Materials Literature
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In methanol, [n-Bu4N][MoCp*O3] reacted with [n-Bu4N]2[Mo4O10(OMe)4Cl2] to yield [n-Bu4N][Mo6Cp*O18] in reasonable yield, thus opening a new route in the synthesis of organometallic derivatives of polyoxometalates. The crystal and molecular structure of [n-Bu4N][Mo6Cp*O18]·Me2CO has been determined by single-crystal X-…
In this paper, recent works on impact perforation of fiber composite laminates struck by foreign objects traveling at high speed have been reviewd. The review focuses on two major subjects in impact perforation research, i.e., an assessment of perforation characteristics and an understanding of the perforation process…
ZnO thin films were deposited by spraying of zinc acetate solution onto heated glass substrates at 670 K. Highly textured in the (002) direction undoped ZnO films, exhibiting exciton emission bands in photoluminescence spectra at 8 K, were grown. The initial stages of the thin film growth and effect of doping with In,…
A new type of HDDR (Hydrogenation, Disproportionation, Desorption, Recombination) processing route, in which alloys are heated up under a low pressure of H/sub 2/ for the disproportionation stage, was found to be an effective way of obtaining high remanence Nd-Fe-B ternary powders, with no large decrease in coercivity…
Due to structural limitation, the currently proposed apparatus based on a single sheet tester (SST) cannot measure magnetic properties along arbitrary directions (so-called 2-D magnetic properties) of silicon steel at high flux densities. In this paper, significant improvements are carried out on magnetizing windings…
A new series of luminescent dinuclear six-coordinate cadmium(II) diimine complexes with bridging chalcogenolate ligands has been synthesized and characterized, and shown to exhibit interesting photophysical and electrochemical properties. The X-ray crystal structures of [(phen)2Cd(µ-SC6H4CH3-p)]2(PF6)2 (11) and [(phen…
Analysis of the dynamic structure factor, , measured by means of inelastic neutron and x-ray scattering, for vibrations around the boson peak in glasses, demonstrates the presence of coherent- and random-phase contributions. It is found that systems with strong boson peaks have larger random-phase contributions to . T…
The granular perovskites , with the concentration x from 0.05 to 0.5, have been fabricated by the sol-gel method. The concentration-dependent transport properties in the granular perovskites have been investigated. Spin-dependent interfacial tunnelling and the corresponding tunnel-type magnetoresistance have been obse…
Silver sulfide particles embedded in thin coatings of transparent and homogeneous silica glass are promising materials for the development of optical devices. The optical properties are strongly dependent on the elemental composition and morphology of the coatings as well as on the size distribution of the nanocluster…
In Methanobacterium thermoautotrophicum, the fmdECB operon encoding the molybdenum formyl-methanofuran dehydrogenase is directly preceded by an open reading frame tfx predicted to encode a DNA binding protein. The 16.1 kDa protein has an N-terminal basic domain with a helix-turn-helix motif for DNA binding and a C-ter…
We report, for the first time, epitaxial growth of high-quality ZnS films on sapphire and silicon substrates, using pulsed laser deposition. X-ray diffraction results show that at all growth temperatures from 200 °C to 680 °C, epitaxial wurtzite (002) ZnS films have been successfully grown on (10 2) sapphire and (001)…
The relative stabilities of the following phases: graphite-C3N4, α-C3N4, β-C3N4, cubic-C3N4 and pseudo-cubic-C3N4 have been determined using density functional theory in its local density approximation. In particular three calculational methods were imployed: augmented spherical wave, linear muffin-tin orbitals and fu…
The dielectric relaxation times characterizing the rotations around the molecular short axis in the nematic (τ‖) and isotropic (τis) phases of several liquid crystalline cyanophenyl compounds are re-analysed with the aim of obtaining the retardation factor g‖ and then the nematic potential q and the order parameter S.…
Porous silica film with a median pore size of 5.5 nm was exposed to an oxygen plasma afterglow. The exposure resulted in a removal of hydrophobic organic groups from the silica surface, leading to a continuous increase in the refractive index and a decrease in film thickness. The exposure to the thermal oxide did not…
The Shubnikov-de Haas (SdH) effect in Sb 2- x Ti x Te 3 single crystals was investigated as a function of Ti content for 0< x <0.02 at T = 4.2 K in high magnetic fields up to 40 T applied along the c 3 -axis. We found that by doping Ti into Sb 2 Te 3 , the cross-section of the six-ellipsoidal Fermi surfaces of the upp…
Using the biomimetic method, we formed a hydroxyapatite (HAp) layer on/in certain types of nonionic hydrogels that contain hydroxyl groups. The hydrogels used were poly(vinyl alcohol) (PVA), poly(2-hydroxyethyl methacrylate) (PHEMA), poly(glucosyloxyethyl methacrylate) (PGEMA), and agarose. Under an optical microscope…
The [VOCl4]2–/AgOAc reaction system in MeCN gives [V5O9Cl(OAc)4]2–, [V9O19(OAc)5]3– and [V15O36]5– for reagent ratios of 1∶2, 1∶3 and 1∶4, respectively: the V5 and V9 cores are fragments of the V15 core, suggesting the V5 and V9 units are carboxylate-stabilised intermediates in the assembly of the V15 polyoxovanadate.
Abstract Effectively luminescent organic polymers were successfully fabricated by incorporating deuterated hexafluoroacetylacetonato Nd(III) or Eu(III) complex and DMSO-d6 in polyalkylmethacrylate matrices with low percentage of H atoms.
The localized corrosion properties of and , were investigated in the amorphous, high strength partially nanocrystalline, and fully crystalline states. The critical pitting potentials and pit growth behaviors of amorphous and nanocrystalline alloys were improved compared to high purity, polycrystalline in solution. Tra…
Finite element modeling treats magnetization processes within the framework of micromagnetic theory, taking into account the complex microstructure of a magnet. The numerical integration of the Gilbert equation of motion provides the time evolution of the magnetization and thus shows how reversed domains nucleate and…