Materials Literature
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A scheme for generating complex, spatially separated patterns of multiple types of semiconducting and/or metallic nanocrystals is presented. The process is based on lithographic patterning of organic monolayers that contain a photolabile protection group and are covalently bound to SiO2 surfaces. The process results i…
High-quality B-doped homoepitaxial diamond films have been synthesized by microwave plasma chemical-vapor-deposition (CVD) using a mixture consisting of CH 4 , H 2 , and trimethylboron B(CH 3 ) 3 diluted by H 2 gas. These films have been obtained on the basis of the approach that high-quality diamond films should be g…
The photochemistry of M3(CO)12 [M = Ru (1a), Os (1b)] with pyrazole, 3,5-dimethylpyrazole, and 3,5-diphenylpyrazole is documented. With 1a, photolysis with pyrazole leads to the substitution product HRu3(CO)10(C3H3N2) (2a). In the case of 1b, the initial product is the ortho-metallated species HOs3(CO)10(C3H3N2) (3b),…
Dans ce travail on presente une vision generale des techniques numeriques permettant une augmentation importante du rapport signal-bruit dans une grande variete d'applications comme, par exemple, dans les mesures par sonde de Langmuir destinees a la determination des fonctions de distribution de l'energie des electron…
Numerous circular, 30 to 270 μm‐diameter bore holes in several species of gastropod and bivalve shells from Julian Lake, southern Ontario, Canada are similar in appearance to the ichnotaxa Oichnus simplex, Oichnus paraboloides, and Tremichnus isp. These ichnotaxa are well described from marine systems but are rarely r…
X-ray photoemission measurements of CuSO4 are presented.
The crystal structures of five new cristobalite-related sodium aluminosilicates with four different structure types from the system Na 2− x Al 2− x Si x O 4 , 0 ≤ x ≤ 1 [Na 1.95 Al 1.95 Si 0.05 O 4 , P 4 1 2 1 2, a = 5.2997 (6), c = 7.0758 (9) Å; Na 1.75 Al 1.75 Si 0.25 O 4 , Pbca , a = 10.4221 (11), b = 14.264 (3), c…
Mechanical properties of materials are based on structure or morphology and on the micromechanical processes of deformation and fracture, i.e. on the “micromechanics”. Developments mainly in electron microscopy and scanning force microscopy opened up a wide range of experiments previously impossible, including the in…
An experimental method has been developed that uses laser-induced fluorescence detection of N atoms to monitor NO formation from a surface-catalyzed reaction on quartz. Well-characterized mixtures of N and O atoms were generated through NO titration of N atoms produced in a microwave discharge. Experiments were carrie…
A type 329Jl duplex stainless steel was gas tungsten arc welded without filler material in an Ar–N 2 gas mixture atmosphere with the aim of changing only the nitrogen content in the weld metal. The effect of nitrogen on the microstructure and corrosion properties of the weld metal was examined. An increase in nitrogen…
This work presents the first detailed study of the optical dielectric function of optically thick TiN x films using grating coupling of radiation to surface plasmon-polaritons. Angle-dependent reflectivities are obtained in the wavelength range 500–875 nm and by comparison with grating modelling theory, we determine b…
The diffuse scattering in WO3 has been investigated using high-resolution X-ray methods. The structure of the (040)/(400) diffraction profiles in a densely twinned orthorhombic crystal has been mapped. The scattering is characterised by strong, well defined Bragg peaks with a diffuse streak between these of intensity…
The structures of the cubic mesophases of a chiral and an achiral hydrazine derivative have been investigated by means of X-ray diffraction experiments. As seen from the phase diagram of the binary system, both cubic phases are incompletely miscible which can be explained by the different space groups of the cubic lat…
The micromechanical deformation processes of impact- modified polypropylene (PP) with core– shell particles derived from PP/EPR (ethylene– propylene– rubber) block copolymers and PP/PA/SEBS-g-MA (polypropy-lene / polyamide / polystyrene - block - poly(ethene - co - but -1-ene)-block-polystyrene-graft-maleic anhydride…
The time dependence of the surface potential of an insulating material is theoretically investigated in the case of simultaneous surface and volume ohmic conduction. When the material presents a constant surface conductivity, the first part of the decrease with time of the surface potential is strongly influenced by t…
The passive residual heat removal (PRHR) system in the Westinghouse AP600 advanced passive reactor design is a natural-circulation-driven heat exchanger cooled by the water in the in-containment refueling water storage tank (IRWST). During the experiments, which simulated small-break loss-of-coolant accidents in the A…
The synthesis, by two different reaction pathways, of boron-modified polysilylcarbodi-imides of general type {B[C2H4Si(R)NCN]3}n (R =singly bonded organic ligand) and the plastic-forming and the thermal behavior of these polymers are described. Compounds {B[C2H4Si(R)NCN]3}n [2a, R = H; 2b, R = CH3; 2c, R = (NCN)0.5]…
The pinning induced magnetostriction in an isotropic superconductor was calculated for different sample shapes. We analyzed some special shapes for which the solution can be found analytically. The magnetostriction of a finite slab was considered. In order to determine the influence of demagnetization effects, the pin…
V 2 O 5 /TiO 2 catalysts of varying vanadium content were prepared at various pH's and concentrations of the impregnation solution using the equilibrium deposition filtration (EDF) method. Moreover, corresponding catalysts were prepared using the conventional wet impregnation (WI) method. The above catalysts were exha…
RATIONALE AND OBJECTIVES: Immunocontrast agents used for magnetic resonance imaging require antibodies that preserve the immunoreactivity while containing a high number of chelated paramagnetic ions. METHODS: Anti-CEA F(ab')2 fragments were coupled to polylysine-Gd-DOTA and polylysine-Gd-DTPA. A paramagnetic load as h…