Materials Literature
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Ultrafine ruthenium-vanadate particles possessing a rutile-type structure, were prepared by a polymerizable-complex method and their electrochemical supercapacitor behavior was studied by cyclic voltammetry in an acidic solution. The solid solution exhibited enhanced supercapacitive properties compared to pure The pre…
Abstract In nanocatalysis, clusters deposited on solid, well-defined surfaces play an important role. For the detection of size effects it is, however, important to prepare samples consisting of deposited clusters of a single size, as their chemical properties change with the exact number of atoms in the cluster. In t…
The performance of electrochemical devices, namely, the potentiostat, has increased considerably lately, and some commercial devices determine impedance on the order of teraohms ( 10 12 Ω ) . At the same time, the protective effectiveness of paint films has also improved markedly, and the paint films exhibit capacitan…
Polarization-multiplexed phase-only diffractive optical elements with subwavelength structures are proposed and fabricated. The differences among the phase modulations result from the differences among the effective indices exhibited in the subwavelength structures with various filling factors and surface profiles, an…
Solid-state NMR techniques were used to study two different types of spider silk from two Australian orb-web spider species, Nephila edulis and Argiope keyserlingi. A comparison of (13)C-T(1) and (1)H-T(1rho) solid-state NMR relaxation data of the Ala Calpha, Ala Cbeta, Gly Calpha, and carbonyl resonances revealed sub…
In this work we show how the design of n-dimensional magnetic compounds (nD with n = 1–3) can strongly benefit from the use crystal engineering techniques, which can give rive to structures of different shapes with different properties. We focus on the networks built by assembling the malonato-bridged tetranuclear cop…
Failure due to fatigue is a very costly problem in oil and gas industry. Many investigators have previously addressed this problem, but its frequency of occurrence is still excessive. Torque and tension can be correctly predicted but computations of fatigue duration are still approximate. Regarding the fatigue failure…
The feasibility and benefits of using an oxygenated fuel for solid oxide fuel cell (SOFC) operation were explored using dimethyl ether (DME). A model for the flow tube chemistry was used to predict DME gas-phase decomposition kinetics and species concentration profiles for temperatures ranging from 550 to 750°C. The p…
An overview of our experiences in the field of immunoliposomal anticancer drugs is provided with respect to choice of ligand, and choice of model system, in order to provide some guidance as to the rational use of this new technology. Liposomes targeted by either peptide or monoclonal antibodies showed significantly h…
Important hard phases are included in the quaternary compositional system Si‐N‐C‐B. This paper reviews ternary amorphous and crystalline phases in the system Si‐N‐C and deliberates on the issue of stability of the binary C 3 N 4 , a hypothetical phase harder than diamond, and instability of nitrides in general. There…
A magnetic entropy change ΔSM due to the itinerant-electron metamagnetic (IEM) transition was estimated to be −23 J/kg K around the Curie temperature for La(Fe0.88Si0.12)13 in the magnetic field change from 0 to 5 T. In order to control the Curie temperature while keeping such a large value of ΔSM, hydrogen absorption…
In order to enhance the adhesion strength of copper metal film to a polyimide (PI) film substrate, a method combining surface microroughness formation and imide ring cleavage was investigated. The results showed that imide rings were cleaved with a KOH treatment while carboxyl and amide groups were formed on the surfa…
An oligomeric supramolecule of 1,5-diaminoanthraquinone (DAAQ), having a crystalline structure by π-π interaction, has been proposed as an active material for electrochemical capacitors. By choosing carefully the electro-oxidation conditions, an electroactive supramolecular DAAQ oligomer was obtained as a film, exhibi…
Complexes of a poly(methacrylic acid-co-methyl methacrylate) network with poly(ethylene glycol) stabilized by hydrogen bonds were prepared. By introducing poly(ethylene glycol), the complexes possessed shape memory effect, due to which a large difference in storage modulus below and above the glass transition temperat…
We present a numerical calculation for the Stokes drag of a particle in a nematic solvent. Due to the radial anchoring of the molecules at the particle surface and a uniform director field at infinity, the particle is accompanied by a hyperbolic point defect which gives rise to the so-called dipole configuration. We w…
High nitrogen stainless steels (HNS) containing about 1 mass% (%) nitrogen without adding Mn were manufactured by pressurized electro-slag remelting method. The chromium nitride precipitation behaviors at the weld heat-affected zone (HAZ) of HNS with different compositions were investigated. We also evaluated the loca…
A cosolvency model to predict the solubility of drugs at several temperatures was derived from the excess free energy model of Williams and Amidon. The solubility of oxolinic acid, an antibacterial drug, was measured in aqueous (water+ethanol) and non-aqueous (ethanol+ethyl acetate) mixtures at several temperatures (2…
Voltage modulated scanning force microscopy in contact mode or piezoresponse scanning force microscopy is now turning into an established technique for imaging ferroelectric domains in ferroelectric thin films. The quantities measured, however, are the amplitude and phase of a locally induced piezoelectric strain, and…
The nature and stability of end-member illite (I), K 0.88±0.01 /O 10 (OH) 2 , a K-deficient mica, has been a subject of much controversy. Evidence for the metastability of “illite” with respect to ideal muscovite (Ms) + pyrophyllite (Py) has been discussed in the literature but conflicting evidence from studies of nat…
Chromate conversion coating (CCC) formation and breakdown was examined using 25 element Al wire electrode arrays. Arrays were interrogated using a multichannel analyzer capable of separately recording currents from each electrode. During CCC formation, electrodes exhibited a 30 s period of intense electrochemical acti…