Materials Literature
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Pure ZnO was prepared at lower temperature (30 °C) by electrodepositing at higher temperature (50 °C), and Zn-incorporated ZnO was prepared. They were thermally treated in oxygen at different temperatures to investigate their optical characteristics using photoluminescence. The UV band from the band-edge emission is o…
Abstract The experimental results concerning continuous mass crystallization process in L(+)‐ascorbic acid – water system are presented and discussed. Influence of L(+)‐ascorbic acid concentration in a feeding solution and mean residence time of suspension in laboratory DT MSMPR crystallizer on product crystal size di…
A Nickel Dimethylglyoxime (Ni‐DMG) compound was dispersed in polymethyl methacrylate (PMMA) films at different concentrations. PMMA was synthesized by a solution polymerization technique. These films were irradiated with 120 MeV Ni10+ ions at the fluences of 1×1011 and 1×1012 ions/cm2. The radiation induced changes in…
Vibrational properties of the gallium hydrides SrGa2H2 and BaGa2H2 have been investigated by means of inelastic neutron scattering (INS) and first-principles calculations. The compounds contain Ga-H units being part of a two-dimensional polyanionic layer, [(GaH)(GaH)]2-. The INS spectra are composed of dispersed inter…
ZnO nanoflowers are synthesized on AlN films by solution method. The synthesized nanoflowers are composed of nanorods, which are pyramidal and grow from a central point, thus forming structures that are flower-shaped as a whole. The nanoflowers have two typical morphologies: plate-like and bush-like. The XRD spectrum…
Epitaxial AlN films were prepared on GaN/sapphire using a helicon sputtering system at the low temperature of 300 degrees C. Surface acoustic wave (SAW) devices fabricated on AlN/GaN/sapphire exhibited superior characteristics compared with those made on GaN/sapphire. An oscillator using an AlN/GaN/sapphirebased SAW d…
Abstract In this work, stability of graphene nanoribbons are investigated using molecular dynamics. Simulations include heating armchair and zigzag‐edged nanoribbons of widths varying between one and nine hexagonal rings until the bonds between carbon atoms start to break. Breaking temperatures and binding energies pe…
Abstract— Hypervelocity capture of material in aerogel can expose particles to high transient temperatures. We tested some of the possible effects of capture by using a light‐gas gun to shoot particles of basalt glass into aerogel at 6.1 km s−1. Using synchrotron‐based micro‐X‐ray absorption spectroscopy (μXAS), we fi…
Ultrafine and uniform TiO2 nanofibres were prepared by electrospinning. The morphology of the nanofibres was characterised by field emission scanning electron microscopy, which showed that the nanofibres were composed of ultrasmall nanoparticles. The structure was characterised by X-ray diffraction and resonant Raman…
Abstract A new open‐framework iron phosphite, [C4N2H12][Fe4(H2O)3(HPO3)7]·(H2O)x x = 0.6 (1), has been prepared by the hydrothermal reaction between FeCl3·6H2O, H3PO3, and piperazine. The three‐dimensional structure is comprised of a network of FeO6, FeO5(H2O), and HPO3 polyhedral units connected through their vertice…
High purity copper was ground by high energy milling and the resulting nanocrys- talline power sintered by Capacitor Discharge Sintering to dense (93% of theoretical density) bulk components. The evolution of the nanostructure from the starting nanocrystalline pow- der to the sintered component was studied by Whole Po…
Mutually immiscible in the solid state, copper and niobium exhibit a relatively strong clustering (phase separating) tendency in the liquid state and can therefore only be alloyed in a highly metastable form: for example, by vapor quenching. We have deposited metastable Cu–Nb alloy thin films with nominal compositions…
Electrical properties of isotype n-ZnO/n-GaN heterostructures obtained by radio-frequency sputtering of ZnO films on GaN layers are studied by means of temperature dependent current-voltage (I-V-T) characterization and electron beam induced current (EBIC) measurements. The n-ZnO/n-GaN diodes showed highly rectifying b…
Abstract Two series of Au–TiO2 composite films with Au percola‐ tion threshold qC of 0.34 and 0.82 were prepared by using sputtering technique at the pressure of 5.0 × 10–2 and 8.0 × 10–2 Torr, respectively. As qC increases from 0.34 to 0.82, the plasmon resonant absorption of the composite films near qC shifts from a…
Recently, many efforts have been dedicated to the development of a reliable technology for the introduction of artificial pinning sites in YBa 2 Cu 3 O 7-x (YBCO) films with the aim of improving the in-field J c performances. One of the most effective technique resulted to be the inclusion of BaZrO 3 (BZO) second phas…
The paper deals with hydrophobization of bentonites (layered aluminosilicates) with quaternary ammonium salts (QAS) and potential application of the products obtained as fillers for preaccelerated unsaturated polyester resins (UPs) to be applied in vacuum casting. Natural purified bentonites of "Special" and "SN" type…
La0.7Ca0.3 − x Na x MnO3 ± γ (LCNM) solid solutions with x = 0, 0.04, 0.06, 0.08, and 0.10 have been synthesized (rhombohedral structure, sp. gr. R $$ \overline 3 $$ c). Sodium volatility during sintering is shown to lead to the formation of vacancies on the lanthanum and oxygen sites. Ca2+ → Na+ substitution does not…
Clinical success of many therapies is impaired by dose limiting toxicities. Nanoscale particle-based drug delivery systems such as liposomes show unique pharmacokinetic properties and improved toxicity profiles. Liposomes accumulate in tumor tissue, but only a small fraction of a total dose reaches the target site. Th…
Corrosion behavior of carbon steel in carbon dioxide (CO2)-loaded activated methyl diethanol amine (a-MDEA) solution was investigated using Tafel polarization and alternating current (AC) impedance techniques. Results indicated that a passive iron carbonate (FeCO3) film is formed after a critical current density in al…
Abstract Two novel 3D network coordination polymers {Mn(L)2[Ag(CN)2]2}{Mn(H2O)2[Ag(CN)2]2} (L = 4-CNpy (1) or py-4-aldoxime (2)) (4-CNpy = 4-cyanopyridine; py-4-aldoxime = pyridine-4-aldoxime) were synthesized and characterized by using single-crystal X-ray analysis and magnetic measurements. Both complexes have two d…