Materials Literature
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Chemically modified graphenes (CMGs) are unique building blocks for “bottom up” nanotechnology because of their single-atom thickness, two-dimensional conjugated structure, and exceptional physical and chemical properties. Various hierarchical structures and functional nanocomposites based on CMGs have been prepared b…
The rapidly increasing production of engineered nanoparticles has raised questions regarding their environmental impact and their mobility to overcome biological important barriers. Nanoparticles were found to cross different mammalian barriers, which is summarized under the term translocation. The present work invest…
We hereby introduce a new hybrid thermodynamic-structural approach to the coarse-graining of polymers. The new model is developed within the framework of the MARTINI force-field (Marrink et al., J. Phys. Chem. B, 2007, 111, 7812), which uses mainly thermodynamic properties as targets in the parameterization. We refine…
Abstract EuCO 3 OH microspheres have been successfully prepared using a facile hydrothermal approach, by using urea as the precipitant without the assistance of any surfactants or templates. Several experimental parameters were examined, such as the reaction temperature, the reaction time, and the molar ratios of the…
The resistivity ρ(PEM) of polyelectrolyte multilayers (PEMs), PEI(PSS/PAH)(24), PEI(PGA/PAH)(12), PEI(HA/PLL)(12) and PEI(PSS/PLL)(12), in a free-hanging configuration was estimated combining electrochemical impedance spectroscopy (EIS) and atomic force microscopic (AFM) images. Surprisingly, the obtained value of sev…
The study of bimetallic catalysts has scientific and technologic importance because of special catalytic activity towards several reactions. RhCu is an interesting bimetallic system due to combination of the very different catalytic activities of Rh and Cu. The catalytic activity of this bimetallic does not result fro…
Abstract Strontium‐doped lanthanum manganite (La 1‐x Sr x MnO 3 or LSM) is the material most widely used on solid oxide fuel cells cathode. In this work, nano‐scale La 0.8 Sr 0.2 MnO 3 powders have been synthesized by polymeric precursor‐based methods using different polymerizing agents with the aim of evaluating the…
<div class="section abstract"><div class="htmlview paragraph">With the increasing use of ethanol blended motor fuels around the world, vehicle manufacturers as well as ethanol producers and distributors are interested in understanding ethanol's effects on materials corrosion. More specifically, General Mot…
<div class="section abstract"><div class="htmlview paragraph">Under on-road driving conditions, the engine load and speed and the cooling effect of ambient air may affect the functioning of exhaust aftertreatment devices. In this paper, we studied the effects of these parameters on the functioning of the c…
Big spin! In the presence of 2-aminopropane-1,2-diol, the reaction of 1,1,1-tris-(hydroxylmethyl)propane and [Mn(acac)2] in MeCN yielded a novel ring-like octadecanuclear mixed-valence manganese cluster complex, which exhibits an overall ferromagnetic property and possesses a large spin ground state of 20.
<div class="section abstract"><div class="htmlview paragraph">The aftertreatment challenge in the non-road market is making the same system work and fit not just in one machine, but in hundreds of different machines, some of which can be used for many different purposes. This huge diversity of applications…
Field and temperature dependences of the magnetic and transport properties of single crystals of ${\text{BaFe}}_{2+x}{\text{Ru}}_{4\ensuremath{-}x}{\text{O}}_{11}$ $(x=0.5,0.9,1.4)$ R-type ferrites are reported. A wide homogeneity range of Ru/Fe compositions allows to tune the strength of the anomalous Hall effect (AH…
Molecular dynamics (MD) simulations were used to study the structural and dynamic properties of multilayer adsorption of each of three halomethanes, CF(4), CF(3)Cl, and CF(3)Br, adsorbed onto the (001) surface of either of two atomically flat but chemically and structurally different substrates (graphite and hydroxyla…
Abstract Influences of the different annealing ambient (in air, 1 bar, 2 bar, 3 bar and 4 bar oxygen partial pressure) on the titanium dioxide (TiO 2 ) thin films deposited on soda lime glass by standard radio frequency (rf) magnetron reactive sputtering method at 100 watt were investigated by means of X–ray diffracto…
Small titanium-aluminum oxide clusters, TiAlO(y) (-) (y=1-3) and TiAl(2)O(y) (-) (y=2-3), were studied by using anion photoelectron spectroscopy. The adiabatic detachment energies of TiAlO(y) (-) (y=1-3) were estimated to be 1.11±0.05, 1.70±0.08, and 2.47±0.08eV based on their photoelectron spectra; those of TiAl(2)O(…
Abstract Based on the defect models that the two tetragonal Cu 2+ centers in KTaO 3 are due to Cu 2+ ions at Ta 5+ sites associated, respectively, with one and two oxygen vacancies ( V 0 ) along C 4 axis because of charge compensation, the spin‐Hamiltonian parameters ( g factors g ‖ , g ⊥ and hyperfine structure const…
White light-emitting diodes (white LEDs) are of great interest, particularly for their promising applications to solid state light-ning. White LEDs have advantages over conventional electrical lightning including high efficiency, long lifetime and low energy consumption.
Abstract Amorphous carbon films were prepared in a magnetron sputtering system at different d.c. negative substrate biases (−50, − 100, − 150, − 200 and − 250 V). The surface roughness, hardness and tribological properties of as‐deposited films were investigated based on the films' structural evolution. Compared with…
Alumina–titania ceramic membrane with mesopore and narrow pore size distribution was prepared by the sol–gel process. Observations were based on membrane weight loss, morphology, pore size distribution and BET surface area. Thermogravimetric analysis (TGA), Scanning Electron Microscopy (SEM) and N2 adsorption-desorpti…
Density functional theory calculations have been performed to study the combined interaction of oxygen and chlorine with the Cu(100) surface. We found the presence of atomic chlorine increases the stability of molecular oxygen adsorption, and that the barrier required to dissociate the oxygen molecule in the presence…