Materials Literature
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Spintronic devices promise new faster and lower energy-consumption electronic systems. Graphene, a versatile material and candidate for next generation electronics, is known to possess interesting spintronic properties. In this paper, by utilizing density functional theory and non-equilibrium green function formalism,…
We investigate longitudinal spin excitations (LSEs) as a probe of microscopic origin of magnetic ordering in parent pnictides BaFe 2 As 2 and NaFeAs. Currently adopted interpretation of LSEs as bottom of particle-hole continuum points unambiguously toward itinerant-electron magnetism, but is difficult to reconcile wit…
Two-dimensional mussel-inspired polydopamine (PDA) nano-sheets are prepared and exploited as a functional surface for grafting various polymer brushes by R. Jordan, I. Amin, and co-workers, as described on page 1489. The PDA nanosheet and its polymer-brush derivatives show lateral integrity and are robust; therefore,…
In this paper, the optical properties of the novel windmill-shaped chiral metamaterial (CMM) with low ellipticity have been studied numerically in THz band. The dispersionless optical activity can be achieved in a wide frequency range (i.e. from 1.7 THz to 2.7 THz). The dependence of CMM’s optical properties on the st…
We derive a Ginzburg–Landau (GL) expansion in the disordered attractive Hubbard model within the combined Nozieres–Schmitt-Rink and DMFT+Σ approximation. Restricting ourselves to the homogeneous expansion, we analyze the disorder dependence of GL expansion coefficients for a wide range of attractive potentials U, from…
Metal contacts are fundamental building components for graphene based electronic devices and their properties are greatly influenced by interface quality during device fabrication, leading to resistance variation. Here we show that nickel graphene junction degrades after air exposure, due to interfacial oxidation, thu…
Angelo Gismondi,1 Valentina Nanni,1 Giacomo Reina,2 Silvia Orlanducci,2 Maria Letizia Terranova,2 Antonella Canini1 1Department of Biology, 2Department of Chemical Science and Technology, University of Rome “Tor Vergata”, Rome, Italy Abstract: For the first time, we coupled reduced detonation nanodiamonds (NDs) with a…
Pd site doping effect on superconductivity was investigated in the quasi–one-dimensional superconductor Nb 2 (Pd 1− x R x ) 0.76 S 5 (R=Ir, Ag) by measuring resistivity, magnetic susceptibility and Hall effect. It was found that the superconducting transition temperature is firstly slightly enhanced by partial substit…
In the present work multilayer hybrid sol-gel coatings were synthesized on the AISI 316L austenitic stainless steel employed in the fabrication of orthopaedic implants. Hybrid sols were obtained from a mixture of inorganic precursor, TEOS, and organic, GPTMS, using ethanol as solvent, and acetic acid as catalyst. The…
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is usually sandwiched between indium tin oxide (ITO) and a functional polymer in order to improve the performance of the device. However, because of the strong acidic nature of PEDOT:PSS, the instability of ITO/PEDOT:PSS interface is also observed. Th…
A new layered Cu-based oxychalcogenide Ba 3 Fe 2 O 5 Cu 2 S 2 has been synthesized and its magnetic and electronic properties were revealed. Ba 3 Fe 2 O 5 Cu 2 S 2 is built up by alternatively stacking [Cu 2 S 2 ] 2− layers and iron perovskite oxide [(FeO 2 )(BaO)(FeO 2 )] 2− layers along the c axis that are separated…
Author version of an article published in the International Journal of Engineering Research and Applications (IJERA), Vol. 6, Issue 2 (Part 3), 2016.
Catalyst-free growth of one-dimensional zinc oxide (ZnO) nanowires is reported. ZnO nanowires were synthesized on ZnO buffer layers deposited on various-oriented sapphire substrates. Syntheses of ZnO buffer layers and nanowires were performed by ultraviolet pulsed-laser deposition. ZnO nanowire's number density was th…
Magnesium phosphate cements (MPC) had been used as repair materials for deteriorated Portland cement concrete structures. In this paper a new MPC was prepared and the basic properties including workability and compressive strength were tested. The acid attack resistance of MPC was investigated by immersing the MPC mor…
Method for solving a boundary value problem of inhomogeneous unsteady-state heat conduction transfer is considered. This physical process can be described by a boundary value problem for a partial differential equation of the 2nd order. Discrete-analytical method, which turns out the mathematical formulation of the in…
We present a mathematical model and results of computational experiments aimed at investigating multipass zone refining kinetics based on the concept of average impurity concentration in the ingot portion being refined and demonstrate that ultrapurification of an ingot at a small molten zone length has an induction pe…
In the shrinkage flanging, the wrinkling tends to occur due to compressive stress. The wrinkling will cause a difficulty in assembling parts, and severe wrinkling may leads to rupture of parts. The shrinkage flange of the ultra-high strength steel sheets not only defects the product by the occurrence of the wrinkling…
Lead‐free sodium bismuth titanate–aluminate bismuth [0.97(Na 0.5 Bi 0.5 )TiO 3 –0.03BiAlO 3 ] solid‐solution films deposited on (100) Pt/TiO 2 /SiO 2 /Si substrates by a sol–gel process were pyrolyzed and annealed at different temperatures. The film annealed at 725°C with a pyrolysis temperature of 410°C exhibited the…
We investigate hybrid magnetic heterostructures consisting of thin epitaxial films of oxide ferromagnets La0.7Sr0.3MnO3 and intermetallic superlattices (TeCo2/FeCo) n . The magnetic characteristics of the heterostructures were studied by the ferromagnetic resonance and magneto-optical Kerr effect techniques. The inter…
The adsorption of lithium atoms on carbon nanotubes with double vacancy structural defects (2V-defect) is being studied with first-principle modeling. The structure of defective tubes in ground state is considered, the role of effects related to finite sizes of a model is evaluated. It is demonstrated that the locatio…