Materials Literature
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The phenomenon of giant magnetoresistance (GMR) in spin-valves under applied magnetic field is well established. We present piezoelectric control of the GMR ratio at room temperature for standard multilayered spin-valve structure fabricated on (011)-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) piezoelectric substrate. Four sample…
We have recently reported erbium (Er)-related visible and infrared (∼1540 nm) electroluminescence (EL) from the light-emitting device (LED) based on Er-doped TiO2 (TiO2:Er)/p+-Si heterostructure, triggered by the energy transferred from oxygen-vacancy-related self-trapped excitons (STEs) to Er3+ ions in anatase TiO2.…
In this work, the fundamental properties of the TlGaSeS single crystals are investigated by means of temperature dependent electrical resistivity and Hall mobility. The crystal photo-responsibility as function of illumination intensity and temperature is also tested in the temperature range of 350-160 K. The study all…
Abstract In this paper we report a detailed µ + SR and 19 F NMR study of the La 0.7 Y 0.3 FeAsO 1− x F x class of materials. Here, the diamagnetic La 1− y Y y substitution increases chemical pressure and, accordingly, sizeably enhances the optimal superconducting transition temperature. We investigate the magnetic–sup…
ZnO nanowalls are rapidly grown on a glass substrate using a low-temperature thermal evaporation method, without the use of a catalyst and the pre-deposition of a ZnO seed layer on the substrate. Most of the ZnO nanowalls are grown vertically and are about 70-200-nm thick and 2-μm long. The room-temperature photolumin…
We experimentally demonstrate extraordinary optical transmission (EOT) assisted photoluminescence (PL) of CdSe/CdS colloidal quantum dots (QDs). The quantum dots were encapsulated between a metallic nanostructure and a Bragg reflector to enhance the interaction of spontaneously emitted photons with a resonant electrom…
Highly textured ZnO thin films were implanted with Co ions at fluences of 1 × 10 16 and 1 × 10 17 ions cm −2 . Although their microstructure observed by analytical high-resolution electron microscopy was very different, SQUID magnetometer measurements showed qualitatively similar magnetic properties. In the low-fluenc…
The Zn0.97−xCr0.03GaxO (0 ≤ x ≤ 0.03) films have been prepared by inductively coupled plasma enhanced physical vapor deposition and investigated by soft x-ray absorption spectroscopy. The soft x-ray absorption spectroscopy results indicate Ga doping can substantially transform Cr3+ to Cr2+ and improve the average magn…
ABSTRACT Chemical vapour deposition (CVD) had been used to produce carbon nanotube (CNT) coated carbon fibre, referred to in this work as nano‐hybrid fibres. In order to understand the gas flow behaviour inside the CVD reactor, computational fluid dynamics (CFD) has been utilised to simulate the process in a horizonta…
Tb0.3Dy0.7Fe2/Pt/PbZr0.56Ti0.44O3 (Terfenol-D/Pt/PZT) thin films were sputtered on Pt/TiO2/SiO2/Si substrate. PZT and Terfenol-D layers were chosen for their large piezoelectric and magnetostrictive coefficients, respectively. 4%–5% magnetocapacitance has been measured on a Terfenol-D/Pt/PZT stack at room temperature.…
Although localized atomic 2p orbitals have been taken as the possible origin of d0 materials, the collective magnetic ordering is impeded by the low concentration of local magnetic moments. Using first-principles calculations with wurtzite GaN as a prototype material, we predict that the delocalized defect orbitals ca…
Medical-grade polyvinyl chloride was modified by incorporation of silver nitrate in a concentration range from 0 to 5 wt.% using a solvent casting technique. Agar diffusion test was performed to evaluate in-vitro antimicrobial properties of prepared samples. The obtained systems were characterized by tensile test, X-r…
A study of the addition of nucleophilic reagents that are also strong Brønsted bases (Et 3 N, pyridine, quinuclidine, MeO – ) to n Bu 4 P + [PtBr 3 (C 2 H 4 )] − ( 1 ) and trans -[PtBr 2 (NHEt 2 )(C 2 H 4 )] ( 7 ) has provided key information on the deactivation of the hydroamination PtBr 2 /Br – catalyst, leading to…
BACKGROUND: Multimodal contrast agents usually containing two or more signal components can be used for several imaging modalities. Thus, complimentary information can be obtained by using just one kind of contrast agents. PURPOSE: To investigate the potential of superparamagnetic perfluorooctylbromide nanoparticles (…
An amperometric cholesterol biosensor was fabricated using polyaniline-coated polyester films. Polyaniline was dissolved in chloroform with camphorsulfonic acid, and polystyrene was added to this solution. Using this mixed solution, the coating was placed onto polyester films. Cholesterol oxidase was immobilized onto…
Magnesium – nickel alloys have been considered an alternative for AB5 and AB2-type alloys in nickel–metal hydride batteries due to their larger maximum discharge capacities, but their low stability in alkaline solution has hindered their use in commercial cells. Aiming to improve the electrode performance of the Mg55N…
Anodizing of aluminium alloys is often used to improve appearance, corrosion resistance or adhesion with organic coatings, with properties of the oxides tailored by controlling the anodizing conditions. Some electrolytes can be used in relatively wide ranges of concentration, temperature and potential or current, whil…
Three new 'short' metallacycles are selectively obtained from the reaction of a bimetallic Cu(I) 'U-shape' molecular clip with, respectively, the cyano CN(-), tricyanomethanide C(CN)(3)(-), and azido N(3)(-) pseudohalogenide ions. These supramolecular assemblies have been characterized by spectroscopic methods, single…
Manipulating and controlling water-based aqueous solutions with the use of virtual walls is relatively simple compared to that of nonaqueous low-surface-tension liquids, which pose greater challenges to microfluidic devices. This letter reports a novel technique to form a virtual wall for various low-surface-tension l…
In this work, a biodegradable polymer composite was prepared by mixing poly(ethylene succinate- co -5.1 mol % ethylene adipate) (PESA) and octavinyl-polyhedral oligomeric silsesquioxanes (ovi-POSS) at a very low ovi-POSS loading. It is found that a fine dispersion of ovi-POSS has been achieved in the PESA matrix. The…