Materials Literature
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Nanowires with polymer shells were produced via radical grafting polymerization of methyl methacrylate using treated carbon nanotube bundles as macro-initiators, thereby providing an efficient way to produce high grafting ratio nanocomposites.
We present here the synthesis of hierarchical calcite, grown in the presence of acidic glycoproteins isolated from adult spines of the sea urchin Evechinus chloroticus. Hierarchical growth is only achieved when kinetic growth control (attained for high concentrations of calcium ion) is superimposed on the thermodynami…
The physical vapor deposition process of serial bideposition is adapted to the fabrication of uniaxial optical coatings. During the coating process the vapor impinges at an angle of incidence of about 70 on to the substrate, and a stepwise axial rotation with 90 increments causes a columnar structure to grow normal to…
The cathodoluminescence and optical-transmission spectra of ZnS were analyzed to study the effect of a high hydrostatic gas pressure (1500 atm at 1000°C) on the equilibrium between intrinsic point defects in zinc sulfide grown by chemical vapor deposition (CVD) with an excess of zinc. The cathodoluminescence spectra w…
The effect of carbon topology on nitrogen adsorption at zero coverage on a variety of carbonaceous materials: graphite, a nanotube bundle, C60 fullerite, C168 schwarzite, and a nanoporous carbon is studied systematically using full atomistic Monte Carlo simulations. The pairwise additive site–site Lennard-Jones potent…
There are two eutectic systems in the Al2O3-rich portion of the Al2O3–Y2O3 system: one is the Al2O3–YAG equilibrium eutectic system and the other is the Al2O3–YAP metastable eutectic system. Heating the Al2O3–YAP metastable eutectic structure up to temperatures above the metastable eutectic temperature but below the e…
High pressure synthesis under 6 GPa using a cubic-anvil-type apparatus were applied to investigation of new compounds in Mg-TM systems. The crystal structure, thermal stability and reactivity with hydrogen for the newly synthesized compounds were studied. The Mg4Ni compound belonging to space group F43m with a lattice…
A backcrossed population (BC1) was derived from a cross between C100 and Dazao. AFLP technique was employed for mapping the QTLs. The QTLs for the whole cocoon weight, cocoon shell weight, ratio of cocoon shell, weight of pupae etc. were analyzed and 11 QTLs were detected based on the constructed linkage map. Two QTLs…
Disorder in Gd2Ti2O7 is investigated by near-edge x-ray-absorption fine structure (NEXAFS) and x-ray photoelectron spectroscopy (XPS). NEXAFS shows Ti4+ ions occupy octahedral sites with a tetragonal distortion induced by vacant oxygen sites. O 1s XPS spectra obtained with a charge neutralization system from Gd2Ti2O7(…
Electrodeposition of Zn with Mg was tried using the rotating cylindric cathode in sulfate solutions containing Zn2+, Mg2+ and quaternary ammonium salt at 60°C under galvanostatic conditions. Mg was codeposited with Zn when the Zn deposition was significantly suppressed by the addition of stearyle benzyl ammonium chlor…
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…