Materials Literature
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Tailor welded blanks (TWBs) are produced by joining at least two sheets of dissimilar gauge and/or properties to achieve a lighter blank of desired stiffness and strength. In this way, the properties of the blank may be tailored to meet the design requirements of a panel. As in steel structures, cost and weight can be…
Single crystals of BaAl2Si2 were grown from an Al molten flux and characterized using single-crystal X-ray diffraction at 10 and 90 K and neutron diffraction at room temperature. BaAl2Si2 crystallizes with the alpha-BaCu2S2 structure type (Pnma), is isostructural with alpha-BaAl2Ge2, and is an open 3D framework compou…
Various silicon nanostructures (twofold chevrons and three- and fourfold spirals) were grown on silicon [111] substrates prepatterned with a two-dimensional square lattice of blocks with different block size and periodicity via ion beam induced glancing angle deposition at room temperature, in combination with a contr…
Nanohole arrays in Ni films have been prepared by a replica/antireplica method based on anodic alumina membranes. The nanohole arrays exhibited long range ordering with hexagonal symmetry, the hole distance was kept constant (105nm), and the hole diameter and the film thickness were varied between 50 and 70nm and 55 a…
The microwave absorption of an ensemble of single-domain nanoparticles of La0.7Sr0.3MnO3 is investigated in the temperature range 5–300K. At low temperatures the resonance spectra demonstrate the appreciable increase in linewidth and downward shift of the resonance field which are typical for superparamagnetic resonan…
The structure and phase composition of Al-Zn, Al-Mg, and Al-Mg-Zn alloys were studied before and after severe plastic deformation of these alloys. The deformation was performed by high pressure torsion with true strain of ∼6. It was established that, as a result of severe plastic deformation, the grains of Al and Zn a…
Porphyrin-2,3-diones and porphyrin-2,3,7,8- and porphyrin-2,3,12,13-tetraones were shown to have a redox-active unit that can function independently of the macrocycle at large. Electroreduction of 5,10,15,20-tetrakis(3,5-di-tert-butylphenyl)porphyrin-2,3-diones [(P-dione)M] and the corresponding -2,3,12,13-tetraones […
Abstract Summary: The scaling concepts for isolated flexible macromolecules in good solvent grafted with one chain end to a flat surface (“polymer mushrooms”) as well as for layers of many overlapping end‐grafted chain molecules (“polymer brushes”) are introduced. Monte Carlo attempts to test these concepts are briefl…
The C21-steroidal glycoside auriculoside A (1), recently isolated from the roots of Cynanchum auriculatum, was found to inhibit the growth of several human tumor cell lines and to induce apoptosis in human breast cancer (MCF-7) cells. Compound 1 was evaluated for its in vitro cytotoxicity against MCF-7, HO-8910, and B…
In the field of the metallic alloy development, the main industrial goals are the control of the metallurgical structure and defects. Hydrodynamic movements in the liquid phase have a significant influence on properties of the solidified product. We focus our attention on two major effects influenced by forced convect…
A homologous series of U‐shaped dimeric liquid crystals in which two mesogenic groups are connected via catechol has been prepared and the effects of terminal alkyl chains, alkyl spacers and core structures on the transition properties investigated by means of optical microscopy and differential scanning calorimetry.…
We fabricated magnetic tunnel junctions (MTJs) with a Co-based full-Heusler alloy thin film of Co2MnGe (CMG) and a MgO tunnel barrier. The microfabricated MTJs with a Co-rich CMG film showed relatively high tunnel magnetoresistance ratios of 83% at room temperature and 185% at 4.2K. These values are much higher than t…
Resonance Energy Transfer (RET) plays an important role, both scientifically and commercially, in diagnostics and high throughput screening. For qualitative and quantitative analysis, RET systems are usually assembled through molecular recognition of biomolecules labeled with donor and acceptor luminophores. Lanthanid…
The thermal decomposition and oxidation ageing behaviour of polypropylene (PP) and PP/halloysite nanotube (HNT) nanocomposites were studied. The kinetics of thermal decomposition were calculated by integral models. The thermal oxidation ageing was investigated by Fourier transform infrared spectroscopy (FTIR). The PP…
We present new high‐resolution experimental data on the temperature dependence of the refractive index in the isotropic (I), nematic (N) and smectic A (SmA) phases of the 4‐butyloxyphenyl 4′‐decyloxybenzoate () liquid crystal. From an analysis of the data, using both the Vuks and Neugebauer models for the internal ele…
The thermal conductivity of the ultrathin carbon nanotube with and without an X-shaped junction was investigated using nonequilibrium molecular-dynamics simulations. The ultrathin carbon nanotube exhibits superhigh thermal conductivity. The thermal conductivity of the nanotube with junctions was 20--80% less than that…
We present a first-principle study on the magnetic properties of CrSb in the zinc-blende and NiAs structures. To this end we use all electron full-potential linear augmented plane wave method within both the local spin density and generalized gradient approximations. Various physical quantities, such as total and loca…
Novel multipurpose electrode materials that have various catalytic applications are developed. The materials are composites based on multiwalled carbon nanotubes and electroconducting polymer polyaniline, organized as “fiber in a jacket.” Nanoparticles of metallic platinum and compounds of transition metals are additi…
Polymer molecules of polyvinyl alcohol (PVA) serve as a good Ag+ → Ag0 reducer as well as a template to produce Ag0 nanocrystals of anisotropic shapes. Thin Ag–PVA films (50–100 µm thick) were prepared by carrying out the reaction in aqueous PVA (under heating conditions) and then spin casting the sample in this shape…
Abstract Three dimensional (3D) visualization of nanometer structure of carbon black dispersion in rubbery matrix has successfully been studied and reported in this paper. Use of 3D-TEM, which is computerized tomography combined with transmission electron microscopy (TEM), enabled us to reconstruct 3D images of carbon…