Materials Literature
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An interband-transition model was applied to explain the emission mechanism in porous silicon (PSi) fabricated by photoetching in aqueous HF and salt (NaF and KF) solutions. The HF-formed samples show a yellow photoluminescence band at ∼2 eV. The salt-formed samples, on the other hand, show an ultraviolet (UV) emissio…
We present the results of measurements of low-temperature heat capacity, as well as electrical and magnetic properties of Heusler alloys Fe 2 VAl and Fe 2 CrAl prepared in different ways using various heat treatment regimes. The density of states at the Fermi level is estimated. A contribution of ferromagnetic cluster…
A method to directly synthesize single crystalline cadmium oxide (CdO) nano-cubes in an atmospheric-pressure microwave-plasma is presented. The advantages of rapid synthesis within a few seconds and of template- or catalyst-free synthesis provide a chance of practical production and application of CdO nano-particles.…
Crystal chemical analysis of several large sets of topologically related structures confirms earlier suggestions that within the same cell content, space group, and Wyckoff site occupancies, there may exist several structure types of sometimes quite different coordination chemistry and bonding arrangement. The origina…
We report effects of thermal annealing on the structures of Ge–Sb–Te (GST) nanoparticles synthesized by pulsed laser ablation deposition. The average diameter of the GST nanoparticles is an order of 10nm. The as-prepared sample contains nanocrystals surrounded by an amorphous phase. Further crystallization occurs duri…
Over the past few years, the steady increase in the cost of oil has resulted in higher resin prices. This market trend has imposed a significant burden on plastic parts manufacturers since resin typically accounts for 50—60% of the total manufacturing cost of plastics. In turn, many companies have been looking for way…
The electrochemical behavior of cast Mg, AZ91, and cast AZ91 in 0.1 M NaCl solution is investigated by measuring open-circuit potential (OCP), steady-state current-potential, and electrochemical impedance spectra (EIS). The similar electrochemical impedance behavior is found of three corrosion electrodes. There are tw…
We propose an objective formulation of the impulse analysis problem from a signal analysis viewpoint. The winding response is quintessentially that of a deterministic network to a finite energy signal, with breakdown and partial discharge being inherently nonlinear events. A significant improvement to the acquisition…
MgTi 2 O 5 (karrooite) exhibits cation exchange between the two non-equivalent octahedral M1 and M2 sites. The temperature dependence of Ti-Mg disorder has been determined using in situ timeof- fight powder neutron diffraction to establish the cation population of each site. The equilibrium Ti-Mg exchange commences ab…
We consider the dynamics of spin facilitated models of glasses in the non-equilibrium ageing regime following a sudden quench from high to low temperatures. We briefly review known results obtained for the broad class of kinetically constrained models, and then present new results for the behaviour of the one-spin fac…
Removal of platinum group metals (PGMs) such as Pd, Ru, and RuO2 from molten glass by using various amounts of liquid Cu was done as a basic study on a new vitrification process for a high-level radioactive waste. We prepared two types of borosilicate glasses containing PGMs and Cu, respectively. These glasses were mi…
The influence of the growth temperature on the atomic ordering and interlayer diffusion of Heusler alloy Co2FeSi films grown on GaAs(001) substrates has been studied using high-resolution transmission electron microscopy. The Co2FeSi∕GaAs(001) films grown below 200°C show a coexistence of the Heusler-type L21 phase an…
Effects of treatment using ammonia plasma on poly(lactic acid) (PLA), poly(ethylene terephthalate) (PET), and liquid-crystal polymer (LCP) were investigated to elucidate differences related to polymer structures and the mode of introduction of nitrogen functional groups onto the polyester surfaces. Nitrogen functional…
FTIR spectroscopy technique has been applied for the analysis of high energy heavy ion irradiated kapton-H polyimide. The kapton-H samples were irradiated with 75 MeV oxygen, 80 MeV nickel and 50 MeV lithium ions at PELLETRON facility, Nuclear Science Centre, New Delhi. A very broad peak in 2500-3500 cm -1 is due to t…
In the present contribution, ultrafine fibers were spun from poly(vinyl alcohol) (PVA)/water solution using a homemade electrospinning set-up. The effects of the concentration of polymer solution, spinning voltage and collection distance between the tip to target on the morphological appearance and average diameter of…
Epitaxial magnetite (Fe3O4) thin films were deposited by molecular beam epitaxy using molecular oxygen as the oxidant. Films deposited on (001) SrTiO3, (001) MgO, and (001) BaTiO3 surfaces are epitaxial with the film (001) parallel to the substrate (001) and the film ⟨100⟩ parallel to the substrate ⟨100⟩. X-ray magnet…
Polypropylene (PP) nanocomposites consisting of E-glass are manufactured by the process of pultrusion. Thermal and mechanical characterization of nanocomposite has been performed and compared with that of traditional microcomposites. In addition, the nanocomposite is characterized by means of optical micrographs (OPM)…
Materials exhibiting an antimicrobial effect are especially advantageous for medical textiles which are in very close and long-term contact with human skin. Orthopaedic stockings made of terry cotton and polyamide were coated with silver nanoparticles by a simple dip coating process under mild conditions. Both textile…
The authors fabricated diodes of Au, Al, Ni, Pt, Pd, Mo, Ta, and Ir on single crystal ZnO(0001¯) surfaces from different vendors and measured their Schottky barriers, idealities, and reverse currents on as-received and remote oxygen (20% O2∕80%He) plasma-treated surfaces. Using low temperature nanoscale depth-resolved…
The structural, dielectric, magnetic, and magnetodielectric properties were systematically investigated for (1−x)BaTiO3−(x)LaMnO3 composites in wide temperatures, frequencies, and mole percent (x). Dielectric anomaly around 410 K and magnetic hysteresis at 293 K were clearly observed, which might imply the coexistence…