Materials Literature
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Abstract Silicon alkoxides sol-gel pre-treatments act as coupling agents between metal substrates and organic coatings. This kind of metal finishing is widely studied pre-treatment, but relatively little study is done on the effect of this sol-gel pre-treatment on the durability and on the corrosion protection propert…
Using a hydrochemical simulation, temperature dependency of single-bubble sonoluminescence (SL) in a concentrated solution of sulfuric acid has theoretically been studied. With calculating the phase diagrams of an SL bubble in the solution of 85% acid, maximum acquirable SL emissions at different ambient temperatures…
Micro-tubular solid oxide fuel cells (MT-SOFCs) are a much smaller version of larger tubular SOFCs. They are operational within seconds and allow a higher power density per volume than the larger version. Hence they are a potential technology for automotive, auxiliary and small scale power supply devices. In this stud…
The dependence with Ga content ( x ) of structural, magnetic, and hyperfine properties of Ga x Fe 4– x N compounds has been studied using the full-potential linearized augmented planewave method based on density functional theory. A nonlinear increase of the lattice parameter with x was observed, ascribed to the diffe…
An Sb-rich (48 at.%) Si-Sb-Te phase-change material with moderate Si content (24 at.%) is proposed for phase-change random access memory (PCRAM) applications. The real time amorphous to crystalline transformation was studied by in situ transmission electron microscopy observations and in situ resistance measurements.…
Extensive computational investigations along with additional quasielastic neutron scattering data were used to obtain a consistent picture of the extensive fluxionality of hydride and dihydrogen ligands in Fe(H)(2)(H(2))(PEtPh(2))(3) over a wide range of temperatures from 1.5 to 320 K. We were able to identify three d…
Optical trapping and driving of small objects has become a topic of increasing interest in multidisciplinary sciences. We propose to use a chain made of metallic nanoparticles as a resonant light sail, attached by one end point to a transparent object and propelling it by the use of electromagnetic radiation. Driving…
The evolution of hydrolyzed alkoxide–carboxylate sol–gel precursor solutions of barium titanate was investigated by time-resolved small-angle X-ray scattering (SAXS) and viscosity measurements. Sols were prepared from titanium(IV) iso -propoxide in 2-methoxyethanol and barium acetate in acetic acid. Analysis of the ex…
Batch adsorption studies were conducted to remove cutting oil from wastewater using activated lemon (species Citrus x limon) peels. The effect of various important parameters, namely, pH, dose of adsorbent, contact time, mixing speed, and initial oil concentration, and their optimum conditions for maximum sorption eff…
We provide nanoscale evidence of the role of sheath exopolymers in the silicification of the sheathed cyanobacteria Calothrix. Electron microscope observations of silicified Calothrix cells revealed that silica accretes directly onto EPS sheath fibrils to produce an open web of silica particles that could remain perme…
Abstract The rheology/morphology relationship of plasticized and nonplasticized ethylene–propylene–diene–terpolymer/polypropylene (EPDM/PP) TPOs was studied. The aim was to investigate the effect of a plasticizer on the morphology, specially on the co‐continuity interval of these blends. The addition of a plasticizer…
We investigated the effect of charged domain boundaries (CDBs) on the coercive voltage (Vc) in polycrystalline Pb(Zr0.25Ti0.75)O3 (PZT) thin films using angle-resolved piezoresponse force microscopy (AR-PFM). By using the AR-PFM technique, we could observe the detailed domain structure with various degrees of CDBs inc…
A series of nickel(II) complexes of a 2,6-dihydroxynaphtho-1-aldehyde Schiff base was synthesized. By means of in situ formation of metal-containing tectons, some of those complexes afforded sub-millimeter-scale single crystals directly from the reaction mixture. The complexes consisted in part of various ladder-like…
Abstract BACKGROUND: The poly(3‐hydroxybutyrate)—P(3HB)—is a polyester synthesized by many bacteria and stored as an energy reserve material in the cell cytoplasm as water‐insoluble inclusions. The aim of this research was to present a mathematical modeling approach in order to describe the culture kinetics of the bac…
Based on a shell model potential obtained from first principles calculations, we performed molecular dynamics simulations to investigate the electromechanical response of a ferroelectric perovskite under finite temperature and electric field. We characterize the switching paths by which a homogeneous polarization reor…
The performance of tip-enhanced Raman spectroscopy (TERS) largely depends on probe optimisation. An electrochemical etch using nitric acid and ethanol produces sharp silver probes with radius of curvature between 20 and 60 nm. Optimisation also identified controllable tapers; rough or smooth. Boundary element method s…
We used a polymer network to improve the response time of a vertical aligned (VA) mode liquid crystal display (LCD). The polymer network was anisotropic and was oriented in the same direction as the liquid crystal in the dark state. We studied the effect of pretilt angle and polymer concentration and measured the tran…
Although the quasi-Heusler compound Fe3Si is a promising candidate for spintronics applications, its combination with the reactive GaAs surface is problematic, since it deteriorates its beneficial attributes due to a large amount of interdiffusion at the Fe3Si/GaAs interface. Here, we show the epitaxial growth of Fe3S…
The structural and magnetic properties of dinuclear [Co(II)(NCMe)(5)Co(II)(NCS)(4)]·MeCN have been investigated. The structure consists of an octahedral Co(II)(NCMe)(5) center connected to a tetrahedral Co(II)(NCS)(4) center bridged by a μ(1,3)-NCS(-) ligand. The bridging NCS(-) weakly couples the pair of S = (3)/(2)…
Abstract Polylactic acid/ethylene glycol triblock copolymer (LLA 46 EG 46 LLA 46 ) was prepared and used in a crosslink process of epoxidized natural rubber (ENR) by employing a ring‐opening reaction using Sn(Oct) 2 as a catalyst. The OH‐capped copolymer acts as a macromolecular crosslinking agent in the formation of…