Materials Literature
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Nanoscale fibers with embedded, aligned, and percolated non-functionalized multiwalled carbon nanotubes (MWCNTs) were fabricated through electrospinning dispersions based on melt-compounded thermoplastic polyurethane/MWCNT nanocomposite, with up to 10 wt.-% MWCNTs. Transmission electron microscopy indicated that the n…
Abstract We describe a polycondensation reaction of silica precursors in a modified Stöber‐type basic ethanol solution to produce graded Stokes‐shift core‐shell silica nanoparticles providing bright and spectrally multiplexed sets of fluorescent tags that are excitable using a single excitation source. Dynamic light s…
Copper interconnects have gained wide acceptance in the microelectronics industry due to improved resistivity and reliability compared to Al interconnects. However, there are many challenges with implementation of Cu interconnects at the 32 nm node and beyond, including increased resistivity, integration with porous l…
Abstract Succinic anhydride (SuAh) was polymerized with various α , ω ‐alkanediols from 1,3‐propanediol up to 1,10‐decanediol. Most polycondensations were conducted in bulk at temperatures of 80 °C with bismuth triflate as catalyst and number average molecular weights ( $\overline M _{\rm n} {\rm s}$ , uncorrected SEC…
Corrosion inhibition of copper by tolytriazole (TTAH) in comparison with benzotriazole (BTAH) was investigated in unpolluted and sulfide polluted 3.5 % NaCl. Both TTAH and BTAH give approximately similar results in unpolluted salt water. Electrochemical techniques illustrate that TTAH gives about (40%) higher efficien…
The absorbances of two samples of a bilayer comprising a metal film and a periodically nonhomogeneous sculptured nematic thin film (SNTF) were measured in the Kretschmann configuration, the incident plane waves being linearly polarized with their wave vectors lying wholly in the morphologically significant plane of th…
Polylactides are commonly praised for their excellent mechanical properties (e.g. a high modulus and yield strength). In combination with their bioresorbability and biocompatibility, they are considered prime candidates for application in load-bearing biomedical implants. Unfortunately, however, their long-term perfor…
This paper presents the design and validation process of a supercapacitor storage based light rail vehicle (tramway). The main design aspects of the storage system are described: storage system rating, supercapacitor bank modeling, power electronic converter design and system control and management algorithms. Based o…
The structure and magnetic properties of Cr2O3 and Cr nanoparticles have been investigated. The as-prepared Cr nanoparticles show a core/shell structure, consisting of a Cr core and a thin Cr oxide shell with a thickness of 1.5–2.5 nm. Annealing the Cr nanoparticles in air leads to the formation of Cr2O3 nanoparticles…
We experimentally and numerically studied the transmission spectra of a combined metamaterial structure whose negative refractive index was supposed to be achievable only with simultaneously negative permittivity and permeability. However, it was found that the negativity of the refractive index of such a structure co…
The nominate varieties of the monoraphid diatoms Cocconeis pediculus EHRENBERG and C. placentula EHRENBERG are typified. Discrepancies from common concepts in Ehrenberg's types, habitats and descriptions were discovered which might affect our current understanding of both Cocconeis species. To ensure stabilization of…
The sol-gel process has been found to be successful in applications for the conservation and restoration of stone. However, a well-known drawback of the materials obtained by this process is their tendency to crack during drying inside the pores of the treated stone. In this article, we present an overview of our curr…
Magnetic nanoparticles Fe 3 O 4 were prepared in air environment by the coprecipitation method using molar ratios of Fe 2+ : Fe 3+ = 1: 2. The surface of magnetic nanoparticles was coated with sodium oleate as the primary layer and polyethylene glycol 6000 (PEG-6000) as the second layer. The morphology of the particle…
We present the self-dynamics of protein amino acids of hydrated lysozyme powder around the physiological temperature by means of molecular dynamics simulations. The self-intermediate scattering functions of the amino acid residue center of mass display a logarithmic decay over 3 decades of time, from 2 ps to 2 ns, fol…
In this work, silver nanoparticles were prepared by polyol process with microwave heating and incorporated on cotton fabric surfaces. The antibacterial performance of the antibacterial cotton fabric was tested for different concentration of nano-sized silver colloid, contact time germs, and washing times. It was found…
We present a detailed study of the influence of pH on the dispersion and film-forming properties of poly(acrylic acid)-stabilized carbon nanotubes. Poly(acrylic acid) (PAA) is a weak polyelectrolyte, with a pH-responsive behavior in aqueous solution. We obtain quantitative UV-visible measurements to show that the amou…
The macroscopic phase separation of undercooled liquid Fe50Sn50 immiscible alloy was investigated by both drop tube experiment and the modified Model H. Core-shell structures with two, three, and five layers were formed during experiment. The concentric shells comprised of Fe-rich phase and Sn-rich phase distribute pe…
Analyses of acoustic wave propagation in a model power transformer are presented in the paper. The acoustic wave is induced by partial discharges that are simulated at predefined coordinates in the core and winding. Propagation of the numerical calculated acoustic wave is analyzed within the transient state. Achieved…
The recent energy crisis and environmental burden are becoming increasingly urgent and drawing enormous attention to solar-energy utilization. Direct solar thermal power generation technologies, such as thermoelectric, thermionic, magnetohydrodynamic, and alkali-metal thermoelectric methods, are among the most attract…
Thin films of yttria-doped ceria (YDC) electrolyte were processed for the first time by atomic layer deposition (ALD) for solid oxide fuel cell (SOFC) applications. The β-diketonate complexes Y(thd) 3 and Ce(thd) 4 were used as yttrium and cerium precursors, respectively, whereas ozone was used as the oxygen source. F…