Materials Literature
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The voltammetric behaviour of electropolymerized nickel macrocyclic complexes in alkaline aqueous solution is described. The nickel-based modified electrodes were prepared by oxidative polymerization of nickel porphyrin, nickel salen and nickel cyclam complexes by repeated potential scans in 0.1 m NaOH solution. All t…
The electrochemical behavior of 55% Al-Zn coated steel sheet, on which a very thin polymeric film (≈ 1 μm) was applied, was studied using electrochemical impedance spectroscopy (EIS). Use of a straightforward electric model to analyze the spectra obtained with different polymer films allowed correlation of the coating…
The filling of carbon nanotubes with metals and metal oxidesvia one- and two-step processes is presented. Both molten media and wet chemistry solution methods have been used to introduce foreign materials into the hollow nanotube cavities. Chemical reactions inside the tubes have been carried out, including the reduct…
Strongly oxygenated LaMnO3+δperovskites, with nominal MnIV contents up to 58%, have been prepared by thermal decomposition of metal citrates followed by annealings either in air or under high oxygen pressure (200 bar). A high-resolution neutron powder diffraction study of four representative samples with 0.11≤δ≤0.29 r…
The near net shape production of homogeneous Ni–Ti intermetallic displaying good shape memory behaviour is attractive, particularly for potential biomaterials applications. This study investigates and characterises equiatomic Ni–Ti shape memory alloy prepared by the compaction and sintering of elemental Ti and Ni powd…
We have developed a high conductivity bilayered ceria/bismuth oxide anolyte/electrolyte that uses the p o 2 gradient to obtain stability at the anolyte‐electrolyte interface and reduced electronic conduction due to the electrolyte region. Results in terms of solid oxide fuel cell (SOFC) performance and stability are p…
Jahn–Teller-active systems continue to yield unforeseen effects in the solid state. The use of conceptually simple potential energy surfaces, an approach developed by several investigators in recent decades, facilitates the understanding of diverse phenomena driven by Jahn–Teller activity. The background of this appro…
Mechanical characterizations of the S 2 layers and the cell corner middle lamella in the axial direction were investigated in spruce wood, A mechanical properties microprobe capable of measuring hardness and Young's modulus on a spatially resolved basis similar to that of an electron beam microprobe was used. Hardness…
IN THIS WORK, displacement and lattice rotation are regarded as independent degrees of freedom. They are connected only on the constitutive level and by the balance equations. The description of plastic deformation is based on the slip theory. Elastic lattice curvature and torsion are associated with couple-stresses.…
This paper presents a new frequency domain arc furnace model for iterative harmonic analysis by means of a Newton method. Powerful analytical expressions for harmonic currents and their derivatives are obtained under balanced conditions of the power system. The model offers a three-phase configuration where there is n…
The reaction between MnCl 2 ·4H 2 O, Hhmp (Hhmp = 2-hydroxymethylpyridine) and NEt 4 MnO 4 in MeCN gives NEt 4 [Mn 7 (OH) 3 Cl 3 (hmp) 9 ]Cl[MnCl 4 ] 1; the 4 Mn II , 3 Mn III cation comprises a Mn 6 hexagon containing a central Mn ion, and it possesses a S ≥ 10 ground state.
In this paper we present the technology of electroless Cu deposition for ultra-large-scale integration. The technology has several components: the solution chemistry, the operation conditions, the seeding, the equipment and the process integration. Sodium-free solution was used and optimized to achieve a deposition ra…
The crystal structures of [Cu(phen) 2 Cl][BF 4 ]·0.5H 2 O 1 (phen = 1,10-phenanthroline), [Cu(phen) 2 Cl][PF 6 ] 2, [Cu(phen) 2 Cl][CF 3 SO 3 ]·H 2 O 3 and [Cu(phen) 2 Cl][BPh 4 ] 4 have been determined by X-ray crystallography. Three of the complexes, 1–3, involve a CuN 4 Cl chromophore with a square based pyramidal…
Specially designed spectroelectrochemical cells were used to record UV−vis absorption and magnetic circular dichroism (MCD) spectral data of the phthalocyanine ring-reduced dianion, [ZnPc(−4)] 2 -, in situ at room temperature. [ZnPc(−4)] 2 - was generated at cryogenic temperatures through photoreduction of a vitrified…
An overview of electron backscatter diffraction is presented in which experimental procedures are reviewed together with a basic theoretical description of the mechanism of pattern generation. Manual and automated indexing procedures are described. The new technique of orientation imaging microscopy is presented, with…
A new series of iron(ii) spin-crossover materials of formula [Fe(NH2trz)3 ]X2xH2O [X=1-naphthalene sulfonate (1ns), 2-naphthalene sulfonate (2ns), 4-hydroxy-1-naphthalene sulfonate (4OH-1ns), 4-amino-1-naphthalene sulfonate (4NH2-1ns) and 6-hydroxy-2-naphthalene sulfonate (6OH-2ns)] are reported. The structure of thes…
In order to obtain small, polymer-stabilized particulate carriers for organic iodine to serve as a contrast agent for X-ray computed tomography (CT) an attempt was made to design a carrier based on polymeric micelles. Here we describe the synthesis of an iodine-containing amphiphilic block-copolymer which can micelliz…
Titanium silsesquioxane complexes [Ti(L)(R7Si7O12)], possessing tripodal geometry, represent models for heterogeneous titanosilicate catalysts; the new complexes are exceptionally active and selective catalysts for liquid phase alkene epoxidation reactions.
Outline of optical fibre amplifiers rare earth ions in glasses and transitions for optical amplification fibre materials and fabrications amplification characteristics on fibre amplifiers.
A humidity-sensitive composite film has been synthesized that consists of soluble polyaniline (PAn) and poly(vinyl alcohol) (PVA). PAn gave a percolation threshold where the electrical conductivity rose sharply at a volume fraction of 0.1%. This value is very small compared with that (about 5 vol%) reported in general…