Materials Literature
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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…
The thermoelectric properties of quaternary type-I clathrate compounds, Ba8Ga16−xInxGe30 (x=0–9), have been investigated as a function of In content and temperature. The substitution of In atoms for Ga atoms leads to a decrease in electrical resistivity, as well as a decrease in thermal conductivity. The decrease in e…
A simple and scalable drawing–drying process for spinning pure double walled carbon nanotube (DWNT) fibers out of DWNT cotton is reported (see figure). Fibers with lengths up to tens of centimeters can be spun, and these fibers possess high mechanical strength. Field emission and electrochemical tests performed on ind…
The conformational behavior of poly[2-(methacryloyloxy)ethyltrimethylammonium chloride] (PMETAC) brushes with different chain density in the presence of large benzyltributylammonium chloride (BTBAC) ions has been studied by a Quartz Crystal Microbalance with Dissipation (QCM-D) and Scanning Force Microscopy. Dense bru…
The dynamics of adsorption and desorption of uncharged homopolymers have been investigated using a coarse-grained model comprised of a bead−spring chain and a planar surface. Brownian dynamics simulation has been used to examine the adsorption process for polymers released near the surface and with bulk properties as…
Electric double layer field-effect transistors (EDL-FETs) of rubrene single crystals using a liquid polymer electrolyte were studied in a four-probe configuration. The channel sheet resistance and the contact resistance normalized by the contact width were 0.24 MΩ and 0.83 kΩ cm in the ON-state, respectively. These va…
We present here a simple and novel procedure for fabricating silica and silicon oxycarbide uniform capsules with a hollow macroporous core/mesoporous shell structure. This method is based on the infiltration of sub-micrometer-size solid core/mesoporous shell silica particles with polycarbomethylsilane.
Thermoelectric thin film micro-devices with high packing densities of thermoelectric legs are of high demand in micro-systems for self-standing and so called waste energy self-powered sensor systems for wireless data transfer. One technical solution for such micro-devices is offered by the Micropelt technology. The re…
Isothermal compression experiments on multidomain [001] oriented and poled ferroelectric rhombohedral PZN-0.07PT and PMN-0.30PT single crystals revealed elastic instabilities corresponding to zero field ferroelectric-ferroelectric phase transition under mechanical compression. The application of an appropriate dc bias…