Materials Literature
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Proton-conductive electrolytes of Cs H S O 4 composite were synthesized, and the influence of the matrix on their structure and proton conductivity was investigated at intermediate temperatures. As the supporting matrix, heat-treated Ti O S O 4 hydrate was used. When the matrix heat-treated at 300 ° C was employed, fo…
The surface behaviour of a two-phase polymer mixture depends on the chemical structure of the polymer components, the interaction between the two polymers and the processing conditions. The microscopic morphology and the surface composition need to be known in order to fully utilize the thin film properties. The techn…
The crystal structure of bis(acetylacetonato)lead(II) and the structure of the acetylacetone solvated lead(II) ion in solution have been determined by single-crystal X-ray diffraction and large-angle X-ray scattering (LAXS), respectively. The acetylacetone is deprotonated and acts as a bidentate anionic ligand (acac-)…
We investigate a model of anisotropic diffuse interfaces in ordered FCC crystals introduced recently by Braun et al and Tanoglu et al [3, 18, 19], focusing on parametric conditions which give extreme anisotropy. For a reduced model, we prove existence and stability of plane wave solutions connecting the disordered FCC…
Pulsed laser deposition technique was used for growing thin films of ZnO on Si (100) substrate held at different temperatures (Ts). All the as-deposited films have shown a preferential c-axis orientation associated with varying grain size as a function of Ts ranging from 100to600°C. Current-voltage (I-V) characteristi…
Water films stabilised by hydrophobic particles are found to spread rapidly up the inner walls of a glass vessel containing water and hydrophobic particles when it is shaken; shaking produces unstable particle-stabilised foam bubbles whose coalescence with the air/water interface drives film growth up the inner walls…
Electronic structure of B-doped diamond is studied based on first-principles calculations with supercell models for substitutional and interstitial doping at 1.5–3.1 at.% B concentrations. Substitutional doping induces holes around the valence-band maximum in a rigid-band fashion. The nearest neighbor C site to B show…
Colloidal semiconductor nanocrystals from CdSe show photoluminescence quenching via titration with porphyrin derivatives. This quenching is an indication of the formation of nanoassemblies via surface attachment of pyridyl linker groups. As a consequence of the complex formation, dynamic and/or static interactions bet…
We examined the claw type teeth motor as one application of the soft magnetic composite to a motor core. In order to understand quantitatively the characteristics of the claw type teeth motor, we used the 3-dimensional electromagnetic field analysis to predict its characteristics in advance and manufactured a trial mo…
Diffraction studies of nonstoichiometric compounds have revealed various diffusion scattering effects caused by formation of a short-range order related to substitutions of atoms and vacancies (or different-sort atoms) or to atomic displacements. For nonstoichiometric compounds, we consider experimental results on sho…
Submicron scale vanadia/silica hybrid nanofiber mats have been produced by electrospinning silica sol‐gel precursor containing vanadium oxytriisopropoxide (VOTIP), followed by calcinations at high temperature. The properties of the resulting inorganic hybrid nanofiber mats are compared to those of electrospun pure sil…
The sinterability of three kinds of commercially available nano-sized SiC powders and a treated nano-sized SiC powder was investigated using Al2O3-Y2O3-CaO as a sintering additive. The commercially available, as-received nano-sized SiC powders were difficult to sinter to a relative density of >95% by conventional hot…
The ICARE/CATHARE code system has been developed by the French “Institut de Radioprotection et de Suˆrete´ Nucle´aire” (IRSN) in the last decade for the detailed evaluation of Severe Accident (SA) consequences in a primary system. It is composed of the coupling of the core degradation IRSN code ICARE2 and of the therm…
An electrochemical method of preparing a porous nickel electrode by NiZn alloy formation and subsequent dealloying in zinc chloride-alkali chloride ( 60 - 40 mol % ) melts at 350 – 450 ° C was studied. X-ray diffraction measurements at different stages of dealloying suggested that two step transformation from γ- to β…
The studies on environment degradation of poly(e-caprolactone) (PCL) in various natural conditions namely in the compost with activated sludge and in seawater were done. Poly(e-caprolactone) degradation has been also carried out in laboratory conditions in seawater with sodium azide addition (NaN3, 0.195 g/L). NaN3 el…
A nuclear reactor system could provide power to support long term human exploration of the moon. Such a system would require shielding to protect astronauts from its emitted radiations. Shielding studies have been performed for a Gas Cooled Reactor system because it is considered to be the most suitable nuclear reacto…
Prior research from this laboratory demonstrated that chemically modified collagen byproducts could be used effectively as fillers during leather processing. The gelatins were reacted with glutaraldehyde and, after application to veiny leather, these highly polymerized gelatins did fill and more importantly were bound…
25 pages
L’objectif de cette contribution est d’expliciter les procédés d’interprétation des données qualitatives dans un cadre théorique spécifique, celui des microgenèses situées. Il s’agit de présenter brièvement ce cadre, puis de mettre en lumière ses exigences méthodologiques et ses procédés d’analyse. Ce faisant, la cont…
This chapter describes two enzyme immobilization methods based on the biomolecule encapsulation into polymer matrices: the sol-gel technology and the entrapment into the polymer poly(vinyl alcohol) with styrylpyridinium groups (PVA-SbQ). The sol-gel technology is based on the formation of silica matrices of metal or s…