Materials Literature
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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…
Abstract. This paper presents the epilithic diatom flora from rivers Vit and Osum. Twenty-eight sampling sites were chosen along the river catchments, from the springs to the inflows (the Danube River). A total of 114 diatom taxa (103 species and 11 varieties) from 36 genera were identified in the epilithon of the stu…
The paper presents a new method of obtaining aluminium oxide composite layers formed by means of hard anodizing in an electrolyte composed of water solution of acids and graphite. The produced layers were subject to tests and their results, such as the influence of process parameters on the properties of composite lay…
Damping capacity (tanδ) of Ti-24 mol%Nb-3 mol%Al (Ti-Nb-Al) shape memory alloy (SMA) with {001}β〈110〉β texture was examined upon cooling from 423 K to 123 K by dynamic mechanical analysis (DMA) in a tensile mode. The {001}β〈110〉β texture was well developed by a cold-rolling with reduction in thickness of 99% followed…
Abstract. One hundred and twenty-two diatom taxa were identified from twenty-nine sites on small rivers and streams in low-inhabited mountain regions in the river Strouma basin (SW Bulgaria). Almost all sites were studied for the first time. Thirty-tree of the taxa were reported for the first time for the Strouma basi…
A series of octakis(alkyloxy)-substituted Zn(II)-phthalocyanines were efficiently incorporated into an organogel made of (1R,2R)-trans-1,2-bis(dodecanoylamino)cyclohexane by means of multiple cooperative non-covalent interactions, and SEM revealed the formation of unique brush-like nanostructures.
The recombination reactions of free radicals formed from the photolysis of a series of polymerisation photoinitiators were studied using time-resolved infrared spectroscopy. All molecules showed Zeeman magnetic field effects (MFEs) in the field range 0-37 mT and those molecules that produced radical pairs with average…
In this communication, we report the self-organization of a perylenedicarboximide to produce materials that exhibit dichroic (direction-dependent) absorption and anisotropic fluorescence emission of visible light.