Materials Literature
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This article is dedicated to reviewing the recent inelastic x-ray scattering (IXS) work on the high-frequency collective dynamics in liquid water. The results obtained with the IXS technique are directly compared with existing ones from inelastic neutron scattering (INS) and molecular dynamics simulation investigation…
This article describes the use of nematic liquid crystals in the Twisted Nematic Liquid Crystal Display (TN-LCD) since the large majority of instruments manufactured currently incorporating a liquid crystal display (LCD) utilise this type of device. The correlation between the electro-optical performance of these devi…
Temperature Rising Elution Fractionation (C. Fonseca I. Harrison). Temperature Rising Elution Fractionation (J. Soares A. Hamielec). Field Flow Fractionation (J. Janca). Static and Dynamic Light Scattering (G. Berry P. Cotts). Neutron Reflection Studies of Polymers (D. Bucknall). Neutron Scattering Studies of Polymer…
The physical and molecular biological bases of the reactions of cells to features of the topography of the substratum or environment on which and in which cells live, both in culture and in the embryo, are discussed. The fact that most, if not all, cells react to micrometric and nanometric topography is stressed. Some…
The aggregation in water of the free bases and the diprotonated forms of p-sulfonatophenyl and phenyl meso-substituted porphyrins [sodium salts of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS4), 5,10,15-tris(4-sulfonatophenyl)-20-phenylporphyrin (TPPS3), 5,10-bis(4-sulfonatophenyl)-15,20-diphenylporphyrin (TP…
Abstract Pillaring is a commonly used procedure to transform a layered crystalline inorganic compound into a material with microporosity and mesoporosity. First, the terms "layered compound, pillaring, pillaring agent and interlayer region" are defined, and then the term pillared layered solid or pillared compound. In…
A chromium(III) binaphthyl Schiff base complex immobilised on modified MCM-41 is an effective catalyst for asymmetric epoxidation of unfunctionalised alkenes and gave significantly higher ee than the free complex.
A new class of magnetomechanical sensor materials, Co-ferrite (CoO/spl middot/Fe/sub 2/O/sub 3/) and metal-bonded (Ag, Ni, Co) Co-ferrite composites, has been investigated. These materials exhibited magnetostriction in excess of 200 ppm and high d/sub 33/ (/spl part//spl lambda///spl part/H)/sub /spl sigma// coefficie…
The crystal structure of ${\mathrm{ZrW}}_{2}{\mathrm{O}}_{8}$ and its variation with pressure and temperature have been investigated by in situ neutron powder diffraction. At room temperature, the cubic \ensuremath{\alpha} phase is stable below 0.21 GPa, where a first-order transition to the orthorhombic \ensuremath{\…
The addition of enough non-adsorbing polymer to a hard-sphere suspension causes the particles to aggregate to form a space-filling gel. The integrity of the gel persists for a finite period of time, and then the space-filling structure collapses suddenly to form a denser sediment. This phenomenon of ‘delayed sedimenta…
In the selective catalytic reduction (SCR) of NO by ammonia, over-exchanged Fe-ZSM-5 prepared by sublimation of FeCl3 into H-ZSM-5, shows superior catalytic activity and stability in a wide temperature range; its activity is promoted by the presence of water in the feed while SO2 is a weak poison at low but a promoter…
A powder sintering method was used to synthesize the intermetallic compounds LaCaMgNi 9 , CaTiMgNi 9 , LaCaMgNi 9 Al 3 , and LaCaMgNi 6 Mn 3 ( PuNi 3 ‐ type ) . The microstructure and primary phases were observed by scanning electron microscopy and X‐ray diffraction. The pressure‐composition isotherms showed that all…
The behavior of the magnetic-field and temperature-dependent heat capacity $C(H,T)$ and the magnetocaloric effect $\ensuremath{\Delta}T(\ensuremath{\Delta}H,T),$ in the vicinity of magnetic phase transitions is discussed. A simple model allowing calculation of the peak value of the magnetocaloric effect is developed f…
The reaction of pyridine-2,6-dimethanol (H2pdm) with [Mn3O(O2CMe)6(py)3][ClO4] gives the 2MnII, 2MnIII title compound 1, which has an S = 8 ground state and displays strong out-of-phase signals in ac susceptibility studies that establish 1 as a new class of single-molecule magnet.
Two simple methods for chemically modifying boron‐doped diamond (BDD) films by oxidative treatment were examined. These treatments have shown promise in imparting selectivity to BDD electrodes, for example, between dopamine and ascorbic acid (AA). BDD surfaces were treated either by oxygen plasma or anodic polarizatio…
An analysis of the conformational properties and hydrogen bonding in the condensed phases of glycerol is reported using the same model as adopted in Part I (Phys. Chem. Chem. Phys., 1999, 1, 871). Structural properties of the liquid and glassy states are analyzed in relation to the molecular backbone conformation of t…
Description Features the most current research from an international body of leading experts on how radiation impacts the microstructure and mechanical properties of a wide range of metals. This comprehensive publication includes 71 peer-reviewed papers organized into the following key areas: • radiation damage mechan…
We have fabricated epitaxial single crystalline cobalt ferrite (CoFe2O4) thin films on CoCr2O4 buffered SrTiO3 and MgAl2O4 substrates. Structural characterization by X-ray diffraction, Rutherford backscattering spectroscopy and atomic force microscopy indicates excellent crystallinity. Magnetic anisotropy measurements…
We describe a new quantitative electrochemical technique for measuring the copper redistribution that occurs during corrosion and pretreatment of high‐strength copper‐containing aluminum alloys. Underpotential deposition (upd) of Pb on Cu was used to assay the surface coverage of Cu. Model experiments using samples of…
Most of the silicone materials used for Hv outdoor insulation are high-consistency, heat cured polydimethylsiloxane (PDMS) elastomers. The unique properties of PDMS that make it suitable for HV applications are reviewed. The surface of these elastomers can be rendered hydrophilic by exposure to discharges. A time and…