Materials Literature
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<div class="htmlview paragraph">The authors evaluated the durability of current zeolite-type SCR (Selective Catalytic Reduction) catalyst system in terms of poisoning from engine oil components, such as phosphorus, sulfur, calcium and zinc. The engine oil types used included typical CF-4, a sulfur-free type and…
Abstract Poly(glycidyl methacrylate) (PGMA) beads with an average size of 350 μm were synthesized by suspension polymerization technique. The PGMA beads were first modified with iminodiacetonitrile (IDAN). Then, the IDAN‐modified beads were subsequently modified by hydroxylamine. The IDAN modification and the conversi…
<div class="htmlview paragraph">Due to the limited energy resources as well as due to increasing CO<sub>2</sub>-emissions the importance of alternative- and biogene fuels increases continuously.</div> <div class="htmlview paragraph">Investigations of the engine operation were performed on…
It is shown that ultrasound in the gigahertz range can generate space-time Rabi oscillations between spin states of molecular magnets. We compute dynamics of the magnetization generated by surface acoustic waves and discuss conditions under which this novel quantum effect can be observed.
Abstract Several carbon blacks with surface areas from 105 to 1353 m 2 /g were used to produce composites through melt compounding with a high‐density polyethylene matrix. The electrical behavior of the obtained composites was investigated by the measurement of their resistivity as a function of the carbon black conte…
Si–Si and Si–H bonds in small hydrogenated Si particles are known to readily dissociate upon photoexcitation, which hinders various optical applications of Si particles. The authors show that the Si core could be stabilized in the presence of double-bonded oxygen (SiO) on the surface, based on excited-state calculati…
Molecular dynamics simulations have been performed to study the mechanical properties and deformation mechanisms of the so-called super carbon tubes (SCTs), a recently developed network material made by conjoined single- or multiwalled carbon nanotubes. It is found that such SCTs exhibit some unusual mechanical proper…
To design novel bioinspired polymeric material, poly(D,L-lactic acid) (DL-PLA) was on the base and modified in the bulk. Firstly, maleic anhydride (MA) groups were introduced to the side chain of DL-PLA by the way of melting free radical copolymerization using benzoyl peroxide as an initiator. Then, to neutralize the…
Abstract Tetra‐ and pentanuclear lanthanide clusters having dibenzoylmethanido and o ‐nitrophenolato as ligands in the coordination sphere were prepared. Treating [LnCl 3 · 6H 2 O] (Ln = Er, Tm) with dibenzoylmethane and o ‐nitrophenol in the presence of triethylamine yielded the pentanuclear lanthanide clusters HNEt…
Abstract The internal porous structures of the man‐made cellulosic fibers Lyocell (TENCEL®), Modal, and Viscose fibers were visualized by applying fluorescence microscopy on fiber cross sections. The fiber pore structure was probed by the optical brightener Uvitex BHT, and the dye penetration depth was measured. The m…
The formation of nanoscale fine structures during pulsed laser ablation of a silicon target in a hydrogen atmosphere has been studied by analyzing the deposited silicon fine structures prepared under different conditions. Transmission electron microscopy, scanning electron microscopy (SEM), Raman scattering, and infra…
Sintering in air of a pure yttria powder was investigated on green samples shaped by slip casting. The “relative density/grain size” trajectory has been drawn and hypotheses concerning the mechanisms controlling grain growth and densification were formulated. Samples were fully densified by an additional hot isostatic…
Abstract Preparation of thermally stable recycled PET‐organoclay nanocomposites with improved processing and mechanical properties is a challenging task from the environmental as well as industrial and commercial point of view. In this work, both modification of sodium‐type montmorillonite with 1,2‐dimethyl‐3‐octadecy…
Abstract O'Neill, F. G., and Herrmann, B. 2007. PRESEMO—a predictive model of codend selectivity—a tool for fishery managers. – ICES Journal of Marine Science, 64: 1558–1568. The codend selectivity simulation model PRESEMO is a predictive model based on an understanding of the physical, biological, and behavioural mec…
Temperature dependent dielectric response has been measured in Pb(Zr1−xTix)O3 ceramics. Samples of different compositions (x=0.40, 0.47, and 0.60), pure and doped with Nb-or Fe, were studied at temperatures between 15 and 700K and in the frequency range from 100Hzto1MHz. Unexpected dielectric behavior has been found a…
A tunable SrTiO3 solidly mounted bulk acoustic wave resonator has been designed, fabricated, and tested. The solidly mounted resonator was implemented using an acoustical Bragg reflector of alternating high and low acoustic impedance layers. The resonator demonstrated a frequency tunability of 1%, from 5.87to5.81GHz w…
High quality Pt Schottky contact to n-type ZnO was formed using KrF excimer laser. A pulsed laser irradiation of n-type ZnO in O2 pressure of 0.1Mtorr, prior to Pt metal deposition, considerably improved the rectifying characteristics. The Schottky barrier heights of 0.73 and 0.85eV were obtained from the current-volt…
Transport properties are systematically studied for single crystals of ${\mathrm{Cu}}_{x}\mathrm{Ti}{\mathrm{Se}}_{2}$ $(0.015\ensuremath{\leqslant}x\ensuremath{\leqslant}0.110)$. Both the in-plane and out-of-plane resistivity show a wide peak due to charge density waves (CDWs) for single crystals with $x\ensuremath{\…
The authors report on a biopolymeric material made of deoxyribonucleic acid (DNA) complexed with the cationic surfactant cetyltrimethyl-ammonium (CTMA) and doped with the photochromic disperse red 1 dye (DR1) for dynamic holographic recording. The molar ratio of the DNA-CTMA to the dye is about 5:1. They have found th…
The purpose of the present work was to measure the velocity of dendrite growth in undercooled Ni–Al alloy melts as a function of undercooling. The experiments were performed both by containerless electromagnetic levitation on Earth and under reduced gravity conditions during parabolic flight campaigns. While under ter…