Materials Literature
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A tomographic study of electrochemical cells to observe scales formed on inert anodes has been conducted using energy-dispersive synchrotron X-ray diffraction. This study is preparatory to an investigation that will observe this formation in situ during the cells' operation. The purpose of the current work was to dete…
The present paper concerns with the concept of the strain rate intensity factor in rigid plastic solids. The strain rate intensity factor is the coefficient of the principal singular term in the expansion of the equivalent strain rate in a series in the vicinity of maximum friction surfaces. Such singular velocity fie…
Different TiO 2 and SiO 2 nanoparticles have been tested concerning their toxicity on selected mammalian cell lines. Various powders and suspensions, all of which consist of titanium or silicon dioxide nanoparticles have been examined. These particles differ in the crystal structure, the size and the BET-surface area.…
The crystal structure and ferroelectric properties of (1− x )(Bi 0.5 Na 0.5 )TiO 3 – x Ba(Zr 0.05 Ti 0.95 )O 3 (BNBZT x, x ≤12%) lead‐free piezoelectric ceramics were studied. The distance between the centers of cations and anions ( d c–a ) as well as the lattice parameters was carefully investigated by Rietveld refin…
We consider the spectrum of the Fibonacci Hamiltonian for smallvalues of the coupling constant. It is known that this set is aCantor set of zero Lebesgue measure. Here we study the limit, as thevalue of the coupling constant approaches zero, of its thickness andits Hausdorff dimension. We announce the following result…
Abstract A microbial cellulose film (pellicle), prepared by Acetorbactor xylinum , is a supramolecule system, absorbing a huge amount of water (99% by weight). To elucidate the affinity to water, we investigated the hierarchical structure in a pellicle by using ultra‐small‐angle and small‐angle neutron scattering, obs…
Sensitization and binding of a large footprint pyrene chromophore to planar (sapphire) and colloidal metal oxide films (TiO2 and ZrO2) is investigated. The model compound combines a 1-pyrenyl-ethynylenephenylene unit with a new adamantane-tripodal linker that binds to the surface. The linker design, combining a large…
The chemisorption of ${\text{C}}_{2}{\text{H}}_{2}$ and ${\text{C}}_{2}{\text{H}}_{4}$ on Si(100) is re-examined by first-principles calculations to sort out the relative importance of the intradimer di-$\ensuremath{\sigma}$ and interdimer end-bridge structures. Based on reactive trajectories calculated by ab initio m…
The aim of this study is life prediction of IN738 LC gas turbine blade via Larson- Miller parameter method and fulfilment of some systematic metallographic, creep and hardness tests. Various calculative methods of remaining life prediction have been considered and Larson-Miller parameter method is used in order to pre…
Surface-enhanced Raman spectroscopy (SERS) has lagged behind other analytical techniques utilized in routine chemical analyses despite the information-rich spectra produced. This can be attributed in part to the difficulties in finding effective substrates that provide high sensitivity and highly reproducible SERS res…
A novel method for the analysis of Gadolinium-based contrast agents in complex clinical matrices is presented. Three commonly applied ionic contrast agents for magnetic resonance imaging were separated by CE and detected by ESI-MS. Blank urine samples were spiked with Dotarem (Gd-DOTA, Gadolinium-1,4,7,10-tetraazacycl…
The dielectric properties of nanocomposites composed of epoxy resin host and aluminum nitride (AlN) and boron nitride (BN) nanofillers have been studied in the frequency domain from 10-2to 106Hz at different temperatures. The introduction of the ceramic AlN and BN nanoparticles into the epoxy resin is described step b…
Nonlinear optical properties of Si nanocrystals (Si-ncs) doped SiO2 prepared by a cosputtering method were studied by z-scan technique in a femtosecond regime at around 1.6 eV. The nonlinear refractive index (n2) and nonlinear absorption coefficient (β) were strongly enhanced compared to those of bulk Si and found to…
Because of exceptional mechanical, chemical, and tribological properties, diamond has a great potential to be used as a material for the development of high-performance MEMS and NEMS such as resonators and switches compatible with harsh environments, which involve mechanical motion and intermittent contact. Integratio…
Polypropylene/nanometric zinc oxide (PP/nanoZnO) composites at 1 wt% nanoZnO content were prepared using melt blending method using a thermo Haake internal mixer. Three different types of zinc oxide (ZnO) with different morphologies were used as fillers. Each composite was subjected to characterization analyses includ…
Thermal conductivity of copper and tungsten nanowires, copper damascene structures are modeled theoretically on the basis of Boltzmann transport equation. The size-dependent thermal conductivities of the nanowires are obtained by taking into account interface scattering, grain boundary scattering, and interface roughn…
The crystal structure of thin lead sulfide (PbS) films fabricated by hydrochemical deposition is studied by X-ray diffraction analysis. It is established that both the synthesized PbS films and the same films annealed in the temperature interval of 293–423 K have a cubic (space group Fm $$ \bar 3 $$ m) crystal structu…
In this study, we propose and confirm an accurate estimation method of iron loss in rotating machines. In the method, the eddy-current loss in the electrical steel sheets is directly calculated by a nonlinear time-domain electromagnetic field analysis with a simple approximation of the excess loss. The hysteresis loss…
Fabrication of oxide fiber composites is accompanied by the development of drying cracks in the matrix following slurry infiltration. The cracks are a result of the inherent shrinkage in particle compacts during drying coupled with the mechanical constraints imposed on the matrix by the fibers. The effects are most pr…
The magnetic and transport characteristics of substitutional solid solutions of the Tm1−x Yb x B12 rare earth dodecaborides have been investigated. The measurements performed in the wide temperature range 1.8−300 K on the high-quality single-crystalline samples make it possible to conclude that as x increases, antifer…