Materials Literature
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Eu3+ doped GdVO4 was successfully prepared by a simple hydrothermal method. It was characterized by x-ray diffraction and scanning electron microscopy, which revealed that the GdVO4:Eu3+ was tetragonal (zircon-type structure). Photoluminescence spectra revealed that there was efficient energy transfer from the GdVO4 h…
In Phys. Fluids 19, 118105 (2007), I. Lunati disputes my earlier paper [Phys. Fluids 18, 047102 (2006)], in which I pointed out an anomaly arising from Thomas Young’s concept of solid/fluid surface tension. The present article examines Lunati’s reasoning and concludes that my earlier paper is correct.
The photoluminescence (PL) of nanocrystal present in porous silicon shifts from the near infrared to the ultraviolet depending on the size when the surface is passivated with Si-H bonds. After oxidation, the centre wavelength of PL band is pinned in a region of 700–750 nm and its intensity increases obviously. Calcula…
This paper experimentally investigates the dynamic characteristics of electrically controlled modulators based on liquid crystals (LCs) in the visible and near-IR regions and the effect of the electric-field parameters on them, along with the variation of the conditions of the interphase interaction of the LCs with th…
This paper reports that a simple chemical vapour deposition method has been adopted to fabricate large scale, high density boron nanocones with thermal evaporation of B/B 2 O 3 powders precursors in an Ar/H 2 gas mixture at the synthesis temperature of 1000–1200°C. The lengths of boron nanocones are several micrometre…
By means of hybrid method of the density functional B3LYP with 6-31G(d) basis set we carried out calculation of geometric parameters of Co(II), Co(III), Ni(II) and Cu(II) complexes with macrocyclic ligand formed at the template processes in the systems M(II)-dithiooxamide-acetone with NNSS-coordination of donor center…
Short pulsed laser induced single acoustic wave generation, propagation, interaction with rigid structures, and focusing in water are experimentally and numerically studied. A large area short duration single plane acoustic wave was generated by the thermoelastic interaction of a homogenized nanosecond pulsed laser be…
In direct carbon fuel cells (DCFCs), elemental carbon is electrochemically oxidized to generate electrical power. Carbon is readily available, easily transported and stored and, therefore, affordable to the global energy economy. Further operational advantages include the use of fully renewable solid biocarbon fuel so…
An experimental setup has been developed to simulate the road salt deposit process on energized high voltage insulators under one set of winter conditions. The variation in accumulation rate of salt deposit density (SDD) with wind speed was established through systematic laboratory investigations. Tests were made with…
Some preliminary studies on influences that heat transfer acts on thermoelectric generator have done in this paper. Based on basic principles of the thermoelectric generation technology and the finite time thermodynamics, the thermoelectric generator performance analysis mathematical model has been established. Throug…
Abstract CdS Quantum dots (QDs) are synthesized in aqueous solution with bovine serum albumin (BSA) as the stabilizing agents using a stepwise procedure at room temperature. They can be used as a new fluorescence probe in the determination of Cu 2+ , which is proved to be a simple, rapid and specific method. Approxima…
Non-thermal plasma technology has attracted considerable attention due to simultaneous removal of nitrogen oxide (NOx) and sulfur oxide (SO2) from flue gas. In this study, the synergistic effect of methanol and catalyst on NO, NOx and SO2 removal efficiency in a plasma reactor is investigated. The results show that th…
Abstract Zirconium alloys with low alloying content are mainly used in the nuclear industry as structural materials because of their superior properties in terms of neutron transparency, mechanical strength, and corrosion resistance. In order to further improve the corrosion resistance as well as the integrity of Zr b…
One of the major challenges for the commercialization of planar anode-supported solid oxide fuel cell (SOFC) is the development of suitable high temperature sealant. The sealants must maintain gas-tightness between the anode and the cathode compartments to avoid intermixing of fuel and oxidant at high operating temper…
Polyelectrolyte and nanocomposite microcapsules with shells containing iron oxide (Fe3O4 magnetite) nanoparticles have been obtained using the layer-by-layer polyion assembly technique. The volume fraction of nanoparticles was varied by changing the number of their layers in the shell. The dependence of the microcapsu…
The IR and Raman spectra of plasticized poly(methyl methacrylate) (PMMA) are measured and analyzed in the frequency range 10–120 cm −1 , in which the absorption and scattering due to the individual (85–90 cm −1 ) and correlated librational vibrations (15–20 cm −1 , boson peak) preceding the appearance of relaxation dy…
The inclined plane test for tracking and erosion resistance of materials, IEC-60587, has become a routine tool for researchers developing high voltage outdoor insulation materials. The test is designed for ac applications and many laboratories have many years of experience with the technique. DC power systems are beco…
Abstract:- Due to their unique properties and behavior, the Shape Memory Alloys (SMAs) play an increasingly important role in the intelligent systems performance. Recent applications in structural actuation and sensing demand increased material capabilities. This paper reviews the main advantages and the properties of…
We have synthesized supercapacitor electrodes fashioned of NiO(x)/multiwalled carbon nanotubes (MWNTs), in which the controlled NiO(x) nanoparticles were prepared via a simple colloidal method and supported on the MWNTs. The sizes of the NiO(x) nanoparticles on MWNTs were systematically varied from 4 to 14 nm at a fix…
Neutral hydrogen molecule is an important constituent of edge plasma in tokamak reactors. These molecules are continuously produced by ion neutralisation and recombination on plasma walls and are subsequently reemitted in the plasma. We initiated an experimental program to study processes in which vibrationally excite…