Materials Literature
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Purpose To evaluate the inhibition efficiency (IE) of polyvinyl alcohol (PVA) in controlling the corrosion of carbon steel immersed in neutral aqueous solutions containing 60 ppm of Cl − , in the absence and presence of Zn 2+ . To investigate the influence of sodium sulphite (Na 2 SO 3 ), sodium dodecyl sulphate (SDS)…
Single magnetic atoms embedded in a nonmagnetic host exhibit the Kondo effect in the bulk limit, while in very small molecules the magnetic atom is hardly affected by the matrix. In a combined theoretical (density functional theory) and experimental (photofragmentation and mass spectrometry) study we consider the inte…
Transparent Li2O–Ga2O3–SiO2 (LGS) glass-ceramics embedding Ni:LiGa5O8 nanocrystals were fabricated. An intense emission centered around 1300nm with the width of more than 300nm was observed by 976nm photoexcitation of the glass-ceramics. The lifetime was more than 900μs at 5K and 500μs at 300K. The emission could be a…
We extend a previously studied lattice model of particles with infinite repulsions to the case of finite-energy interactions. The phase diagram is studied using grand canonical Monte Carlo simulation. Simulations of dynamical phenomena are made using the canonical ensemble. We find interesting order-disorder transitio…
Precipitation kinetics of Al3Zr and Al3Sc in aluminum supersaturated solid solutions is studied using cluster dynamics, a mesoscopic modeling technique which describes the various stages of homogeneous precipitation by a single set of rate equations. The only parameters needed are the interface free energy and the dif…
Purpose To provide a selective bibliography for graduate students and new faculty members with sources which can help them develop their academic career. Design/methodology/approach A range of published (1951‐2004) works, which aim to discuss the main parameters of the volatile corrosion inhibition process. The source…
Layer-by-layer structures of gadolinia-doped ceria and zirconia have been synthesized on Al2O3(0001) using oxygen plasma-assisted molecular beam epitaxy. Oxygen ion conductivity greatly increased with an increasing number of layers compared to bulk polycrystalline yttria-stabilized zirconia and gadolinia-doped ceria e…
We investigate three-dimensional left-handed and related metamaterials based on a fully symmetric multigap single-ring split-ring resonator (SRR) design and crossing continuous wires. We demonstrate isotropic transmission properties of a SRR-only metamaterial and the corresponding left-handed material that possesses a…
Density functional calculations with a large unit cell have been conducted to investigate adsorption, segregation and magnetization of Mn monomer on GaAs(110). The Mn adatom is rather mobile along the trench on GaAs(110), with an energy barrier of 0.56 eV. The energy barrier for segregation across the trenches is neve…
Until recently, the heat capacity of GaN had only been measured for polycrystalline powder samples. Semiempirical as well as \textit{first-principles} calculations have appeared within the past few years. We present in this article measurements of the heat capacity of hexagonal single crystals of GaN in the 20-1400K t…
The temperature dependence of the O $K$-edge pre-edge structure in the x-ray absorption spectra of the perovskites ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{A}}_{x}\mathrm{Mn}{\mathrm{O}}_{3}$ ($A=\mathrm{Ca},\mathrm{Sr}$; $x=0.3,0.4$) reveals a correlation between the disappearance of the splitting in the pre-edge re…
Organics-capped ZnSe quantum dots were synthesized by a colloidal chemical approach using ZnO and Se powder as precursors. The photoluminescence of the specimens showed strong white emission (∼200nm full width at half maximum) in the visible range under ambient conditions. The white emission was attributed to the mixi…
A technique has been developed for depositing diamond crystals on the endfaces of optical fibers and capturing the fluorescence generated by optically active defects in diamond into the fiber. This letter details the diamond growth on optical fibers and transmission of fluorescence through the fiber from the nitrogen-…
The quantum theory of the fluctuations of the van der Waals (vdW) force between macroscopic bodies is developed. Unlike the mean vdW force that is determined by all quantum states that contribute to the optical absorption, the energies of those excitations of the interacting bodies that contribute effectively to the v…
The dominant defect observed in the photoluminescence (PL) of room-temperature electron-irradiated ZnO by optical detection of electron paramagnetic resonance (ODEPR) is determined to be the positively charged oxygen vacancy $({V}_{\mathrm{O}}^{+})$. Its spectrum, labeled L3, was previously observed in a $4.2\phantom{…
Squarylium or squaraine dyes are derived from 1,2-dihydroxycyclobuten-3,4-dione, otherwise known as squaric acids. They are two principal types: the 1,2-bisdonorsubstituted derivatives, and the 1,3-bisdonorsubstituted derivatives. The former are essentially merocyanines and have no distinctive properties, whereas the…
The change of work function of the Ag (111) surface induced by the physisorption of ethylene and its derivatives, vinyl chloride and butadiene, is examined with density functional theory (DFT) calculations employing a generalized gradient approximation for the exchange correlation functional. It is found that the calc…
We investigate static charge and spin density modulation patterns along a ferromagnet/semiconductor single junction quantum wire in the presence of spin-orbit coupling. Coherent scattering theory is used to calculate the charge and spin densities in the ballistic regime. The observed oscillatory behavior is explained…
A new series representation of the Madelung constant is given. We represent Madelung constant as a sum of an exact term plus an exponentially fast converging series. The remarkable result is that even if the series part is discarded, one obtains Madelung constant correct up to ten good decimal figures. This, to the be…
The domain structures of ceramics with the morphotropic phase boundary (MPB) composition 0.68PFW–0.32PT were analysed in situ by TEM as a function of temperature from 16 to 300 K. A core–shell structure was detected at room temperature, in which the core of the grains was Ti rich and the shell W rich with respect to t…