Materials Literature
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Abstract In a molecular frame rigidly bound to the contrast agent, the instantaneous zero‐field splitting (ZFS) Hamiltonian acting on the Gd 3+ electronic spin, S , has a constant mean value, named static ZFS (Hamiltonian). Expressed in the laboratory frame, the static ZFS has a random variation with time, which stems…
We simulate the response of a particle-stabilized emulsion droplet in an external force field, such as gravity, acting equally on all N particles. We show that the field strength required for breakup (at fixed initial area fraction) decreases markedly with droplet size, because the forces act cumulatively, not individ…
LaNbO 4 / La 3 NbO 7 and LaNbO 4 / LaNb 3 O 9 cer‐cer composites were prepared by impregnating Ca ‐doped LaNbO 4 powder, synthesized by spray pyrolysis, with La ‐ or Nb ‐precursor solutions. The sintering of the calcined powders was investigated by dilatometry, and dense composites were prepared by conventional sinter…
This study reports structural and thermal properties and temperature-dependent alternating current (AC) conductivity of polyaniline/selenium (PANI/Se) composites in emeraldine salt form prepared by a chemical polymerization method. Fourier transform infrared spectroscopy showed that the doping process significantly af…
The emerging field of graphene brings together scientists and engineers as the discovered fundamental properties and effects encountered in this new material can be rapidly exploited for practical applications. There is potential for a two-dimensional graphene-based technology and recent works have already demonstrate…
High-responsivity metal-semiconductor-metal TiO(2) UV photodetectors with Ni and Au electrodes were fabricated identically. Their Schottky barrier heights and photocurrent gain mechanism were studied. The effective barrier height Φ and ideality factor n were evaluated according to the thermionic emission theory. The r…
Swift heavy ions of various energies are being used for material modifications. The induced modifications depend on the kind of defects produced during interaction of ions with the target material. In the present work, irradiation of 200 MeV Ag beam-induced effects in NiFe2O4 and NiCe0.04Fe1.96O4 nanoparticles are stu…
Photoirradiation of α-arylthiophene derivatives linked with an alkene moiety through a three-atom spacer gave unprecedented cyclobutene-fused perhydrothiapentalene-type compounds in high yields, but neither [2 + 2] nor [4 + 2] cycloaddition products. The reaction afforded a single diastereomer in many cases. The chemi…
Abstract The aim of the study was to determine the reinforcing efficacy of a silica-rich filler, pottery stone (PS), in natural rubber (NR). The effects of amount and particle size of PS on curing and mechanical properties of the NR compounds were determined. The PS was first divided into four groups. Two of these wer…
Abstract The ternary ceramics of Pb(Yb 1/2 Nb 1/2 )O 3 –Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 (PYMNT) solid solution system is prepared by a two-step synthetic process. Its structure and electrical properties are studied. All the obtained ceramics have pure perovskite structure. It is noted that the morphotropic phase bounda…
In the active site of the bacterial α-methylacyl-CoA racemase of Mycobacterium tuberculosis (MCR), the chirality of the 2-methyl branched C2-atom is interconverted between (S) and (R) isomers. Protein crystallographic data and quantum mechanics/molecular mechanics (QM/MM) computational approaches show that this interc…
The β''-alumina structure is examined in detail and an analysis is presented of the three-dimensional integrity of the lattice. The layer structure that is responsible for the very high sodium conduction rate is the specific focus. Rigid layers that are derived from the cubic spinel structure are interleaved by more o…
Abstract Zinc oxide is a widely used compound in the rubber industry due to the excellent properties that it shows as an activator and, consequently, its role in the mechanism of accelerated sulfur vulcanization has been extensively studied. Due to the increased concern about its environmental effects, several researc…
In this paper, La0.7Sr0.3Mn1-yRuyO3 (y = 0, 0.05, and 0.1) (001) epitaxial thin films were grown on NdGaO3 (110) substrates with in-plane uniaxial strain, and the coercivity (Hc) and in-plane magnetic anisotropy were evaluated. The coercivity of the epitaxial film grown on the NdGaO3 substrate, in which the easy and h…
Abstract Single-screw extruders together with a painstakingly self-made dynamic mixer were applied to mix carbon black (CB) in polymeric matrix. Moreover, the master batch dilution technique was also used. The mixing state of CB was investigated by direct methods including transmission electron microscopy (TEM), scann…
From a fundamental and technological perspective energy transfer up-conversion in luminescent solids is a very important phenomenon that requires different viewpoints for understanding and modeling. The efficiency of this process increases in the presence of energy migration. In this work a model to study the energy m…
Abstract It is well known that most of the dielectric failures occur in high voltage equipment due to absorption of moisture by the insulating material from the environment. Hence, the effect of absorbed moisture on electrical and mechanical properties of silica‐unsaturated polyester resin (UPR) composites has been ev…
Purpose The purpose of this paper is to develop and test control methods for real‐time automatic presser‐foot force control in industrial sewing machines. In this work, a closed‐loop controller that controls presser‐foot maximum vertical displacement is presented and compared to existing solutions that adjust force de…
We used both R-cut and R-face crystal quartz substrates for the efficient growth of horizontally aligned single-walled carbon nanotubes (SWNTs). The R-plane (10–11) is one of the low-index crystallographic planes of crystal quartz. The surface cut from a synthetic quartz block parallel to the R-plane was used as R-cut…
A Keggin-type polyoxometalate [SiW12O40]4− supported transition metal complex, {[Cu(py)2]4[SiW12O40]} (py = pyridine), has been synthesized by hydrothermal decarboxylation and characterized by elemental analyses, IR spectra, thermal stability analyses, and single-crystal X-ray diffraction. The compound is a 1-D chain…