Materials Literature
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We propose an approach to far-field optical imaging beyond the diffraction limit. The proposed system allows image magnification, is robust with respect to material losses and can be fabricated by adapting existing metamaterial technologies in a cylindrical geometry.
The surface plasmon resonance peaks of gold nanostructures can be tuned from the visible to the near infrared region by controlling the shape and structure (solid vs. hollow). In this tutorial review we highlight this concept by comparing four typical examples: nanospheres, nanorods, nanoshells, and nanocages. A combi…
Underside corrosion of a failed above ground storage tank (AST) was \ninvestigated by the physio-chemical analysis of water sample that was \ningress between the tank bottom plate and the concrete foundation. The \nresults of the water sample analysis showed pH (5.8), temperature \n(30°C), Conductivity…
Mechanical alloying of Mn-30at. % Al powder mixture resulted in the formation of an α-Mn solid solution in the early stage of milling with the subsequent formation of β-Mn phase after 30h milling. Thermal treatment at 10600 C, confirmed the recently extension of the high temperature ε-phase. However, the presence of i…
Nanocrystalline (NC) materials are exhibiting small particle size and large surface area which may be applied for gas sensors. Nano-crystalline TiO2 films are synthesized by spray pyrolysis technique. The XRD investigation for the deposited films shows that they have only polycrystalline anatase phase with nano-size.…
Abstract The article deals with the analysis of modern technologies of surface hardening and restoration of the working parts of aviation products. The technologically sophisticated methods of obtaining multifunctional composite coatings with an application of effective sources of energy are described. These methods p…
We report the crystal chemical and structural characterization of an unusual CO3-bearing sodalite-group mineral. The sample was found in metasomatic ejecta from Mount Vesuvio, Italy. The mineral is characterised by an a cell parameter of 9.0352(2) Å and by a formula, recalculated from EMPA, of (Na5.28K1.40Ca1.23Fe0.0…
Nous faisons le point des effets de l'irradiation par les neutrons sur les composites SiC/SiC et nous discutons les proprietes de ces composites necessitees par les applications nucleaires. Les effets d'irradiations a haute temperature, jusque 1600 °C, qui n'ont pas ete determines par irradiations aux neutrons, ont et…
A series of ferrocene-containing collagen models Fc-CO-(Pro-Hyp-Gly)n-Cys (n = 4 (1), 6 (2), 7 (3), 8 (4), 9 (5)) were synthesized by solid-phase synthesis. Biophysical studies using circular dichroism (CD) show that these collagen analogues form triple-helical conformations, and the peptides showed a range of thermal…
A series of well-defined linear multichromophoric foldamers with a specific sequence of alternating rigid perylene chromophores and flexible ethylene glycol chains were studied by single molecule fluorescence spectroscopy. Monomer showed minor spectral fluctuations compared to trimer and hexamer, which showed unusual…
The methods for computer characterization of voids in crystal structures using Voronoi-Dirichlet polyhedra are applied to microporous mineral phases. It is shown that these methods allow an appropriate visualization of interstitial voids, cavities, cages, and channels, which provides an estimate of their geometrical p…
Three phenylethanoid glycosides viz; -[(3′,4′-dihydroxyphenyl)-ethyl]-(4′َ′-O-caffeoyl)--D-glucoside (desrhamnosylacteoside) (1), -[(3′,4′-dihydroxyphenyl)-ethyl]-(3′′-O-Lrhamnosyl)-(4′′-O-caffeoyl)- -D-glucoside (acteoside) (2) and -[(3′,4′-dihydroxyphenyl)-ethyl]-(3′′,6′′-O-L-dirhamnosyl)-(4′′-O-caffeoyl)-…
The article deals with the analysis of modern technologies of surface hardening and restoration of the working parts of aviation products. The technologically sophisticated methods of obtaining multifunctional composite coatings with an application of effective sources of energy are described. These methods permit str…
A partir d'une breve histoire des composites ceramiques, apres avoir defini les contraintes physiques et chimiques que doivent satisfaire idealement le renfort et sa matrice ceramique oxyde, nous discutons, au travers de quelques exemples dont les aluminosilicates de lithium (LAS) des criteres contradictoires, physiqu…
This paper reports the occurrence and crystal structure of farneseite, a new member of the cancrinite-sodalite group from Farnese (Viterbo province, Latium, Italy). The mineral was observed within a syenitic ejected block consisting of dominant sanidine with minor andradite, clinopyroxene (augite), biotite, Fe-oxides…
The hydrogenation behavior of the polar intermetallic systems AeE2 (Ae = Ca, Sr, Ba; E = Al, Ga, In) has been investigated systematically and afforded the new hydrides SrGa2H2 and BaGa2H2. The structure of these hydrides was characterized by X-ray powder diffraction and neutron diffraction of the corresponding deuteri…
Phenol is a potential hazard to human health and the environment. The \nsonochemical degradation of phenol in aqueous solution was investigated \nby use of a 35 kHz bath sonicator. Experiments were performed at \ninitial phenol concentrations varying from 1 to 100 mg/L. The effects \nof parameters such…
Silicate is polymerized in the presence of chitosan to form novel silica−chitosan nanoparticles in weakly acidic solution under ambient conditions. Both the turbidity of the silica solution and the average hydrodynamic diameter of the silica nanoparticles increased dramatically after the addition of chitosan. The init…
The first successful synthesis of photoresponsive multilayer spiral nanotubes by the introduction of polyfluorinate cationic azobenzene derivative, trans-[2-(2,2,3,3,4,4,4-heptafluorobutylamino)ethyl]-{2-[4-(4-hexyphenylazo)-phenoxy]ethyl}dimethylammonium (abbreviated as C3F7-Azo+), into layered niobate interlayer I b…
We have observed that the hexagonal GaN nanowires grown from a simple chemical vapor deposition method using gallium metal and ammonia gas are usually gallium-doped. By annealing in air, the gallium-doped hexagonal GaN nanowires could be completely converted to beta-Ga(2)O(3) nanowires. Annealing the beta-Ga(2)O(3) na…