Materials Literature
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The oxygen permeation through a wafer of Y2SiO5 has been measured in the temperature range from 1973 to 2033 K and the oxygen permeability constant of Y2SiO5 has been determined, because Y2SiO5 is favorable for the outer layer of our proposed oxidation protection double layered coating on C/C composites. We presented…
The decrease of the magnetic response under irradiation at very low temperature was interpreted as a new evidence of synergy between magnetic interaction and spin transition in an iron(II) binuclear SC compound.
Copper–polypyrrole (Cu–PPy) composites have been synthesised following an all-electrochemical procedure comprising the deposition of a thin PPy film and the subsequent pulsed potentiostatic deposition of copper from a CuCl2 solution. Surface and bulk characterisation of the specimens has been carried out using X-ray P…
Electrochemical Hydrogen Pump Using SrCeO3-Based Proton Conductor: Effect of Water Vapor at the Cathode on the Pumping Capacity, Matsumoto, Hiroshige, Hamajima, Seiji, Yajima, Tamotsu, Iwahara, Hiroyasu
Nickel free high nitrogen austenitic stainless steel design calls for proper choice of alloying constituents that enhances nitrogen solubility and retention of the same after alloying. The nitrogen alloyed should be adequate enough to give a single phase austenitic matrix along with other alloying elemental constituen…
Amorphous tungsten oxide/ruthenium oxide composites have been synthesized by precipitating amorphous on amorphous and under various pH conditions. The samples have been characterized by X-ray powder diffraction, elemental analysis using wavelength dispersive spectroscopy (WDS), thermogravimetric analysis, and surface…
We have developed a new methodology for preparing films and paints suitable for use as biocatalytic coatings. The hydrolytic enzymes pronase and alpha-chymotrypsin were immobilized by either sol-gel entrapment or by covalent attachment into a polydimethylsiloxane (PDMS) matrix and cast into thin films or incorporated…
Electrochemical copolymerization of diphenylamine (DPA) with anthranilic acid (AA) was performed in aqueous 4 M H 2 SO 4 solution for different feed ratios of DPA using cyclic voltammetry. The copolymer film was grown for different numbers of cycles, C n , and feed ratios of DPA. Electrochemical homopolymerization of…
A 150-200°C atomic layer deposition (ALD) process has been developed for advanced gap and tunnel junction applications for thin films heads. The primary advantage of the ALD process is the near 100% step coverage with properties that are uniform along the sidewall. This process provides smooth ( R a ≃ 2 Å ) , pure (im…
Cluster formation can be induced in situ in SWNTs filled with ZrCl4 by electron beam irradiation of SWNT/ZrCl4 composites within a field emission gun transmission electron microscope (FEGTEM); the process represents a possible route to the synthesis of 1D-quantum dot arrays formed by related materials.
Decavanadate anions with various degrees of protonation were crystallized with tetraalkylammonium cations, R4N+, where R represents CH3, C2H5, n-C3H7, or n-C4H9. Structure analyses of seven such crystals reveal that these cations allow decavanadate anions to assemble with each other forming various kinds of hydrogen-b…
To date, one approach to tissue engineering has been to develop in vitro conditions to ultimately fabricate functional cardiovascular structures prior to final implantation. In our current experiment, we developed a new pulsatile flow system that provides biochemical and biomechanical signals to regulate autologous pa…
With some exceptions, surface chemistry had little effect on platelet and leukocyte activation, and cell deposition, by scanning electron microscopy after blood exposure and clotting times among a group of 12 unmodified and plasma modified tubings. All materials activated platelets and leukocytes to detectable levels,…
The oxo-centred trinuclear complex [Fe3O(O2CPh)6(py)3]ClO4·py and its fully deuteriated analogue have been synthesized. X-Ray crystallography at T = 233 K shows that the complex has threefold symmetry, space group P63/m. Incoherent inelastic neutron scattering spectra at T = 1.5 K however show the presence of two ineq…
The effects of small amounts of achiral photochromic dopants, 4,4′-di-n-alkylazobenzenes, with various lengths of substituted alkyl chain (CnH2n + 1 ∶ n = 4, 7, 11, 12, 13, 14, 15, 16) on the helical pitch of a cholesteric liquid crystal (CLC) with ca. 1000 molecular weight were investigated in order to utilise the ch…
The surface of a polyhedral oligomeric silsesquioxane-polyurethane copolymer has been characterized in situ using X-ray photoelectron spectroscopy before and after exposure to incremental fluences of oxygen atoms produced by a hyperthermal oxygen atom source. The data indicate that the atomic oxygen initially attacks…
A newly developed novel rapid densification process named Spark Plasma Sintering (SPS) has been successfuly applied to compact silicon nitride based ceramics. In this process the precursor powders are pressed uniaxially in a carbon die, and an on–off pulsed DC voltage is applied simultaneously. The current passes thro…
Polyaniline (PANi) and poly(1,5-diaminonaphthalene) (PDAN) films can be deposited on iron from aqueous sulfuric acid. The films exhibit electroactive properties similar to those of PANi and PDAN generated on platinum. Electrosynthesis performed in the presence of both monomers leads to a composite film which presents…
Four new complexes of formula [MCl2(IM2py)2], where M = Mn(II), Co(II), Ni(II) or Zn(II); IM2py = 4,4,5,5-tetramethyl-2-(2-pyridyl)-imidazolin-1-oxyl, have been prepared, and examined from viewpoints of the crystal structures, magnetic and spectroscopic properties. All the complexes crystallize in an isomorphous space…
The design, atomic characterization, performance, and relevance to clean technology of two distinct categories of new nanocatalysts are described and interpreted. Exceptional molecular selectivity and high activity are exhibited by these catalysts. The first category consists of extended, crystallographically ordered…