Materials Literature
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As more and more structures of macromolecular complexes get solved in different conditions, it has become apparent that flexibility is an inherent part of their biological function. Normal mode analysis using simplified models of proteins such as the elastic network model has proved very effective in showing that many…
In this Communication we report about the unexpected effect of ruthenium doping in sodium ligthly-doped manganites. This effect seems to be in contrast with the usual model applied to describe the effect of this magnetic ion into the manganite structure. We propose a possible compensation mechanism which seems also ab…
In this communication the enhancement of low temperature magnetoresistance in polycrystalline La1-xCaxMnO3 manganites is discussed. It is shown that so-called grain boundary effects seem to be the simplest and natural explanation of this phenomenon.
This study evaluates the feasibility of a new class of partially restrained connections using shape memory alloys. In the martensitic form, shape memory alloys (SMAs) have the ability to recover large residual deformations by heating the alloy above its transformation temperature. The proposed connection consists of f…
Abstract In this review, the recent achievements in the synthesis of inorganic nanomaterials inside the spatially confined volume of individual micro‐ and submicroreactors (emulsions, micelles, organized thin films, polyelectrolyte capsules, etc.) are presented. The advantages and shortcomings of each type of microrea…
The behavior of carbon and nitrogen atoms in iron based solid solution is studied by ab initio density-functional-theory calculations. The interaction of a C or a N atom in $\ensuremath{\alpha}$-Fe with a vacancy, other C or N interstitials as well as self-interstitial atoms is discussed and compared to known experime…
Systematic experimental data on resonant inelastic X-ray scattering (RIXS) in GaN near the N K-edge are presented for the first time. Excitation energy dependence of the spectral structures manifests the band structure effects originating from momentum selectivity of the RIXS process. This finding allows obtaining k-r…
Superconducting thin films of magnesium diboride (MgB$_2$) were prepared on MgO (001) substrate by a molecular beam epitaxy (MBE) method with the co-evaporation conditions of low deposition rate in ultra-high vacuum. The structural and physical properties of the films were studied by RHEED, XRD, XPS, resistivity and m…
Electronic and structural properties of ultrathin MgO layers grown on epitaxial Fe(110) films were investigated at room temperature by means of spin-resolved photoelectron spectroscopy, Auger-electron spectroscopy, and low energy electron diffraction. The spin polarization at the Fermi level of the Fe(110) film decrea…
The title compound, [Zn(C44H28N4)(C2H6OS)]·0.79C2H6OS·0.21CHCl3, crystallizes as a sulfoxide–chloroform true clathrate. The main residue, (dimethyl sulfoxide)(tetraphenylporphyrinato)zinc(II), is a five-coordinate zinc–porphyrin complex, with dimethyl sulfoxide as an axial ligand. The crystal structure is charac…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTDevelopment of a Set of Simple Bacterial Biosensors for Quantitative and Rapid Measurements of Arsenite and Arsenate in Potable WaterJudith Stocker, Denisa Balluch, Monika Gsell, Jessika Feliciano, Sylvia Daunert, Khurseed A. Malik, and Jan Roelof van der Meer*Ci…
The simultaneous catalytic reduction of both NO X and N 2 O in excess O 2 using propene as the reductant was studied in the absence and in the presence of 10% H 2 O and 50 ppm SO 2 . Reduction took place in a dual-bed catalytic reactor consisting of In/Al 2 O 3 in the upper layer and of Ru/Al 2 O 3 in the lower one. T…
Optical recording and luminescence readout of novel covalently linked photochrome/luminophore supramolecular complexes has been demonstrated by near-field scanning optical microscopy (NSOM). Localized UV irradiation of these complexes dispersed in polymeric matrices resulted in photoinduced state switching and a conco…
Living polymers formed by reversible association of spacers (oligomers) terminated by one donor and one acceptor group at the ends are studied by means of Monte Carlo simulations (using the bond-fluctuation model). To account for the different chemical nature of the associating groups and spacers, we considered three…
Infrared spectroscopy is used to study trapped and physisorbed CO2 in single-walled carbon nanotube bundles (SWNTs) synthesized by the HiPco process. CO2 is entrapped within the SWNTs by acid oxidation of the unpurified sample followed by vacuum heating to 700 K. The trapped CO2 has a single nu3 mode at 2327 cm-1, is…
The confinement of polymer melts in nanoscopic pores leads to chain dynamics significantly different from bulk behaviour. This so-called 'corset effect' occurs both above and below the critical molecular mass and induces dynamic features as predicted for reptation. The confined-to-bulk dynamics crossover is treated an…
Both hexagonal and cubic films were grown on c -plane (0001) sapphire substrate at low temperature. X-ray diffraction measurements show that the cubic Mg x Zn 1− x O films grow along the [111] direction while the hexagonal ZnO films grow along [0001]. The temperature-dependent optical properties of Mg x Zn 1− x O film…
The first nonaqueous conditions are described for catalytic asymmetric epoxidation mediated by iminium salt organocatalysts, providing ee values of up to 67%.
The production of diphenyl carbonate (DPC) by the transesterification of dimethyl carbonate (DMC) with phenol was performed using a variety of solid catalysts. Mg−Al-hydrotalcite was found to have a high activity for this transesterification. A 14.7% yield of DPC and an 11.6% yield of methylphenyl carbonate (MPC) base…
Na 0.5 Bi 0.5 TiO 3 (NBT) nanowhiskers with diameters of 20 nm and lengths of 300 nm have been prepared at low temperature by using a sol–gel–hydrothermal technique, which combined the conventional sol–gel process and the hydrothermal method. The reaction conditions such as alkali concentration and temperature were in…