Materials Literature
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This tutorial review highlights some active areas of research into non-oxide sol-gel chemistry. These aim to capture some of the advantages of methods developed mainly with oxides for a new generation of functional materials based on main group and metal nitrides, and semiconducting chalcogenides. Sol-gel processing h…
Menaquinone biosynthesis is initiated by the conversion of chorismate to isochorismate, a reaction that is catalyzed by the menaquinone-specific isochorismate synthase, MenF. The catalytic mechanism of MenF has been probed using a combination of structural and biochemical studies, including the 2.5 A structure of the…
A polyurethane designed to be biodegradable via hydrolysis and enzyme-mediated chain cleavage, has been investigated for its use as a temporary scaffold in tissue-engineering applications. The phase-segregated nature of the polyurethane imparts elastomeric properties that are attractive for soft tissue engineering. Th…
A series of cyanide-bridged coordination networks has been prepared which contain [Ru(phen)(CN)4](2-) anions, Ln(III) cations, and additional oligopyridine ligands (1,10-phenanthroline, 2,2':6',2'''-terpyridine or 2,2'-bipyrimidine) which coordinate to the Ln(III) centres. Five structural types have been identified an…
The relative incidence of structures with Z′ > 1 from synchrotron and neutron studies compared with conventional experiments provides additional evidence in the debate about “crystals on the way”.
Through a new pyrazine-modulated penta-pyridyl-tetraamine ligand, H(4)N(9)-mpz, linear nonachromium(II) complexes with four quadruple metal-metal bonds were successfully obtained, and their structure, magnetic and electrochemistry properties were studied.
Heterododecanuclear Pt(6)Ln(6) (Ln = Nd, Yb) complexes of 4-ethynyl-2,2'-bipyridine (HC[triple bond, length as m-dash]Cbpy), prepared using emissive Pt(Me(3)SiC[triple bond, length as m-dash]Cbpy)(C[triple bond, length as m-dash]Cbpy)(2) as an alkynyl bridging "ligand", afford sensitized near-infrared (NIR) lanthanide…
A new family of random co-poly(ester amides)s (co-PEAs) having reactive pendant functional carboxylic acid groups were synthesized by co-polycondensation of di-p-toluenesulfonic acid salts of bis-(L-alpha-amino acid (L-leucine and/or L-phenylalanine)) alpha,omega-alkylene diesters with active diesters of dicarboxylic…
The reaction and interdiffusion characteristics at the interface of rare-earth doped ceria ( , M = Gd, La) and perovskite-type cathode materials ( , and ) were investigated and their effect on the long-term reliability of solid oxide fuel cell (SOFC) performance are discussed. Secondary phase formation was observed at…
The effect of changing the distance of an ultrasonic horn tip from a stationary platinum disk electrode on limiting current density at various electroanalyte concentrations, ultrasonic frequencies (20 and ), and ultrasonic intensities was studied in an attempt to find the optimum position required for maximum sonoelec…
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We report on the use of EPR spectroscopy and spin trapping technique to detect free radical intermediates formed in the presence of gold nanoparticles. Phosphine- and amine-protected gold nanoparticles were found to initiate air oxidation of organic substrates containing active hydrogen atoms, such as amines and phosp…
This paper addresses the development of robust control designs for high-performance smart material transducers operating in nonlinear and hysteretic regimes. While developed in the context of a magnetostrictive transducer used for high-speed, high-accuracy milling, the resulting model-based control techniques can be d…
(GST) thin films were deposited on and substrates by cyclic metallorganic chemical vapor deposition using , , as Ge, Sb, and Te precursors, respectively, with the help of plasma at temperatures ranging from 180 to . The application of plasma power was essential in obtaining a high growth rate and stoichiometric GST th…
In the present study, natural fibers (jute, kenaf and henequen) reinforced thermoplastic (poly(lactic acid) and polypropylene) and thermosetting (unsaturated polyester) matrix composites were well fabricated by a compression molding technique using all chopped natural fibers of about 10 mm long, respectively. Prior to…
We report the improvement observed in , , and current-voltage curves when hybrid solar cells (HSCs) are transferred from inert conditions to ambient atmosphere. The effect is observed regardless of the semiconductor oxide applied and has been attributed to the reversible incorporation of oxygen from the atmosphere int…
Variations in the microstructure and hardness with solution treating and aging conditions in new α+β titanium alloy Ti–4.5%Al–6%Nb–2%Fe–2%Mo were investigated. Solution treating (ST) temperatures were varied from 1048 to 1173 K with both cooling conditions of water quenching and air cooling. Cooling rate after solutio…
EXAFS (extended X‐ray absorption fine structure) investigations are reported concerning the thermal expansion behaviour of silver in an extended range of temperature from 10 K to about 950 K measured in transmission mode. Both the ratio method and an EXAFS fitting procedure were applied to reveal the temperature depen…
Self-Reinforced Polypropylene (SRPP) offers competitive mechanical properties, higher recyclability and reduced weight compared to glass fibre-reinforced PP, making it attractive to the automotive industry. The technologies required to produce finished automotive components from SRPP have been developed during a UK-ba…
Internal photoemission (IPE) spectroscopy is a powerful technique for investigating electronic properties of inhomogeneous interfaces of hetero‐structures. Two of the most important aspects of IPE measurements involve threshold spectroscopy and photoelectron yield spectroscopy. In the first measurement type, IPE is us…