Materials Literature
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Charge transport at conjugated polymer interfaces with metals and inorganic semiconductors is reviewed. Experiments on the equilibrium properties and DC current-voltage behavior of four specific classes of interfaces-metal-doped conjugated polymer, inorganic semiconductor-doped conjugated polymer, metal-intrinsic conj…
Boron in diamond traps hydrogen forming passive ${\mathrm{B}}_{s}$-H pairs. Boron trapping two deuterium atoms has been speculated as forming a shallow donor (0.23--0.34 eV below the conduction band). We present the results of first-principles calculations of boron complexes with 2--4 hydrogen atoms. The binding energ…
Direct measurements of longitudinal (d33) and transverse (d31) piezoelectric coefficients have been made on cuboid samples of [001]C-poled 0.955Pb[Zn1/3Nb2/3]O3-0.045PbTiO3 (PZN-4.5PT) and 0.68Pb[Mg1/3Nb2/3]O3-0.32PbTiO3 (PMN-32PT) single crystals. The measurements were made in a Berlincourt-type press over a wide ran…
Co doped rutile thin films were fabricated on α-Al2O3 (10-12) substrates by laser molecular beam epitaxy. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy indicated that the rutile thin films are (101) oriented and have smooth surfaces with no impurity phases. Co K-edge x-ray absor…
In this investigation, the mechanism of abnormal grain growth in Fe-3%Si steel was based on the microstructure evolution at the growth front of grains undergoing the abnormal growth. The most striking feature in the growth of abnormal grains was the penetration along the grain boundary of neighboring grains. This is e…
A study of N doping using N2O and NO sources on ZnO, which may prove important for the N doping of oxide materials, was performed by investigating the doping processes of N atoms by each source together with the various properties for the grown N doped ZnO films. N2O was employed as the radio-frequency (rf) plasma sou…
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…