Materials Literature
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The electronic conductance of polymer--carbon nanotube multilayered composite films assembled by the spin-spray layer-by-layer method is investigated. Our measurements show that the film conductance per bilayer ${\ensuremath{\sigma}}_{1}$ vanishes for film thickness below a critical value, and above this threshold it…
Homojunction transparent thin-film In2O3 transistors were fabricated at room temperature. Self-assembled In2O3 source–channel–drain structures were grown by pulsed electron beam deposition using a shadow mask with a 300 µm diameter wire as an obstacle placed at ∼100 µm distance from the substrate for growing the chann…
Abstract The effects of zinc oxide addition and sintering parameters on the structure and dielectric properties of barium titanate are observed. Different percentage of ZnO ranging from 0.30 to 1 wt. % is doped in barium titanate. Both the doped and undoped samples are sintered at temperatures ranging from 1250°C to 1…
High-quality planar alignment was achieved in the hexagonal columnar phase of 2,3,6,7,10,11-hexahexyloxytriphenylene by applying an oscillating shear using a piezoelectric actuator. Discotic liquid crystals with thicknesses up to 38 µm could be aligned using this technique, with the molecular columns aligning parallel…
Rapid Single-Stage Separation of Micrometer-Long and High-Purity Semiconducting Carbon Nanotubes by Gel Filtration, Thendie, Boanerges, Miyata, Yasumitsu, Kitaura, Ryo, Miyauchi, Yuhei, Matsuda, Kazunari, Shinohara, Hisanori
In Fe-based superconductors, electron doping is often realized by the substitution of transition-metal atoms for Fe. In order to investigate how the electronic structure of the parent compound is influenced by Zn substitution, which supplies nominally four extra electrons per substituted atom but is expected to induce…
An approach to fabricate Ba0.5Sr0.5TiO3 (BST) films with a preferred orientation on a glass substrate by pulsed laser deposition was developed. To ensure a preferred crystallographic orientation, we utilized a molecularly thin Ca2Nb3O10 perovskite nanosheet as a seed layer and successfully fabricated BST films with a…
Regioregular polythiophenes containing an optically active substituent in the third position of the thiophene ring, head-to-tail poly(3-[2-((S)-1-methyloctyloxy)ethyl]thiophene)s (HT-P(S)MOETs), were synthesized using highly reactive zinc. For comparison, HT-P(R)MOET and achiral HT-P(±)MOET also were synthesized from…
Lithium vanadoxide bismuth borate glasses with composition (30-x)Li 2 O • xV 2 O 5 • 50B 2 O 3 • 20Bi 2 O 3 (x=5, 10, 15) has been prepared with the traditional melt-quenching technique.The density measurements were performed using Archimedes Principal and using density data molar volume was calculated.To determine th…
In situ low-voltage transmission electron microscopy (TEM) was performed to study the evolution of small Pt clusters on suspended graphene. Pt clusters, trapped by the edge of holes, generally take a stable shape of truncated octahedron for sizes ranging from sub-1 to ∼5 nm. The interaction to the graphene dots takes…
Abstract A new phase of silver iodate, β‐AgIO3, was obtained at 2.7 GPa by heating the α‐AgIO3 precursor above 240 °C. β‐AgIO3 is the first iodate obtained at high pressure that stabilizes under normal conditions. The crystal structure was determined by X‐ray powder diffraction and Rietveld refinement. In comparison t…
Motivated by recent reports [L\"uders et al., Phys. Rev. B 80, 241102 (2009)] of room-temperature ferromagnetism in vanadium oxide based superlattices, a single-site dynamical mean-field study of the dependence of the paramagnetic-ferromagnetic phase boundary on superlattice geometry was performed. An examination of v…
Abstract η5‐Monocyclopentadienyliron(II)/ruthenium(II) complexes of the general formula [M(η5‐C5H5)(PP)(L1)][PF6] {M = Fe, PP = dppe; M = Ru, PP = dppe or 2PPh3; L1 = 5‐[3‐(thiophen‐2‐yl)benzo[c]thiophenyl]thiophene‐2‐carbonitrile} have been synthesized and studied to evaluate their molecular quadratic hyperpolarizabi…
In this paper we attempt to answer two questions on graphene from a mechanic's viewpoint: why does this one-atom-thick monolayer have finite bending stiffness to ensure its stability? and what is its wrinkle mechanism? As for the first question, it is found that the repulsive residual internal moment in the bond angle…
A new diacetylinic polymer was prepared through polycondensation of 4,4′-buta-1,3-diyne-1,4-diyldiphenol and dichlorodiphenylsilane. This aromatically substituted siloxane polymer contained thermally cross-linkable diacetylene links in the mainchain. FTIR, Raman, and 13 C NMR analysis confirmed the diethynyl group was…
Performances of double-emulsion techniques (W/O/W and W/O/O) and ionotropic gelation process were compared to achieve encapsulation of gadolinium MRI contrast agents (GdCAs) into biocompatible polymeric nanoparticles (NPs) with high Gd-loadings. The better approach proved to be ionotropic gelation with H[Gd(DOTA)] as…
A plasma-enhanced chemical vapour deposition reactor has been developed to synthesis horizontally aligned carbon nanotubes. The width of the aligning sheath was modelled based on a collisionless, quasi-neutral, Child’s law ion sheath where these estimates were empirically validated by direct Langmuir probe measurement…
By controlling quantum fluctuations within SrTiO 3 with light, we were able to study photovariations in the localized Ti 3d electronic structure exploiting X-ray Raman features to analyze the photoinduced local symmetry breaking, which is the origin of an electric dipole moment. Crystal field photomodifications observ…
Abstract Dolomite (CaMg(CO3)2) constitutes half of the global carbonates. Thus, many calcareous soils have been developing rather from dolomitic rocks than from calcite (CaCO3)‐dominated limestone. We developed a physical fractionation procedure based on three fractionation steps, using sonication with subsequent dens…
The shear response of the -tilt and -tilt (1 1 5)/(1 1 1) asymmetric tilt grain boundaries (GBs) in fcc metals Cu and Al has been studied by atomistic simulation methods with the embedded atom method interatomic potentials and with a bicrystal model. It is found that the structure of the GBs studied can be well descri…