Materials Literature
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The processing of crosslinked polyethylene foam, which has a closed-cell structure, has been investigated. In this study, two types of linear low-density polyethylene (LL) produced by a metallocene catalyst were crosslinked by dicumyl peroxide (DCP). The expansion ratio of the foams decreases with increasing the DCP c…
Interest in field emission and field emission devices has been renewed in the last 5 yr. This increase has been due to work on several new materials systems, which have shown promising field emission (FE) behavior. In turn, this interest gives impetus to the search for new FE sources. In order to move the technology a…
The pulsed electroacoustic (PEA) method already has been used widely to measure the space charge distribution in the pulsed electric field direction of sheet specimens. We have developed a new PEA measurement system which can observe the space charge distribution in three dimensions. Since the PEA system is not damage…
Silver nanowires with sizes of ∼35 nm × 300 nm are synthesized in a lamellar liquid crystalline alignment of oleate vesicles via UV irradiation under ambient conditions. The passivation of oleate amphiphiles on the surface of silver nanoparticles is utilized for the nucleation and directional growth of silver nanowire…
We have investigated the inclusion-dissociation behavior between molecular nanotubes and linear polymers in solutions by measuring the induced circular dichroism of the mixture of the molecular nanotubes, which are composed of α-cyclodextrins linked by three cross-linking bridges, and poly(ethylene glycol) modified wi…
Reaction of zerovalent copper with cobalt(II) acetate and triethanolamine (H3Tea) in DMF solution in air yields the unique pentanuclear mixed-valence complex [CuII2CoIICOIII2(O2CMe)4(H2Tea)2(Tea)2]·2(HO2CMe), 1, which has been characterized by a range of spectroscopic methods and structurally by X-ray crystallography.…
Nanostructured Ni3Al intermetallic (Ni–8.5 Al–7.8 Cr–0.6 Zr–0.02 B; in wt%) with an average grain size of 50 nm was produced using the technique of severe plastic deformation (SPD). Previous studies of Ni3Al in the as-processed state demonstrated non-equilibrium grain boundaries, indicated by a high concentration of e…
Chelate complexation of 4,4,5,5-tetramethyl-2-(6-methyl-2-pyridyl)imidazolin-1-oxyl 3-oxide (NITmepy) and 4,4,5,5-tetramethyl-2-(6-methyl-2-pyridyl)imidazolin-1-oxyl (IMmepy) to cobalt(II) chloride (bromide) or zinc(II) chloride afforded tetrahedral four-co-ordinate (T-4) complexes, [MX2(NITmepy)] and [MX2(IMmepy)] (M…
Synthesis and characterization of the monoruthenium(III)-substituted Dawson polyoxotungstate K7[α2-P2W17O61RuIII(H2O)]·19H2O 2, expected to be an effective homogeneous oxidation catalyst precursor, is described. The reaction products of cis-[RuIICl2(DMSO)4] as the ruthenium source with mono-lacunary Dawson polyoxotung…
A new technique for the fabrication of dense yttria-stabilized zirconia (YSZ) thin-film electrolytes (between 3 and 10 μm) on porous electrode substrates has been used to make planar solid-oxide fuel cells (SOFCs). The YSZ electrolyte is strongly bonded to the Ni-YSZ and (LSM)-YSZ electrode substrates, and the power d…
As determined by X-ray crystallography, tetranuclear metal–metal bound molecular loops [Rh2(DAniF)2]2- (O2CCH2CO2)2 (DAniF = N,N′-di-p-anisylformamidinate) react with 2-N donor linkers to give a tubular structure {[Rh2(DAniF)2]2(O2CCH 2CO2)2(NC5H4CHCHC 5H4N)2}n 1, and a sheet-like structure with interstitial dichlorom…
Films of carbon nanotubes are interesting for technical applications such as cold cathodes in field emission devices. We discuss experiments in which nanotube films are grown by a simple thermal chemical vapour deposition method from hydrocarbon molecules, employing the catalytic activity of deposited iron particles.…
Abstract A novel catalyst, Ni/Ce-ZrO2 exhibits very high catalytic activity and stability in partial oxidation of methane to synthesis gas. It gives 99.6% CH4 conversion at 850 °C and the activity was maintained for 100 h.
Relibase is a database system that has been specially designed to handle protein-ligand data. Included within Relibase is a tool that can be used to systematically analyse protein-ligand interaction patterns specified by three-dimensional (3D) constraints, revealing favorable combinations of interacting functional gro…
π-Conjugated polymer-protected gold nanoparticles of narrow size distribution in stable colloidal form have been prepared via reduction of HAuCl4 by a π-conjugated poly(dithiafulvene) having electron donating properties.
A new micromachined microbolometer array structure is presented that utilizes a self-supporting semiconducting yttrium barium copper oxide (Y-Ba-Cu-O) thin film thermometer. The Y-Ba-Cu-O thermometer is held above the substrate only by the electrode arms without the need of any underlying supporting membrane. This rep…
A commercially available spin-on glass (methylsilsesquioxane, MSQ) was modified by the introduction of porosity. The porosity reduced the effective dielectric constant of the MSQ by the incorporation of air. The pores were created by adding a sacrificial polymer (substituted norbornene polymer) to the silsesquioxane m…
The aim of this paper is to analyze the interaction of chromate ions with surface intermetallics on Al 2024-T3 in NaCl media under open circuit conditions at pH 3 and 6. These interactions are probed by Auger electron (AES), X-ray photoelectron, and energy dispersive X-ray spectroscopies, as well as scanning electron…
The self-assembly reaction of the monomeric nest-shaped cluster [NEt4]2[MoOS3Cu3I3] 1 or twin nest-shaped cluster [NEt4]4[Mo2O2S6Cu 6I6] 2 with the bridging ligand 4,4′-bipyridine (4,4′-bipy) gave a 2D polymeric cluster {[NEt4]- [Mo2O2S6Cu6I3(4,4 ′-bipy)5]·MeOH·H2O} n 3, which exhibits a significant improvement of opt…
Two decanuclear cyclic Cr(III) complexes have been synthesised in high yield by solvothermal techniques: magnetic susceptibility studies reveal ferromagnetic Cr⋯Cr exchange in one, and antiferromagnetic Cr⋯Cr exchange in the other.