Materials Literature
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We describe theoretically the process of multi-beam reflection in a two-dimensional electron system with a lateral potential barrier. Due to spin-orbital interaction, the reflection process leads to the formation of three beams with different spin polarizations. The efficiency of spin conversion can become small for s…
We report the influence of external pressure (P= up to 8 GPa) on the temperature dependence of electrical resistivity of a Yb-based Kondo lattice, YbPd2Si2, which does not undergo magnetic ordering under ambient pressure condition. There are qualitative changes in the temperature dependence of electrical resistivity d…
In this work the mechanism of Li insertion/intercalation in the anode materials InSb and Cu$_2$Sb is investigated by means of the first principles total energy calculations. The total charge densities for the lithiated products of the two compounds are presented. Based on these results the change in the bonding charac…
We present an exact solution for electronic Raman scattering in a single-band, strongly correlated material, including nonresonant, resonant and mixed contributions. Results are derived for the spinless Falicov-Kimball model, employing dynamical mean field theory; this system can be tuned through a Mott metal-insulato…
The combination of Finite Element Method (FEM) simulation and experimental photo-elasticity provides both qualitative and quantitative information about the stress field in a polymer composite and particularly along the fibre-matrix boundary. Investigations were made using model specimens containing up to five paralle…
SiC is a robust semiconductor material considered ideal for high-power application due to its material stability and large bulk thermal conductivity defined by the very fast phonons. In this paper, however, we show that both material-interface scattering and total-internal reflection significantly limit the SiC-nanost…
We show that thermal effects play a relevant role in the determination of the electron-phonon couplings based on the intensity of the phonon-shakeup peaks in photoemission spectra. In particular, we re-consider the determination of the electron-phonon couplings of fullerene based on a fit of the photoemission spectrum…
A large number of polycrystalline materials, both manmade and natural, display preferred orientation of crystallites. Such alignment has a profound effect on anisotropy of physical properties. Preferred orientation or texture forms during growth or deformation and is modified during recrystallization or phase transfor…
Abstract For Abstract see ChemInform Abstract in Full Text.
Abstract Redox reactions of dodecacarbonyltetrarhodium(0), Rh4(CO)12, with 9,10-phenanthraquinone derivatives gave novel one-dimensional rhodium(I)–semiquinonato complexes. Two typical linear chain structures with direct Rh–Rh contacts were determined by X-ray crystal structure analyses of the compounds.
Abstract The precipitation kinetics of zinc sulfide were studied using a lab scale mixed‐suspension‐mixed‐product‐removal (MSMPR) precipitation reactor. The vessel was operated at different feed concentrations, molar ratios, stirrer speeds, pH‐values, feed injection positions and residence times. Primary nucleation an…
Abstract In order to grow benzophenone single crystal, an organic nonlinear optical material, a cost‐effective Vertical Bridgman‐Stockbarger system has been designed and fabricated by employing a two‐zone, transparent furnace made out of immiscible liquids. Transparent, optical quality benzophenone single crystals wer…
Crystal plasticity finite element (CPFE) models are useful tools in modelling the anisotropic stress–strain responses in large deformation of polycrystalline metals. In this study, a CPFE model is applied to simulate the evolution of crystallographic textures during cold rolling of hot-rolled aluminium plates and duri…
Porous Ge thin films (see Figure) have been prepared using low-pressure, inductively coupled plasma chemical vapor deposition. Au nanoparticles are used as catalysts to initiate the protrusion of Ge nanotips from the surface of the substrate. After removing the catalysts during growth, the Ge nanotips coalesce togethe…
Abstract Although molecule‐based materials can combine physical and chemical properties associated with molecular‐scale building blocks, their successful integration into real applications depends also on higher‐order properties, such as crystal size, shape, and organization. New approaches involving templating and se…
The synthesis and characterization of an ultra-thin palladium nanocoating in the channels of a mesoporous silica material, designated as Pd-SBA, is described. In the preparation of this new material, Si–H functional groups were introduced directly into the channel of an SBA-15 mesoporous material, eventually resulting…
A process to synthesize silica mesoporous capsules is reported (see Figure), where mineralization takes place at the oil–water interface of reverse emulsion droplets. The capsules exhibit an homothetic morphology. Simple scaling analysis reveals that mineralization takes place above a well-defined hydrolyzed precursor…
Complexing deprotonated trihydromethylethane with iron(III) leads to the formation of a tetranuclear iron cluster (see Figure) with a S = 5 spin ground state and a appreciable magnetic anisotropy. Low-temperature investigations demonstrate single molecule magnet behavior and resonant tunneling within the ground state.
A unique method of material synthesis based on vacuum co-deposition is reported. A Eu complex was formed by co-deposition of bis(dipivaloymethanato)europium (Eu(DPM)3) and 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), which both showed excellent volatility during vacuum deposition. Photoexcitation of the BCP le…
The monoborohydride lanthanide complex [Sm(Cp*)2(BH4)(thf)] (1a) (Cp* = eta-C5Me5), has been successfully used for the controlled ring-opening polymerization of epsilon-caprolactone (epsilon-CL). The organometallic samarium(III) initiator 1 a produces, in quantitative yields, alpha,omega-dihydroxytelechelic poly(epsil…