Materials Literature
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Abstract It is shown that porous Silicon in various geometries and morphologies can be used for novel optical elements by combining theoretical insights with suitable porous structures and some pre‐ and post‐processing of the Silicon. The paper restricts itself to light propagation in the pore direction. Theoretical a…
Nanoporous films of crystalline anatase with intended application in dye-sensitized photovoltaic cells were investigated by NMR cryoporometry, NMR diffusiometry, electron microscopy, and X-ray diffraction. The nanoparticles from which the films were subsequently sintered were prepared in two ways, one with an acidic a…
Pd/ZrO2 nanocomposite materials were synthesised following a two-step procedure. Firstly, tetragonal zirconia was prepared via a chemical route; then it was subjected to an in-situ electrochemical impregnation with palladium nanoparticles. Different process times lead to a different Pd loading in the resulting materia…
Experiments on the heat transfer characteristics and natural circulation performance of the passive residual heat removal system (PRHRS) for the SMART-P have been performed by using the high temperature/high pressure thermal-hydraulic test facility (VISTA). The VISTA facility consists of the primary loop, the secondar…
Composites consisting of different quantities of vapor grown carbon nano-fibers (untreated and oxygen plasma treated) in a polypropylene matrix have been prepared using extrusion and injection molding technique. In order to increase the adhesion between fibers and polymer matrix, oxygen plasma treatment onto the carbo…
Article Direct Bronsted acid-catalyzed derivatization of cellulose with poly(L-lactic acid) and D-mandelic acid was published on May 1, 2007 in the journal Nordic Pulp & Paper Research Journal (volume 22, issue 2).
La 2 ∕ 3 Ca 1 ∕ 3 MnO 3 (LCMO) films have been deposited on (110)-oriented SrTiO3 (STO) substrates. X-ray diffraction and high-resolution electron microscopy reveal that the (110) LCMO films are epitaxial and anisotropically in-plane strained, with higher relaxation along the [1–10] direction than along the [001] dire…
We report on the experimental realization of a magnifying superlens working in the visible frequency range. Our design is based on a metal-dielectric plasmonic metamaterial, which consists of alternating positive and negative refractive index layers.
This review explores recent developments of photoinduced electron transfer systems based on interlocked molecules, especially [60]fullerene ( C 60 ) and porphyrin-containing [2]rotaxanes. A number of synthetic methodologies for the construction of C 60 -containing interlocked molecules with various photo- and electro-…
Abstract An analysis of the steady-state film blowing process based on a two-phase constitutive model that accounts for flow-enhanced crystallization is presented. The amorphous melt phase is represented by a multi-mode Giesekus constitutive equation with a transformation-dependent relaxation time and the semi-crystal…
The article presents a three-dimensional coupled numerical solution of momentum, mass, energy and solute conservation equations, for binary alloy solidification. The interdendritic flow in the mushy zone is assumed to obey the Darcy's law. Microsegregation is governed by the lever rule, assuming local equilibrium at p…
Experimentally observed mechanisms of the formation of oxide structures on metals in electrolytes under electric discharge conditions are described. Processes of the formation of oxide layers generated by an ensemble of independent spark and arc discharges, the formation of films due to nucleation and radial growth of…
This paper presents a brief survey of the evolution of knowledge about diffraction gratings. After recalling some basic facts, historically and physically, we introduce the concept of Wood anomalies. Next, we present some recent works in order to introduce the role of bounded modes in transmission gratings. The conseq…
We prepared novel S‐shaped liquid crystal oligomers, the 4,4′‐bis(ω‐(2‐(ω‐(4‐(cyanophenyl)phenyloxy)alkyloxy)phenyloxy)alkyloxybiphenyls (S‐n ), and investigated their transition behaviour. The oligomer with even‐numbered spacers (S‐6) exhibited a nematic phase, whereas the oligomer with odd‐numbered spacers (S‐7) exh…
Yttrium aluminium garnet (YAG) doped with Eu 2+ and Eu 3+ ions is very interesting as a phosphor for conversion of light-emitting diode light for white light sources. The europium ion occupies the structural position of yttrium in yttrium aluminium garnet and has valence state Eu 3+ . Our sample was doped with Zr 4+ ,…
Abstract A paramagnetic pyroelectric 3-dimensional cyano-bridged assembly, [{MnII(H2O)2}{MnII(pyrazine)(H2O)2}{MoIV(CN)8}]·4H2O (P21) was synthesized. This compound displayed second harmonic generation with a value of 6.0 × 10−11 esu.
Ir/ZSM-5/cordierite was studied as promising catalyst for the reduction of nitrogen oxides from automobile exhaust under both stoichiometric combustion and lean conditions. ZSM-5 was in situ synthesized on the surface of honeycomb cordierite substrate and iridium was introduced to ZSM-5/cordierite by wet impregnation.…
Abstract Crevice corrosion of titanium and its alloys in 10% sodium chloride was investigated at 100°C with the aid of microelectrodes. Potential, pH and chloride ion concentration inside the crevice were monitored using an Ag/AgCl electrode, a tungsten microelectrode and a Ag/AgCl chloride ion selective microelectrod…
Original material of Campylodiscus clypeus (Ehrenberg) Ehrenberg ex Kützing, which is also the type of the name of the genus Campylodiscus Ehrenberg ex Kützing, was studied and a specimen has been selected to serve as lectotype. The size variation in two populations from two localities from two different times was ana…
In order to improve the magnetic properties of Nd–Fe–B thick film magnets prepared by pulsed laser deposition, high-speed crystallization method of a pulse annealing was adopted as a postannealing process. In the case of using a Nd2.4Fe14B target, the pulse annealing under an optimum condition for the period of 1.8s e…