Materials Literature
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A novel spirobifluorene-bridged allylsilane precursor, which can be easily purified by silica gel chromatography, was prepared by using a new molecular building block for allylsilane sol-gel precursors (MBAS) and successfully converted into a highly fluorescent periodic mesoporous organosilica film.
Highly-transparent Al-doped ZnO (ZAO) porous network thin films are prepared via solvothermal method for the first time. It is found that the morphology of the nanostructures evolved from nanosheets to porous network structures because of the different annealing temperature. The incorporation of Al and the contents of…
A particular form of the Ginzburg-Landau-Devonshire theory of weak first-order transitions is applied to barium titanate and its solid solutions. The theory places emphasis on the crystallographic anisotropy of polarization and its relation to the inter-ferroelectric transitions between proper symmetry phases. It is s…
The Brownian rotation of a nearly spherical gold particle capped with ligands can be observed in the correlation profile of the intensity of the two-photon excited luminescence. Here we report on a multi-parameter study of the luminescence properties, including spectral and polarization analysis of the signal at the s…
Get PDF Email Share Share with Facebook Share on X Post on reddit Share with LinkedIn Add to Mendeley Add to BibSonomy Share with WeChat Get Citation Copy Citation Text P. B. Catrysse and S. Fan, "Transverse Electromagnetic Modes in Aperture Waveguides Containing a Metamaterial with Extreme Anisotropy," in Frontiers i…
We present a unified model for calculation of zirconium alloy fuel cladding rupture during a postulated loss-of-coolant accident in light water reactors. The model treats the Zr alloy solid-to-solid phase transformation kinetics, cladding creep deformation, oxidation, and rupture as functions of temperature and time i…
Two mesogenic homologous series involving ester-azo central linkages with a biphenyl moiety have been synthesized, such as 4′-[(4-n-alkoxyphenyl)diazenyl]biphenyl-4-ol (series I) and 4′-[(4-n-alkoxyphenyl) diazenyl]-4-butoxy phenyl biphenyl-4-carboxylate (series II). Azobiphenyl of series I having a free hydroxyl grou…
To answer the question of whether Pt(II)-based H(2)-evolving catalysts are stable upon exposure to H(2), the behaviours of some platinum(II) complexes in the presence of H(2) (5 × 10(-4) - 1 atm) have been followed spectrophotometrically. The results reveal that some catalysts are highly stable upon exposure to H(2).
Tungsten oxide nanorods were prepared from commercial crystalline WO(3) particles treated with triethylamine under electron beam irradiation in an electron microscope operating at 200 kV. The amine acts as a molecular knife, cleaving the particles under beam irradiation.
The relationship between compressive stress and loading cycles in MgO–C bricks with various carbon contents was investigated at room temperature and high temperature. The relationship between fatigue failure and thermal spalling was investigated by estimating a characteristic material constant, which represents the de…
We investigated the fabrication conditions of a solid electrolyte Ta2O5 thin film suitable for an electrochromic (EC) all-solid-state switchable mirror glass to reduce material and processing costs. The film was deposited by reactive dc magnetron sputtering in a mixture gas of argon and oxygen. The electrochemical pro…
Catalytically active aluminosilicate materials with hierarchical porous structures are produced. A spontaneous self-assembly in aqueous solution starting from component alkoxides resulted in patterned powders without the aid of any templating agent. SEM and N2 adsorption–desorption studies demonstrated regular array o…
Multiwall carbon nanotubes (MWNTs) decorated with CoO nanocrystals were synthesized by in-situ thermal decomposition of Co(acac) 2 in oleyl amine under reflux conditions open in the air. The CoO/MWNTs composite material can be easily converted to metallic Co/MWNTs through annealing under reducing atmosphere (4% <mml:m…
The aim of the present work is concerned with the study of the optical constants of the PMMA/PC blend at different concentrations. The samples are casted as films from the PMMA and PC homopolymers and blend. These polymer systems are evaluated spectrophotometically. The absorption spectra of homopolymers and PMMA/PC b…
Using the first-principles calculations, we investigate the electronic band structure and the quantum transport properties of metallic carbon nanotubes (MCNTs) with B/N pair co-doping. The results about formation energy show that the B/N pair co-doping configuration is a most stable structure. We find that the electro…
9′-Hydroxy-1,3,3-trimethylspiro[indoline-2,3′[3 H ]naphtha[2,1- b ]-1,4oxazine] ( SPO-7OH ) was used in studies of photochromic transformations in polymer matrices. Illumination with UV lamp caused opening the spirostructure of the oxazine with formation of open merocyanine species absorbing at ca. 610 nm. The kinetic…
The electrical properties of Ca Zr 0.9 Y 0.1 O 3 − δ (CZY) were studied as a function of both oxygen partial pressure ( P O 2 ) and water vapor partial pressure ( P H 2 O ) in the temperature range of 500 – 950 ° C and the partial conductivities of protons, holes, and oxygen vacancies were calculated from the defect m…
In boiling water reactors (BWRs), stress corrosion cracking (SCC) has occurred in Alloy 600 and Alloy 182, 132 and 82 weld metals. Most BWRs mitigated SCC by injecting H 2 into the feed water, although the levels vary by ~8X depending on whether they use electrocatalysis and low H2, or only moderate H 2 . Under modera…
In this study, lead free (K0.5Na0.5)(Nb0.94Sb0.04)O3 + 1.2 mol% K4CuNb8O23 + x mol%La2O3 ceramics were prepared by conventional solid-state sintering method. The effect of La2O3 on the crystal structure, dielectric and piezoelectric properties of the ceramics were investigated in order to improve the dielectric and pi…
Cardiovascular implants such as stents or artificial vascular grafts established in clinical application to date are generally designed as long-term implants. An important requirement for the successful application of these devices is the haemocompatibility of their interface to the blood stream, which often is approa…