Materials Literature
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Empirical Ligand Field Molecular Mechanics (LFMM) parameters for CoIII–F and CoIII–CN bonds are developed from Density Functional Theory (DFT) calculations on octahedral [CoF6]3− and [Co(CN)6]3−. In addition to the 5T2g and 1A1g ground states of [CoF6]3− and [Co(CN)6]3− respectively, DFT can also access the low-spin f…
Phenylene–2,5-dimethylpyrazinyl co-oligomers and a dipyridylpyrazine derivative have been synthesised by Suzuki cross-coupling reactions starting from 2,5-dibromo-3,6-dimethylpyrazine. X-Ray crystal structures are reported for two teraryl derivatives, viz. 2,5-bis(2-methoxyphenyl)-3,6-dimethylpyrazine 2 and 2,5-bis(6-…
Dedicated for energy storage, supercapacitors offer new solutions in various applications. This contribution describes briefly main principles of supercapacitors, basics for the design of a supercapacitive tank, and the needed power electronics developments linked to the use of these new components. Typical applicatio…
A large fraction of automotive components made of hardened powder-metallurgy steels are subject to finish-turning before final assembly. Because of a characteristically poor machinability and high surface finish requirements, the conventional P/M turning operations usually require the use of flood-cooled polycrystalli…
Abstract Polypropylene (PP)/poly(ethylene terephthalate) (PET) bicomponent (bico) fibres are successfully melt blown in the Reicofil® meltblown (MB) pilot line commissioned at the Textiles and Nonwovens Development Center (TANDEC), the University of Tennessee, Knoxville. The bico fibers possess a cross‐sectional side‐…
The problem of scattering of electromagnetic plane waves by one-dimensional (1D) periodic dielectric gratings, under the most general condition of oblique incidence (3D incidence), is rigorously solved. A recently developed vectorial modal method for obtaining the modal spectrum of 1D dielectric periodic guiding media…
Abstract A study was made on a isothermal process for the crystallization of potassium sulfate as an alternative to the cooling process. The process employs addition of 1‐propanol to aqueous salt solutions to achieve the “saltingout” of the K 2 SO 4 . This work was carried out using an automated Mettler Toledo model R…
The results of our investigations show that on an untreated flat substrate, the discotic liquid crystals align side-on (or homeotropically) if the sample is slowly cooled from the isotropic phase. If the sample is kept in the glassy or crystalline state for several hours, the alignment inevitably changes to edge-on (p…
In order to understand more clearly the nature of the anodic film formed on aluminum and its alloys, and the mechanism of inhibition of corrosion by chromates, a novel investigation has been made on the anodic film formed on AA1060 using X-ray photoelectron spectroscopy. The goal has been to elucidate whether the inte…
Hydroxyapatite (HAp) crystals were grown on the surface of a cellulose matrix previously modified using titanium isopropoxide (TIPO). This modification provides the appropriate labile chemical groups to grow HAp: the primary hydroxyl of cellulose, the most reactive of the three groups, has not enough reactivity to gro…
The presence of strong acid sites on a metal oxide support results in a reaction of adsorbed NH4+ species in a flow of NO + O2, which is a N2O free pathway in selective catalytic reduction of NO by H2 over supported Pt catalysts.
Abstract Plasticized poly(vinyl chloride)/nitrile butadiene rubber (PVC/NBR) thermoplastic elastomers (TPEs) were dynamically cured in the melt stage with the incorporation of a semi‐efficient curing system using a Brabender Plasticorder at 150 °C and rotor speed of 50 rev min −1 . Sulfur concentration was progressive…
Experimental solubilities are reported at 25.0C for 9-fluorenone dissolved in 40 different organic nonelectrolyte solvents containing ether-, chloro-, hydroxy-, cyano and t -butyl-functional groups. Results of these measurements are used to test the applications and limitations of expressions derived from Mobile Order…
Abstract The biomineralization process was simulated in vitro by the precipitation of calcium carbonate in the presence of two biological additives: bovine serum albumin (BSA) and soluble matrix from the shell of the freshwater snail Biomphalaria glabrata . The crystallization was carried out with the classical ammoni…
Two gelator compounds were used to prepare self-assembled cholesteric liquid crystal (CLC) gels. The presence of a physical network formed by the fibrous aggregates of the gelators in the CLC host creates inhomogeneous domains and generates a highly scattering state. The scattering-based electrooptical switching effec…
A novel two-step approach to the synthesis of nanotubes of a transition metal dichalcogenide is reported. The synthesis combines a sonochemical reaction and an annealing process. MoTe2 nanotubes have been synthesized by calcining amorphous nanoparticles of MoTe2 which were sonochemically synthesized by reacting Te wit…
Barium hexaaluminate (BHA) synthesized by coupling of sol-gel process in reverse microemulsions shows a unique nanowhisker morphology and high surface area, which are retained after calcination at 1300 degrees C.
We have developed high performance anode for medium-temperature solid oxide fuel cells. Mixed conducting samaria-doped ceria (SDC) particles were employed in combination with highly dispersed metal electrocatalysts on their surfaces. A small amount of Ni nanoparticles (6-8 vol %) enhanced the anode performance signifi…
Recently we developed [1] a novel liquid crystal display device employing discotic nematic material. This device exhibits the following improvements over a conventional twisted nematic (TN) display device using a calamitic nematic material. The device (i) is simple to fabricate and (ii) has excellent viewing angle cha…
This paper examines the response of circular and square plates stluck by a rigid mass at the plate centre with a sufficient initial kinetic energy to produce large inelastic deformations. A simpliiicd analysis, which retains finite-deflection effects and assumes that the plates are made of a rigid, perfectly plastic m…