B 2 O 3 -SiO 2 , and LiB 3 O 5 ) are thoroughly studied in the near-IR spectral range (4600–14 300 cm −1 ). The temperature dependences of the intensity, the width, and the location of the absorption bands observe…
Solubility behavior of d-mannitol (d-man) in pure water and four water-organic solvents from 288.15 K to 318.15 K at atmospheric pressure was studied by both phase equilibria and molecular modelling methods. A dynamic method was employed to determine the data on equilibrium, both molecular dynamic (MD) simulations and…
The changes of Al species in the presence of montmorillonite (Mt) with aging were investigated using 27Al-nuclear magnetic resonance and inductively coupled plasma atomic emission spectroscopy after extraction with 1 mol L-1 KCl. Composition of the Al species in a hydroxyaluminosilicate (HAS) solution with a Si/Al mol…
The actual magnetic induction waveform of cores in electrical machines is not sinusoidal i.e. higher harmonics are always included. Thus the core loss in actual electrical machines is different from the core loss which is measured by the standard method, because the waveform of magnetic induction should be sinusoidal…
A pr i l 10, 2001