Materials Literature
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The oxidation of aliphatic primary amines, n-propylamine (PA) and -butylamine (BA), by chloramine-B (CAB) and chloramine-T (CAT) in aqueous alkaline medium has been kinetically studied at 318 K. The reaction follows the experimental rate law: rate k′ [oxidant] [amine] 0 [OH − ] x , where oxidant is CAT or CAB and x is…
We present a study of palladium-hydrogen system by the linearized augmented plane-wave (LAPW) and Naval Research Laboratory (NRL) tight-binding (TB) methods. We constructed a TB Hamiltonian by fitting to first-principles LAPW data for the electronic energies of a large range of palladium and palladium hydride structur…
Typical silicon nanocrystal light emitting devices (LEDs) operate under direct current (DC) biasing conditions that require high electric fields or high current densities. The electroluminescence (EL) under these conditions relies on impact excitation that can be damaging to the material. In this work, we present bipo…
A novel stages compensation and control strategy suitable for a series power-quality regulator (SPQR) based on a voltage-source converter (VSC) inverter is proposed in which steady operation stage, overrun operation stage, and recovery operation stage are included. The presag voltage compensation, minimum energy compe…
Abstract In this paper, we report on PbMoO4 crystals grown from melts of controlled stoichiometric variations under different ambient conditions. It is observed that PbMoO4 crystals of different shades not only differ in their impurity contents but their stoichiometries with regard to both cationic and anionic composi…
Abstract In this study, the effects of postannealing on ZnO and Al2O3 films grown for a thin‐film transistor (TFT) by the atomic layer deposition (ALD) method were examined using transmission electron microscopy (TEM) and energy‐dispersion spectroscopy. Samples were subjected to rapid thermal annealing for 30 s at 610…
The high-frequency transconductance and current noise of top-gated single carbon nanotube transistors have been measured and used to investigate hot electron effects in one-dimensional transistors. Results are in good agreement with a theory of one-dimensional nanotransistor. In particular the prediction of a large tr…
Abstract Explicit solvent molecular dynamics simulations of meso‐tetra[4‐sulfonatophenyl] porphyrin (TPPS4−) in water were performed. The relation solute–solvent was examined through the radial distribution function g(r) of water molecules around different groups of the solute. The outcomes of the simulations show tha…
Abstract The effect of oxygen vacancies on ferromagnetism (FM) in Zn1−xMnxO thin films grown by radio frequency (RF) sputtering has been investigated. The grown films at different oxygen pressures have been characterized by X‐ray diffraction (XRD), Hall effect, photoluminescence (PL) and vibrating sample magnetometry…
Poly(1-methylpyrrol-2-yl)squaraine (PMPS) particles have been characterised using SEM. The PMPS particles were used as templates to prepare bare silica and iron–silica hollow spheres, which were characterised using TEM and SEM. The PMPS particles and the hollow spheres are not uniformly sized and are agglomerated. The…
A new oxamido-bridged tetracopper(II) complex, [Cu4(oxbe)2(bpy)2](ClO4)2 · 2H2O, where H3oxbe and bpy stand for N-benzoato-N′-(2-aminoethyl)oxamide and 2,2′-bipyridine, has been synthesized and characterized by elemental analyses, molar conductivity, infrared and electronic spectra, and single-crystal X-ray diffractio…
We propose a structureless method for focusing surface plasmon polaritons (SPPs) on a flat metal film under illumination of radially polarized cogwheel-like structured light beams. Without metal structures, the locally induced SPPs can further be propagated following the predefined patterns to form symmetric focal spo…
Temperature-dependent photoluminescence (PL) measurements have been performed on high-quality InAlN layers lattice-matched (LM) to GaN with different thicknesses. It is found that the PL is consisted of two components denoted as IH (high-energy side) and IL (low-energy side), respectively. IH is attributed to exciton…
Fractality of the arc trail in magnetized plasma is investigated on the basis of an experimental observation and numerical simulation. When the trail of a unipolar arc on a tungsten electrode is analyzed in detail, the global fractal dimension is observed to reach unity, while the local dimension is considerably high,…
Hair cuticle is the first protection shield of hair against external aggressions such as daily combing or brushing that induce friction, mechanical stress leading to ageing process. The identification of alterations of the hair surface induced by shaking process of various hair fibres, such as virgin and chemically tr…
Prickly silver: Ag nanothorn assemblies with large-scale (111) faces gradually grow from a flocked nucleus into sharp nanothorn structures (see graphic). Large-scale Ag (111) faces are obtained because of its low surface energy.
Elastic properties of the cage compound CeRu 2 Al 10 have been investigated by means of ultrasonic measurement. We found a sudden elastic hardening in all moduli below T 0 =27.3 K at which a novel phase transition occurs, and an abrupt elastic softening was observed in longitudinal moduli at T 0 . The magnitude of har…
A review on the analysis based on our recent theoretical results on the site specific activation of CO, N2 and NO on corrugated Ru surface is presented. We discuss the issues such as what should be the configuration of the active site for the optimum dissociation of the diatomic molecules?, How is the barrier dependen…
We used molecular dynamics with embedded-atom method to model the growth of a Pd thin film deposited on Au(100) for a system with approximately $100\text{ }000$ atoms. We showed that the Pd film grew under stress on the Au substrate with face-centered-cubic structure. After the deposition of 9 monolayers, the stress s…
Poisoning of platinum catalysts by sulphur compounds is a significant problem that prevents their application in untreated gas streams. We introduce a novel concept to circumvent the poisoning problem by encapsulating individual platinum nano-particles with silica layers that act as selective membranes. Greatly enhanc…