Materials Literature
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The thermoelectric properties of P-doped Mg 2 Si [Mg 2 Si:P=1: x (0.0005≦ x ≦0.03)] fabricated by spark plasma sintering have been characterized by Hall effect measurements at 300 K and by measurements of electrical resistivity (ρ), the Seebeck coefficient ( S ), and thermal conductivity (κ) between 300 and 900 K. P-d…
We have measured and analyzed x-ray photoelectron spectra (XPS) of as-grown and annealed Ge33As12Se55 films compared with bulk material. We found that the as-grown film contains a large number of separated Se clusters which can coalesce with As and Ge after annealing at high temperatures. In addition, both the Ge and…
A 2D negative-refractive index metamaterial is proposed and investigated, which is composed of a parallel-plate waveguide loaded with a square lattice of disc-type dielectric resonators. Collective and macroscopic behavior of the dielectric resonator lattice under the fundamental TE resonance gives negative effective…
The growth and collapse of laser-induced vapor cavities inside axisymmetric free-falling liquid water jets have been studied. Bubbles of different size are generated at various distances from the jet axis and the effects on the jet interface are recorded by means of ultrafast cinematography. The configuration is chara…
In the present investigation, carbothermal synthesis technique is used for the production of ZrB2 whiskers. The synthesis is carried out by heating the mixture of ZrB2, H3BO3 and carbon black over the temperature range of 1300 to 1700°C in argon atmosphere. Different elements such as Ni, Co and Fe are tested for their…
Abstract This paper deals with the graft co-polymerisation of methylmethacrylate (MMA) onto flax fibre under the influence of microwave radiation (MWR). The graft co-polymers are characterised by FTIR spectroscopy, scanning electron microscopy (SEM), thermal analysis (TGA/DTA) and X-ray diffraction (XRD). Graft co-pol…
We demonstrate a novel phase change memory cell utilizing doped Ge nanowire pn-junction diode both as a bottom electrode and a memory cell selection device. This memory cell can be used for a cross-point memory array with diode selection. Using selective growth of isolated vertical nanowires in each cell, we have mini…
The crystal‐melt equilibria in complex 15‐component‐simulated high‐level waste (HLW) glass melts are modeled based on quasicrystalline concepts that are discussed in Part I. A pseudobinary phase diagram between a transition metal ferrite spinel (an incongruent melt product of a transition metal iron‐rich acmite) and n…
Gold with a nanoporous sponge-like morphology, generated by leaching of AuAg alloys is presented as a new unsupported material system for catalytic applications. The role of residual silver for catalytic activity towards CO oxidation in the temperature range from −20 to 50°C has been investigated by comparison with Au…
We have measured the temperature dependence of the thermal conductivities of Ge 2 Sb 2 Te 5 (GST) and ZnS–SiO 2 using a nano second thermoreflectance measurement system from room temperature to 500–600 °C. The specific heat capacities of these materials also have been determined from -130 to 500 °C for GST and from ro…
Field data for the corrosion of structural steel in the tidal and near-shore marine atmospheric zones taken from a variety of sources are reexamined and then interpreted in the light of a phenomenological model recently proposed for marine immersion corrosion loss. That model predicts a relatively short initial period…
The solubility of drugs in water is investigated in a series of papers. In this work, we address the process of bringing a drug molecule from the vapor into a pure drug amorphous phase. This step enables us to actually calculate the solubility of amorphous drugs in water. In our general approach, we, on one hand, perf…
Macroscopic and macromolecular material design and their influence on hydrolysis mechanism of poly(ϵ‐caprolactone) (PCL) was evaluated. Homogenous discs of linear PCL, porous scaffolds of linear PCL and crosslinked PCL networks were subjected to hydrolytic degradation for up to 364 days in 37°C and pH 7.4 phosphate bu…
Abstract A mineralogical and microtextural study of Somosaguas Miocene deposits, located in the Madrid Basin (western Madrid, Spain), was carried out using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and optical microscopy, whereas crystal chemistry data were obtained by analytica…
The pharmacy is one of the most important areas in which the macromolecular compounds are applied. They are used as pharmacological substances, blood substitutes, various auxiliary materials or excipients as well as in the production of macromolecular prodrugs, polymeric drug delivery systems, therapeutic systems, etc…
Dendrimers are a new class of artificial macromolecules with well-defined hyperbranched structures which enable bio-active molecules such as drugs to be presented in a highly multi-valent fashion. Covalent conjugation of drugs to the surface of dendrimers can be easily achieved either by direct chemical reactions betw…
Using the first-principles method based on the density functional theory, we studied the ferromagnetic stability and electronic structure of (Al, Cu) N. The Cu dopants were found spin polarized and the calculated band structure suggested a 100% polarization of the conduction carriers. The ferromagnetic ground state in…
Accurate calculation of peak and % 2nd harmonic of inrush current is critical to appropriate selection of relay protection of a power transformer. In this paper, a description is given of a rigorous calculation of magnitude and wave-shape of inrush current as a function of the transformer design parameters as well as…
Analysis of the experimental optical spectra of CuO nanoparticles with the electronic structure characterized by strong electron correlations has revealed the appearance of unusual states inside the band gap. The intragap states and the specific features of the electronic structure of CuO nanoparticles are discussed i…
A new technique for partial discharge (PD) source location in cable systems is presented in this paper. Such technique, here referred to as amplitude-frequency (AF) mapping, is based on the influence of attenuation and dispersion phenomena on PD pulse time and frequency characteristics. A comparative evaluation with o…