Materials Literature
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Acquiring a pumped storage power generation site utilizing river water recently faces several restrictions due to environmental assessment. On the other hand, there are many sites favorable for constructing a pumped storage power plant utilizing seawater in Japan, which is surrounded by the sea. Seawater pumped storag…
We report investigations of the electronic transport properties carried out by means of the Hall technique for indium–tin–oxide thin films on glass after a variety of surface treatments. We find that oxygen-plasma treatments induce a significant increase in the carrier concentration, and a less significant decrease of…
The effect of a short (10-30 min) thermobaric action (in the 1-5 GPa pressure and 700-1300$^\circ$C temperature range) on the structure, superconductive and mechanical properties of melt-textured-MBa$_2$Cu$_3$O$_{7-δ}$ (M=Y, Nd) or MT-MBCO have been studied. The existence has been established of pressure-temperature--…
Subjecting lamellae-forming poly(styrene- b- isoprene) (SI) diblock copolymers to large-amplitude oscillatory shear (LAOS) offers a route to microstructural alignment. This study examines the spatial uniformity of both isotropic (unaligned) and LAOS-aligned states of an SI diblock copolymer and its blend with homopoly…
A new method to prepare functional grafts on polyethylene is described. In this chemistry, a terminally functionalized poly( tert -butyl acrylate) is first attached to an oxidized polyethylene film. Subsequent hydrolysis of the tert -butyl esters at room temperature then produces a film with some poly(acrylic acid) gr…
Electrically-controlled diffractive gratings are developed on the basis of cholesteric liquid crystal confined between two transparent non-patterned electrodes. The electrodes are coated with alignment layers providing either planar or homeotropic anchoring. For planar alignment the applied electric field causes reori…
The Llano Estacado region of western Texas and adjacent New Mexico has one of the most species-rich charophyte floras known for North America, but upon closer inspection this flora is seen to consist of two, strictly non-overlapping segments, one of 12 taxa, the other of nine. The larger group of species is confined t…
An unusual structure is found for a novel triangulo palladium cluster, stabilized by 2,4,6-triphenylphosphine and triethylphosphane (see figure; large open circles: Pd, small hashed circles: P, small open circles: C). The bonding involving phosphinine bridges between two Pd atoms is based on σ and π orbital interactio…
Acicular ferrite fine particles (CoFe 2 O 4 and NiFe 2 O 4 ) were prepared by using an emulsion liquid membrane (ELM, water-in-oil-in-water (W/O/W) emulsion) system, consisting of Span 83 (sorbitan sesquioleate) as the surfactant and D2EHPA (bis(2-ethylhexyl)phosphoric acid) as the extractant (cation carrier). Co 2+,…
Dramatic differences in magnetic and electrical properties of the isostructural compounds [(DT-TTF)2M(mnt)2] have been investigated. For M = Au, with a diamagnetic anion, the conductivity is activated and two-legged spin-ladder magnetic behaviour is observed. Paramagnetic anions (M = Pt (shown here), Ni) give two magn…
Reversible redox systems for electrochromics with closed-shell colored species are provided by a combination of violene and cyanine structure types according to a general scheme shown in the figure.
A lamellar structure has been found for copper(I) thiolates in the solid state, contrary to earlier reports. On melting, a hexagonal columnar mesophase, in most cases stable within a range of 50–60 °C, is formed (see scheme).
The influence of smectic level ordering on domain morphology has been studied in a series of monodisperse side-chain liquid-crystalline (LC) diblock copolymers. These systems, which consist of a polystyrene- b -methacrylate-based side-chain LC, were investigated using electron microscopy and room temperature X-ray sca…
Reactive micelle was prepared from an end-derivatized block copolymer, acetal−poly(ethylene glycol)−poly( dl -lactic acid)−methacrylate (PEG-PLA). The block copolymer of PEG-PLA formed a micelle with a diameter of approximately 30 nm determined from dynamic light scattering. The glass and Si wafer surfaces coated with…
Alkynyl-linked metallophthalocyanine dyads (see space-filling model) can be readily prepared from appropriately functionalized unsymmetrical ethynyl-phthalocyanines by means of metal-mediated coupling. This method can be advantageously applied to the synthesis of push–pull substituted dimers and heterodimetallic syste…
The effect of photoirradiation on the refractive index of a diarylethene polymer was investigated. Diarylethene polymer was prepared by a radical polymerization using 1-[6‘-(methacryoyloxyethyloxycarbonyl)-2‘-methylbenzo[ b ]thiophen-3‘-yl]-2-(2‘ ‘-methylbenzo[ b ]thiophen-3‘ ‘-yl) hexafluorocyclopentene (BTF6MA), sty…
The linear and cubic dynamic susceptibilities of solid dispersions of nano-sized maghemite particles have been measured for three samples with a volume concentration of magnetic particles ranging from 0.3 % to 17 %, in order to study the effect of dipole-dipole interactions. Significant differences between the dynamic…
By laser ablation we prepared thin films of the colossal magnetoresistive compound La_(1-x)Ca_xMnO_3 with doping levels 0.1
We report the bulk and surface properties of lithium computed within a full potential LCGTO formalism using both density functional theory and the Hartree-Fock approximation. We examine the convergence of computed properties with respect to numerical approximations and also explore the use of finite temperature densit…
A novel tetracarboxylic dianhydride bearing a cycloaliphatic structure, (4a rH,8a cH )-decahydro-1 t,4 t:5 c,8 c -dimethanonaphthalene-2 c,3 c,6 c,7 c -tetracarboxylic 2,3:6,7-dianhydride (DNDA), was synthesized, and its structure was determined using X-ray crystallographic analysis. Polycondensation of DNDA or bicycl…