Materials Literature
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We present results of Shubnikov-de Haas oscillation measurements on detwinned BaFe 2 As 2 and de Haas-van Alphen oscillation measurements on KFe 2 As 2 . The Fermi surface of BaFe 2 As 2 in the antiferromagnetic phase is found to consist of one hole and two electron pockets, all of which are three-dimensional and clos…
Three catalysts were prepared from copper oxide carried on a matrix of a mixture of Syrian, Jordanian natural zeolite, Syrian bentonite, and Al2O3–CuO. As a simulation to the field motor car condition, a good quantity of macrosize granules of the catalyst was used, and the initial reacting agents were the car exhaust…
Following the seminal detection of superconductivity at 35 K in the first cuprate high temperature superconductor Ba-doped ternary LCO (La214) by Mueller and Bednorz in 1986, the discovery of the first liquid nitrogen superconductor quaternary YBCO (Y123) with a transition temperature T c of 93 K by Chu, Wu, and colle…
The microcantilevers based on the antiferroelectric (AFE)$({\rm Pb}_{0.97}{\rm La}_{0.02})({\rm Zr}_{0.95}{\rm Ti}_{0.05}){\rm O}_{3}$(PLZT) thick films were fabricated by bulk silicon micromachining process. The conspicuous electrostrictive strain properties with phase transition of the AFE PLZT films induced by elec…
High-pressure experiments have made many important contributions to the field of superconductivity, including studies on the Cu-oxide and Fe-based high-temperature superconductors (HTS). However, for detailed quantitative understanding, the nature of the high-pressure environment acting on the sample must be well defi…
Alkenylations of p-xylene with phenylacetylene over various zeolites like HY, H-Beta, and H-ZSM-5 have been performed. Effects of the types of zeolite and pretreatment conditions, such as ion exchange times, calcination temperature, and HCl concentration for dealumination, on the catalytic properties have been studied…
Abstract Hardness is being assessed as a potential life-assessment tool for tracking microstructural degradation and remaining life in creep strength enhanced ferritic (CSEF) steels. Such methodology is already being utilized for the CSEF steel Grade 91, which has been widely implemented in both replacement parts and…
Stoichiometric glassy germanate is an important material in geophysics and materials science. Despite the binary Li2O−GeO2 system being primitive, its crystallization mechanism remains undetermined. In this study, we investigated crystallization and structural ordering in glassy ferroelectric Li2Ge4O9. Using isotherma…
In this paper, the effect of interlayer voltage V on the bandgap and density of state (DoS) and carrier concentration is analysed using a new analytical approach. We begin by modelling of the DoS followed by carrier concentration as a function V . In addition, we model the carrier concentration in degenerate and non-d…
ABSTRACT This article investigates the effects of electron beam irradiation on the mechanical and thermal properties of polypropylene/polyamide6 blends (45/55) with talc 20% (w/w) as filler, SEBS‐g‐MAH 5% (w/w) as compatibilizer, and 10 phr triallyl isocyanurate (TAIC). TAIC is a polyfunctional monomer and acts as a c…
A series of liquid crystalline polymers (LCPs) have been synthesised by two cholesteric monomers M1, M2 and a nematic monomer M3. The chemical structures and liquid crystalline properties of the monomers and polymers have been characterised by FTIR, 1H-NMR, differential scanning calorimetry, thermogravimetric analyses…
We discuss an effective spin Hamiltonian with biquadratic interaction for ferropnictide superconductors from the point of view of band structure theory and available experimental data. This model is consistent with electronic structure calculations and captures many observed magnetic properties, including the anisotro…
Precisely characterizing epoxy/thermoplastic interfaces on the nanometer scale using scanning electron microscopy energy-dispersive X-ray (EDX) represents a current challenge due to the large X-rays generation volume, specimen decomposition, and related phenomena occurring with polymer samples. Interface characterizat…
Beam Intercepting Devices (BID) are designed to operate in a harsh radioactive environment and are highly loaded from a thermo-structural point of view. Moreover, modern particle accelerators, storing unprecedented energy, may be exposed to severe accidental events triggered by direct beam impacts. In this context, im…
Oriented Co nanoparticles were obtained by Co ion implantation in crystalline ZnO thin films grown by pulsed laser deposition. Transmission electron microscopy revealed the presence of elliptically shaped Co precipitates with nanometer size, which are embedded in the ZnO thin films, resulting in anisotropic magnetic b…
This paper presents the use of the quartz crystal microbalance with dissipation (QCM-D) combined with surface plasmon resonance (SPR) to probe protein adsorption at nanopatterned surfaces. Three different types of adsorbing materials, representing rigid discrete nanoparticles, dense protein films, and soft low density…
The contribution of flexoelectric polarization to the dielectric susceptibility in helicoidal liquid crystals is formulated for the static equilibrium case, and further in the case of a time-varying field. A dispersion of the dielectric permittivity due to the frequency response of flexoelectric switching is described…
A molecular structure of a double-decker phthalocyaninato-terbium(III) anion (TbPc2−) is optimised by density functional theory (DFT) and DFT with a dispersion interaction (DFT-D) method. The DFT-D method such as B3LYP-D and B97-D functional sets estimates phthalocyaninato (Pc) ions to be planar although B3LYP and PBE…
ABSTRACT In this study, multiwalled carbon nanotubes (MWCNTs) were dispersed into a poly(3‐hydroxybutyrate‐ co −3‐hydroxyvalerate) (PHBV) matrix, in which PHBV was either covalently attached to the nanotubes through an esterification reaction between the carboxylic groups of functionalized MWCNTs and the hydroxyl grou…
Experiments performed on different iron – based superconductors suggest a variety of possible structures of the superconducting energy gap, both nodeless and nodal. To understand the pairing mechanisms, it is important to identify common features in the behavior of different materials. Measurements of the temperature…