Materials Literature
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Aerosol assisted chemical vapour deposition of polyoxotungstate precursors [n-Bu4N]2[W6O19] and [n-Bu4N]4H3[PW11O39] produces films of WO(3 - x) and WO3 on glass substrates; the WO3 films show significant photocatalytic decomposition of a test organic pollutant--stearic acid--when irradiated with either 254 or 365 nm…
The aim of this study was to characterize the mechanical and self-expansion properties of braided bioabsorbable stents. In total four different stents were manufactured from PLLA fibres using a braiding technique. The changes in radial pressure stiffness and diameter recovery of the stents were determined initially, a…
We report the synthesis of high-quality double-walled carbon nanotubes without defects by catalytic decomposition of alcohol over an Fe-Mo/Al2O3 catalyst; the synthesized DWNTs have outer diameters in the range of 1.52-3.54 nm and an average interlayer distance of 0.38 nm between graphene layers.
One-dimensional free energy local minimizers are viewed as three-dimensional lamellar-type critical points in a box. To determine whether they model the lamellar phase of diblock copolymers in the strong segregation region, we analyze their spectra. We obtain the asymptotic expansions of their eigenvalues and eigenfun…
Numerous macromolecular MRI contrast agents prepared employing relatively simple chemistry may be readily available that can provide sufficient enhancement for multiple applications. These agents operate using a ~100-fold lower concentration of gadolinium ions in comparison to the necessary concentration of iodine emp…
The syntheses, structures and magnetic properties are reported of new iron(III) complexes with Fe6 wheel and Fe8 cage topologies, and containing tripodal ligands. The compound [Fe8O3(O2CPh)9(tea)(teaH)3]·MeCN (1·MeCN), where teaH3 is triethanolamine, was obtained from the reaction of two equivalents of teaH3 with [Fe3…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Wanchai Lerdwijitjarud, Ronald G. Larson, Anuvat Sirivat, Michael J. Solomon; Influence of weak e…
In order to prepare boron nitride fibers displaying improved mechanical properties, different polymers have been prepared from 2-[(CH3)2N]-4,6-(CH3HN)2B3N3H3 (1) by varying thermolysis conditions. Analytical data showed that the resulting polyborazines 2, 3, 4 and 5 present polymerisation degrees included between 0.7…
1. FUNDAMENTALS.Fundamentals of Corrosion (D. Landolt & G. Frankel).Thermodynamics of Electrolytic Corrosion (D. Landolt & G. Frankel).Kinetics of Electrolytic Corrosion Reactions (D. Landolt & G. Frankel).Transport Phenomena in Electrolytic Corrosion (D. Landolt & G. Frankel).2. HOMOGENEOUS CORROSION OF METALLIC MATE…
Changes in the microstructure and dielectric properties with the variation of the donor/acceptor ratio in BaTiO 3 ceramics were investigated. In donor‐rich specimens, a liquid that appeared during sintering did not penetrate into grain boundaries. However, in the acceptor‐rich specimens, the grains were separated by a…
The emergence of uncooled infrared detectors has opened new <i></i>opportunities for IR imaging both for military and civil applications. Infrared imaging sensors that operate without cryogenic cooling have the potential to provide the military or civilian users with infrared vision capabilities packaged in a camera o…
Bi nanowire arrays have been successfully synthesized using potentiostatic electrochemical deposition into the channels of an anodic alumina membrane (AAM). The morphology and structure of Bi nanowires have been characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolu…
A solar light induced photocatalytic cycle is described for the selective oxidation of benzyl alcohol in presence of a polyoxometalate catalyst and under very simple reaction conditions.
The use of di-2-pyridyl ketone ((py)2CO)/3,5-di-tert-butylcatechol (H2dbcat) “blend” in iron(III) chemistry has yielded a cationic tetranuclear cluster and an anionic trinuclear complex. Both complexes were prepared under anaerobic conditions. The Fe(ClO4)3·6H2O–(py)2CO–H2dbcat–NEt3 (1 ∶ 1 ∶ 1 ∶ 2) reaction system in…
A series of tetradentate Schiff base ligands N,N′-bis[5-(4-n-alkoxy)phenylazosalicylidene]alkyldiamine(n-alkoxy = butyloxy, octyloxy) homologues based on 1,2 diaminoethane and 1,3 diaminopropane have been synthesized and characterized by IR, NMR and mass spectroscopy. For all the ligands the nickel(II), copper(II) and…
Although an adhesive joint can distribute the load over a larger area than a mechanical joint, requires no holes, adds very little weight to the structure and has superior fatigue resistance, but it not only requires a careful surface preparation of the adherends but also is affected by service environments. In this p…
Reactions of mononuclear oxohalomolybdates(V) with squaric acid (3,4-dihydroxycyclobut-3-ene-1,2-dione) afforded two types of {Mo2O4}2+ containing species with the squarato ligand engaged in a μ2-1,2-bis(monodentate) binding mode. In the presence of pyridine (Py) or 3,5-lutidine (3,5-Lut) neutral, dinuclear complexes…
This textbook for undergraduates and graduates begins with the basic topic of energy band theory and moves on to cover more advanced concepts and devices.Often introducing ideas with everyday comparisons, concepts are explained in full and described mathematically.The text includes problems, many of which make use of…
High Brunauer-Emmett-Teller method (BET) surface area and mesoporous activated carbons (ACs) were prepared by carbonization followed by activation of vinylidene chloride copolymer containing yttrium acetylacetonate Their performance as electrodes for electric double-layer capacitors (EDLCs) in nonaqueous electrolyte s…
The systematic investigation of steric and electronic effects on the formation of lanthanide complexes with the tridentate N,N,N′,N′-tetraalkylpyridine-2,6-dicarboxamide ONO ligands (alkyl = ethyl: L5, isopropyl: L6 and benzyl: L7) shows a reduced affinity with increasing steric demand in the order L5 < L6 < L7. [Ln(L…