Materials Literature
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We have synthesized a Eu 2 + -activated Sr 3 MgSi 2 O 8 blue phosphor and investigated an attempt to develop blue light-emitting diodes (LEDs) by combining it with an InGaN blue LED chip ( λ em = 405 nm ) . The InGaN-based Sr 3 MgSi 2 O 8 : Eu LED lamp shows two bands at 405 and 460 nm. The 405 nm emission band is due…
MCS
Contrasting shapes and sizes of mineral filler particles provide today’s papermaker with many options to affect paper properties. One can choose between plate-like clay products, irregular-shaped products of grinding, and a diverse assortment of filler shapes that can be achieved by mineral precipitation methods. This…
The National Fuel Cell Research Center (NFCRC) was established to accelerate the evolution of fuel cells and fuel cell systems. In addition to addressing the key research challenges in the emergence of fuel cells, the Center assists the market to understand this unusual power system and the opportunities for both cent…
A cyano-bridged CuII–NiII dimeric complex [Cu(Me6Cy)][Ni(CN)4] has been synthesized and characterized by its single crystal X-ray structure determination. The square planar [Cu(Me6Cy)]2+ cation is converted to a distorted trigonal bipyramidal (TBP) geometry through ligation to one of the cyano groups of [Ni(CN)4]2− in…
Freshly prepared acid-cleaned biosilica of 21 different diatom species was studied using a combination of wide, small, and ultrasmall angle X-ray scattering analysis (WAXS, SAXS, and USAXS) in order to determine whether the structural and fractal properties from the subnanometer level up to dimensions of several micro…
We demonstrate a fast optical modulator capable of switching large amount of optical retardation(a few microns)in less than 1 ms. The result is achieved by employing a dual frequency nematic in cells with high pre-tilt alignment and by providing a special addressing scheme that features amplitude and frequency modulat…
Core/shell structures have been prepared via a mechanofusion system by employing several kinds of spherical polymers as a core material and Al 2 O 3 powder or a mixture of Al 2 O 3 and SiO 2 powders as a shell material. The effect of the kind of core polymers on the quality of the resulting hollow alumina microspheres…
The preparation of complexes of (EtO)2P(O)CH2P(O)(OEt)2 = L, with lanthanide nitrates is described. Stable complexes with composition LnL2(NO3)3 can be isolated for Ln = La–Eu and fully characterised. For Ln = Gd–Lu solid compounds could not be isolated. Conductivity and 31P NMR spectroscopy indicate structural change…
An improvement of porous silicon technology for local thermal isolation on bulk crystalline silicon is presented. The technique consists of forming an air cavity below the porous layer to increase the thermal isolation efficiency. Both porous silicon and the cavity underneath are formed during the same electrochemical…
New columnar liquid crystals and organogelator with a bitropone core were prepared. The ester derivatives had an enantiotropic hexagonal columnar phase, while the amide derivatives had an enantiotropic rectangular columnar phase and organogelation properties.
Formulas describing the energy density of electrochemical capacitors, which consist of two different capacitive electrodes, were derived. From these formulas, optimal mass ratio of two electrodes and the maximum energy density of the capacitor can be obtained based on the oxidation and reduction current densities of p…
Zn?Fe alloy electrochemically deposited on steel under various deposition conditions were investigated using anodic linear sweep voltammetry (ALSV) and X-ray diffraction (XRD) analysis for phase structure determination, energy dispersive X-ray (EDX) analysis for determination of chemical composition and polarization m…
The nanoscale growth control of oxide thin films, such as ferroelectric and magnetic materials, were explored by a novel technique based on nanoscale substrate engineering as well as atomic layer control via laser molecular beam epitaxy (laser-MBE). Atomic-scale analysis of the terminating layer of perovskite oxide fi…
A conventional solid state reaction between ZrO2, SnO2 and WO3 was used to prepare the negative thermal expansion material Zr(1−x)SnxW2O8. The strong negative thermal expansion over a broad temperature range, which is well known for the pure zirconium tungstate compound, is also demonstrated in this substituted materi…
The behavior of dissolution of fluorine from the fluorine containing synthetic slag was clarified by the shaking test under various experimental conditions. The fluorine containing minerals were cuspidine, fluorapatite and fluorite. The amount of fluorine dissolved from the slag increased with an increasing of the con…
The amphiphilic poly(ampholyte) poly(N,N-diallyl-N-hexylamine-alt-maleic acid), bearing simultaneously carboxylic acids, amines and hydrocarbon side chains, was used as a matrix to stabilize inorganic ion species (anionic as well as cationic) generated in aqueous solution from Ni(NO3)2·6H2O, Co(NO3)2·6H2O and (NH4)2Mo…
In order to clarify the mechanism of the complicated reactions in carbon composite iron ore pellets, carbon composite iron ore pellets of 3.5 mm in diameter were heated in the five conditions; (a) in vacuum, (b) the closed system after evacuation, (c)-(e) the closed system of initially 0.001, 0.01 and 0.1 MPa nitrogen…
A modular gadolinium-tagged contrast agent for magnetic resonance imaging has been characterized by mass spectrometry. The synthetic construct exhibits a molecular weight of about 8 kDa and is composed of three modules, (i) a diethylene triamine pentaacetic acid (DTPA) module for complexation of Gd3+, (ii) a peptide n…
Isomerisation of α-pinene oxide to campholenic aldehyde was performed by immobilising zinc triflate based catalysts on the surface of a spinning disc reactor (SDR). Two types of catalyst have been studied and the influence of operating parameters such as rotational speed, feed flow rate and reaction temperature on con…