Materials Literature
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A one-pot reaction of Ni II 1, Co II 2, Fe II 3 and Mn II 4 with 2,2′-bipyridine (bipy) and azide in water leads to [M(bipy)(N 3 ) 2 ] n chains where the metal ion is alternatively bridged by double end-on (EO) and end-to-end (EE) azido bridges; theoretical analysis of the variable-temperature magnetic susceptibility…
The first observation of soft X-ray induced excited spin state trapping has been made for [Fe(phen)2(NCS)2] and [Fe(phen)2(NCSe)2] (phen = 1,10-phenanthroline) at ca. 45 K, analogous to light induced excited spin state trapping but at much higher energy. Soft X-ray photochemistry has also been observed in the high- an…
The Au/HY (4 wt.%) system, prepared by autoreduction of [Au(en)2]3+ in inert gas flow at 423 K, has been studied by TEM, 129Xe NMR and diffuse reflectance infrared spectroscopy of adsorbed CO. 80% of the metallic clusters were in the 1–4 nm size range, and the average linear diameter was found to be 2.6 nm. Some large…
Strontium substituted lanthanum manganites La1–xSrxMnO3 (x=0, 0.1, 0.16, 0.2 and 0.3) have been prepared by a solution combustion process using lanthanum nitrate, strontium nitrate and manganese nitrate as oxidizers and oxalyl dihydrazide as fuel at 300 °C in a pre-heated muffle furnace. As-formed lanthanum manganites…
The structural and ground-state electronic properties of the layered orthorhombic molybdenum trioxide (α-MoO 3 ) have been investigated using a periodic boundary condition ab initio Hartree–Fock method. The effect of electron correlation is estimated with a posteriori density functional corrections to the total energy…
A novel high-voltage cathode material, LiNiVO 4 , with an inverse spinel structure, space group, Fdm (O h 7 ) has been synthesized at temperatures as low as 320 °C using the aqueous glycine–nitrate combustion process. The phase purity of the synthesized product has been found to be excellent as confirmed by X-ray diff…
With reference to the traditional use of Cetraria islandica (Iceland moss) for relief of gastric and duodenal ulcer, plant extracts were screened for in vitro activity against Helicobacter pylori. (+)-Protolichesterinic acid, an aliphatic alpha-methylene-gamma-lactone, was identified as an active component. The MIC ra…
Gries has recently reported [Surf. Interface Anal. 24, 38 (1996)] an atomistic model for inelastic electron scattering relevant to Auger electron spectroscopy and x-ray photoelectron spectroscopy and has derived an equation (designated G1) for the estimation of inelastic mean free paths (IMFPs). We present an analysis…
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…