Materials Literature
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The chemical composition of ikunolite and the distribution of Se among various sulfides and sulfosalts at Redziny, in the metamorphic cover of the Variscan Karkonosze pluton, in Lower Silesia, Poland, have been documented by electron-microprobe analysis. At Redziny, selenium becomes concentrated at the lower-temperatu…
Au nanorods have been successfully synthesized at 90C by using hexadecyltrimethylammonium bromide (CTAB) and benzyldimethylammoniumchloride hydrate (BDAC) co-surfactant. At 90C, the reaction time was less than 10 s, and the longitudinal surface plasmon absorption band could vary between 680 and 770 nm by adjusting the…
The analytic mean field potential approach is applied to -, -, and -Si 3 N 4 . The analytic expressions for the Helmholtz free energy, internal energy, and equation of state were derived. The formalism for the case of the Morse potential is used in this work. Its six potential parameters are determined through fitting…
Hydrophobie und Porengröße: Bei der Bildung von nanostrukturierten TiO2-Filmen wirken dendritische amphiphile Kern-Doppelschale-Makromoleküle mit einer hydrophoben Polystyrol(PS)-Innenschale und einer hydrophilen Polyacrylsäure(PA)-Außenschale als Template (siehe Bild). Die Porengröße der Filme lässt sich einstellen,…
Selected organic and inorganic nitrogen sources were evaluated for growth of Pseudomonas putida PGA1 and its production of medium-chain-length poly-(3-hydroxyalkanoates) (PHA MCL ). The effect of these nitrogen sources on the cells growth, PHA MCL yield, monomer composition and molecular weight when this bacterium was…
A new mineral species, niveolanite, the first natural carbonate of beryllium, was found in the Poudrette pegmatite, Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada. It is associated with albite, aegirine, natrolite, gonnardite, siderite, petersenite-(Ce), franconite, dawsonite, analcime, quartz, eudidymite, catap…
In the tight-binding approximation, we take into account the next-nearest-neighbor hopping in graphene that leads to nonrelativistic-like corrections in its low energy spectrum. The electronic density of states in a magnetic field is found and the fan diagram is plotted, which interpolates between those for the relati…
The propagation characteristics of an electric arc on an ice surface have been investigated using high-speed imaging technique. The light emission in both UV and visible regions under ac voltage during the arc propagation has been recorded using an ultra high-speed camera and an image intensifier. The initiation and p…
To guarantee the insulation strength of gas insulated substations (GIS), a number of different voltage waveforms, e.g., switching, lightning and AC have to be applied to the GIS after installation. Because of very huge dimensions of GIS for nominal high voltages, it is not possible to carry out these tests in the fact…
Natural rubber (NR) nanocomposites filled with carbon nanotubes (CNT) and organoclay (O-MMT) were prepared by melt mixing, and their vulcanization, mechanical, thermal and flammability properties were characterized. The obtained results were compared with those of carbon black (CB) and pure NR composites. The incorpor…
The electron paramagnetic resonance g factors and the local structure for Ni3+ in LaAl0.9Ni0.1O3 (LAN), La0.75Y0.25Al0.99Ni0.01O3 (LYAN) and YAl0.9Ni0.1O3 (YAN) are theoretically studied from the perturbation formulas of the g factors for a 3d7 ion of low spin (S = 1/2) in tetragonally elongated octahedra. In these fo…
This paper focuses on the control of tunable lossy matching networks base on barium-strontium-titanate varactors. With the varactors' characteristic, the existence of the optimality, i.e. maximal transducer gain, is investigated, and then compared with criteria of minimal reflection. A simple conjugate gradient method…
The focus of this research article is on the requirement, preparation and application of an improved material system composed of boron and carbon. These are known as boron rich boron carbides. The ability to form BRBC other than widely studied B4C composition through solid state reactive processes; hold an appeal owin…
Magnetization reversal in a V 15 magnetic molecular cluster is studied theoretically and the results of calculations are compared with the available experimental data. Analytical and numerical methods (e.g., a modified Lanczos method) are used for calculating the energy spectrum of the cluster and for determining a se…
The density functional theory (DFT) based ab initio calculations of the phonon spectra of the chain compounds, TlSe and TlInSe 2 , with analogous crystal structures have been carried out. For both materials, the derived frequencies and symmetry of the phonon modes in the center of Brillouin zone agree well with the ex…
The effect of a magnetic field on the planar chromatographic retention of some PAH has been investigated. The horizontal chamber was placed between two neodymium magnets and chromatograms were developed in the magnetic field created. The effect of the magnetic field was tested for single-component and binary mobile ph…
The dependences of the structural, optical and electrical properties of highly transparent conductive Ga-doped ZnO (GZO) films on thickness have been studied. GZO films were prepared on unheated glass, polymethyl methacrylate (PMMA) and cyclo olefin polymer (COP) substrates by ion plating deposition with direct-curren…
This paper presents a new modeling approach for faster calculation of potential distribution along full scale post station insulators covered with ice under melting conditions. The proposed approach consists in modeling the conductive water film at the ice surface using a specific boundary condition implemented in a c…
By in situ neutron diffraction during tensile tests of a strongly <100> textured Nb wire, we have shown the development of internal tensile microstresses of the order of 20 % of the flow stress, acting normal to the longitudinally aligned {110} planes. Such stresses are retained as residual stresses upon unloading. Th…
Single-crystalline, transparent conducting ZnO nanowires were obtained simply by Ti plasma immersion ion implantation (PIII). Electrical transport characterizations demonstrate that the n-type conduction of ZnO nanowire could be tuned by appropriate Ti-PIII. When the energy of PIII is increased, the resistivity of ZnO…