Materials Literature
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It is shown that, in silver hydrosols that are produced by the reduction of metal cations under the action of borohydride and do not contain electron-donor additives, the photoinduced reduction of Ag + ions and photoinduced oxidation of nanoparticles occur at pH 9.0 and 4.0, respectively. The effect of ionic compositi…
Calculating neoclassical (NC) transport is a fundamental part of the complete simulation cycle of the behavior of plasmas inside all tokamaks and stellerators. Also, due to NC transport is mainly determined by the magnetic properties of the device, its study is mandatory to ensure the efficiency of a certain coil conf…
The paper studies the effect of the dramatic fall in polymeric fiber strength as erosion increases under an oxygen plasma beam. At a relatively small fiber mass loss (20%), the breaking load is reduced by a factor of 20. SEM images reveal that fiber erosion is uneven, and show the deep local etching that leads to fibe…
Abstract We have made a series of Quasi-Elastic Neutron Scattering (QENS) studies of supercooled water confined in 3-D and 1-D geometries, specifically, interstitial water in aged cement paste (3-D) and water confined in MCM-41-S and Double Wall Nano Tube DWNT (1-D). In addition, we also include the cases of hydration…
Formability, which is the property that characterizes the ability of a material to be deformed without fracture or necking, is strongly correlated to the crystallographic texture. Al alloys from the 6xxx series with non-conventional textures were produced by hot and cold asymmetric rolling processes. The plastic respo…
The objective of the study was to determine the effect of strain path on texture, microstructure and mechanical properties development of severely deformed Al-Mn-Mg alloy. The commercial purity material (AA3104 alloy) was deformed via Equal Channel Angular Pressing (ECAP) up to 10 passes following routes A, B, and C.…
We used a micromagnetic model to study the head remanence of a perpendicular tapered main pole head. To reduce the head pole tip remanence, a single magnetic domain structure forming a vortex state from the pole tip to the tapered region is preferred. A tapered main pole structure with a trailing gap depth less than a…
An ultra-low-dielectric-constant (ultra low-k, or ULK) porous SiOCH film is prepared using a single ring-type siloxane precursor of the 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane by means of spin-on deposition, followed by crosslinking reactions between the precursor monomers under UV irradiation. The as…
Regularities of changes in resonance light scattering spectra of silver nanoparticles due to their interactions with protein molecules are studied. This effect can be used to identify biological molecules and elucidate their modification, in particular those due to oxidative processes, using optical techniques.
A process for manufacturing polymer carbon nanotube (CNT) based composite yarns is reported. The aligned CNT structure was combined with a polymer resin and, after being stressed through the spinning process, the resin was cured and polymerized, with the CNT structure acting as reinforcement in the composite yarn. The…
The terminal solid solubility (TSS) of hydrogen during hydride dissolution/precipitation is determined by differential scanning calorimetry technique for nonirradiated hafnium (Hf) that is used as control rods of light water reactors. The hydrogen concentration in hydrogenated Hf samples ranged from 27 to 300 wt ppm.…
We calculate the transverse magnetoresistance in layered electronic systems at nonquantizing magnetic fields parallel and perpendicular to the layer plane and discuss the effect of the relationship between the Fermi level and the mini-band width, and also the direction and magnitude of the magnetic field on the transv…
The synthesis, crystal structure, thermal expansion and electrical conductivity of the ceramic oxide materials (Nd1–xCax)CoO3 (0≤x≤0·5) were investigated. These powders with perovskites structure were synthesized using the sol–gel method. Compositions have a pure orthorhombic structure up to 0·3 Ca doping. The lattice…
Multilayer structures of nanocrystalline (nc-) SiC/silicon nitride spacer/Ag island films were designed by varying the spacer thickness, and the spectral characteristics of surface-plasmons (SPs)–enhanced photoluminescence (PL) in nc-SiC films have been investigated. The optical transmission spectra show that there ar…
The structural parameters, energies, and spectroscopic characteristics of singlet and triplet titanium porphyrin π-complexes Ti(P)(π-L) (P = C 20 H 12 N 4 ) with the axial ligands L = C 2 H 2 , C 2 H 4 , N 2 H 2 , HCN, C 6 H 6 , N 2 , and C 60 coordinated to the Ti atom through C-C, C-N, and N-N multiple bonds have be…
Calcium (Ca)-atom-encapsulated single-walled carbon nanotubes (Ca@SWNTs) are successfully formed by an ion irradiation method using Ca plasma. The electrical transport properties of Ca@SWNTs are experimentally investigated under a field-effect transistor configuration in vacuum and air. The conductance of Ca@SWNTs cha…
2-dimensional dopant mapping in the scanning electron microscope is based on the variation of contrast as a function of differences in the number of active dopant atoms. It was put forward as a potential technique for dopant mapping on the nano-scale in response to the challenge of ever-shrinking device dimensions. It…
Advances in Solid-State Lasers: Development and Applications 2 medium disk with mirrors in order to absorb sufficient pump power, which makes the laser system extremely complicated. Some applications require that the lasers should be compact and economic; therefore, the cooling system is eliminated in compact and easi…
The magnetic structure of the noncentrosymmetrical cubic ferromagnets with Dzyaloshinskii-Moriya interaction Mn 1− y Fe y Si with y = 0, 0.06, 0.08, and 0.1 has been studied by means of the small angle neutron diffraction and magnetization measurements. These compounds are shown to be ordered into the helix structure…
Ce 3+ -doped yttrium lanthanum oxide (Y 0.9 La 0.1 ) 2 O 3 transparent ceramics is fabricated with nanopowders and sintered in H 2 atmosphere. The spectral properties of Ce:(Y 0.9 La 0.1 ) 2 O 3 transparent ceramics are investigated. There appear two characteristic absorption peaks of Ce 3+ ions at 230 nm and 400 nm,…