Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Electronic states for the configuration of a Si dihydride backbonded to oxygen on the H-covered surface of spherical ${\mathrm{Si}}_{35}{\mathrm{H}}_{36}$ quantum dots (QDs) are calculated self-consistently using the extended H\"uckel-type nonorthogonal tight-binding method. The proposed backbond oxidation accounts fo…
( Fe 3 O 4 ) 1−x –( SiO 2 ) x composite films have been prepared by reactive sputtering iron and SiO2 targets in Ar+O2 mixture at room temperature. Transmission electron microscopy bright field images show that with the increase of SiO2 addition, uniform Fe3O4 grains are well separated by the amorphous SiO2 matrix, fo…
The first comprehensive survey of band-edge features in the ternary group of naturally occurring aluminosilicates (the feldspars) is presented. Synchrotron-based luminescence excitation of KAlSi 3 O 8 , NaAlSi 3 O 8 and CaAl 2 Si 2 O 8 allows the measurement of the evolution of the band-gap across the system, which, a…
The transition metal coordination compound $\mathrm{Fe}(\mathrm{pyrimidine}{)}_{2}{\mathrm{Cl}}_{2}$ crystallizes in a chiral lattice, space group ${I4}_{1}22$ (or ${I4}_{3}22).$ Combined magnetization, M\"ossbauer spectroscopy, and powder neutron diffraction studies reveal that it is a canted antiferromagnet below ${…
A novel complex containing a 3,8-bis[terthiophenyl-(1,10-phenanthroline)] ligand coordinated to [Ru(bpy)(2)] was synthesized and characterized by electrochemical and spectroscopic techniques. The complex was shown to be a suitable starting material for the electrodeposition of functionalized molecular wires between na…
The growth mechanism for a single-crystalline film of InGaO3(ZnO)5 (IGZO) on a (111)-oriented yttria-stabilized-zirconia substrate by reactive solid-phase epitaxy was studied by high-resolution x-ray diffraction, transmission electron microscopy, and atomic force microscopy. We focused on the role of the 2-nm-thick Zn…
A few samples in the system Ba 1− x La x SnO 3 (up to x ⩽ 0.15) have been synthesized via the solid state ceramic route. Powder x-ray diffraction pattern of the samples confirm the formation of a single phase solid solution only in the samples with x up to ⩽0.05. It was found that single phase compositions have a cubi…
X-ray photoemission spectroscopy and optical absorption studies have been carried out on ${\mathrm{Cu}}_{2}\mathrm{O}$ nanoparticles prepared using the activated reactive evaporation technique. A strong shift of the valence band edge (from 0.7 to 1.8 eV) has been observed on reduction of the nanoparticle size from 20…
Quasi-one-dimensional ZnSe nanowires have been synthesized by metalorganic chemical vapor deposition on Si (001) substrates, sputter coated with gold catalyst, at various pressures using diethylzinc and diisopropylselendie. The nanowires appear to be randomly oriented on the substrate and some are slightly bent along…
Abstract Novel epoxy‐clay nanocomposites have been prepared by epoxy and organoclays. Polyoxypropylene triamine (Jeffamine T‐403), primary polyethertriamine (Jeffamine T‐5000) and three types of polyoxypropylene diamine (Jeffamine D‐230, D‐400, D‐2000) with different molecular weight were used to treat Na‐montmorillon…
The aim of this study was to investigate the in vitro and in vivo properties and degradation of (1) self-reinforced (SR) lactide copolymer, P(L/DL)LA 70:30, and (2) SR composites of the same polylactide and bioactive glass 13-93. The following three polymer and polymer-bioactive glass samples were studied: SR-PLA70, S…
In this paper we report a new method of solubilization of polyaniline and polyaniline-Au-nanoparticle composite by encapsulating nanometer-size particles in starch. The solubilization was carried out in the presence of ultrasonic waves. We also report that the encapsulation was completely reversible and the dissolved…
We present periodic density-functional calculations within the generalized gradient approximation (Perdew-Wang 91) on structures and vibrational properties of different vanadium oxide aggregates, namely, bulk ${\mathrm{V}}_{2}{\mathrm{O}}_{5}$ and its (001) surface, as well as thin vanadium oxide films supported by $\…
From first principles, we investigated the adsorption of a hydrogen atom on zigzag single-walled boron nitride nanotubes with and without radial deformation. The adsorption is exothermic. We found that the adsorption energy and site can be modified by the radial deformation. When the deformation is small, H prefers to…
Polycrystalline In2O3:Sn (ITO) films were prepared by direct current magnetron sputtering at substrate temperatures between 150 and 400 °C and at various oxygen admixtures to the sputter gas. X-ray diffraction peaks (position and width) were evaluated with respect to lattice distortion (net increase and fluctuations o…
A study of optical properties of Nd3+ doped oxyfluoride glasses and glass ceramics prepared by three different methods has been carried out. These methods start from NdF3, Nd2O3, or a Nd3+ ion solution as doping agent. The alternative preparation method based on a preliminary dissolution of the Nd3+ ions is proposed i…
We consider the relationship between the temperature at which averaged energy landscape properties change sharply (T(o)) and the breakdown of mean-field treatments of the dynamics of supercooled liquids. First, we show that the solution of the wave vector dependent mode-coupling equations undergoes an ergodic-nonergod…
A layer containing an average of 1.0 monolayer (ML) of adventitious carbon and averages of 1.5 ML and 1.9 ML of hydroxide was determined to be present on the respective O-terminated (0001̄) and Zn-terminated (0001) surfaces of ZnO. A diffuse low-energy electron diffraction pattern was obtained from both surfaces. In s…
Yb3+/Er3+-codoped Na2O–Al2O3–GeO2–PbO–PbF2 glasses that are suitable for use in fiber lasers, amplifiers, and waveguide devices have been fabricated and characterized. The density, refractive indices, optical absorptions, Judd–Ofelt parameters, and spontaneous-transition probabilities of the glasses have been measured…
Oxide multilayers composed of ferromagnetic metallic layers of ${\mathrm{La}}_{0.67}{\mathrm{Sr}}_{0.33}{\mathrm{MnO}}_{3}$ (LSMO) and superconducting cuprate ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7}$ (YBCO) were grown on (1 0 0) ${\mathrm{LaAlO}}_{3}$ substrates by high-pressure dc sputtering. We have inv…