Materials Literature
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The effect of interstitial nitrogen on the phase transition and magnetocaloric behavior of MnAs1−xSixNδ (x=0.03, 0.06, and 0.09) is investigated. The interstitial nitrogen atoms cause the step-scanned x-ray diffraction peaks to shift toward lower angles and lower the Curie temperature, whereas silicon addition increas…
Red, green, and blue dyes were doped to polymer dispersed liquid crystal (PDLC) films for flexible display applications. Dichroic dye-doped liquid crystal droplets had a bipolar configuration. The E7–DG6071–dye composition showed better chromaticity data than other compositions. The small-particle-size red-dye-doped P…
Magnetoresistance (MR) and magnetocaloric effect around martensitic transformation were investigated in a Ni45Co5Mn36.5In13.5 alloy. The martensitic temperature (TM) locates at ∼260 K. An external magnetic field can drive TM to a lower temperature at a rate of ∼9.2 K/T. Associated with the field-induced metamagnetic b…
BST thin films with various dopants were grown by the sol-gel method on platinized silicon and MgO substrates. Their dielectric properties were investigated at low frequency (up to 1 MHz) on silicon with parallel-plate capacitors and at high frequency (up to 15 GHz) with interdigitated capacitors on MgO substrate. The…
Abstract In the melt spinning of PET, effects of the variation of flow behavior in the vicinity of spinning nozzle on the mechanical properties of as-spun fibers and drawn fibers were investigated. The variation of flow behavior was introduced by the change of spinning nozzle diameter and by the irradiation of CO2 las…
The temperature rise of NiFe2O4 nanoparticles having diameters of 242 and 7.7 nm was measured. The results of the measurement were analyzed by comparing the areas of the hysteresis loops in order to clarify the mechanism of heat dissipation in the samples. The hysteresis loops were obtained by applying both ac and dc…
A pesquisa teve como objetivo acrescentar culturas starters nativas em salame tipo Italiano e avaliar o desempenho frente a culturas comerciais quanto às características microbiológicas, físico-químicas e sensoriais. As culturas utilizadas foram Staphylococcus xylosus, isolado de salames coloniais, e Lactococcus lacti…
This review is devoted to the characteristics of a new class of polymer composites, dispersions of chemical polymer networks in LCs. Photopolymerization of various bifunctional monomers in the medium of LCs leads to the formation of a polymer network that stabilizes the structure of crystals. Methods for the preparati…
We investigate the interaction of single-walled carbon nanotubes (SWCNTs) and methane molecule from the first principles. Adsorption energies are calculated, and methane affinities for the typical semiconducting and metallic nanotubes are compared. We also discuss role of the structural defects and nanotube curvature…
Neodymium-modified bismuth titanate, Bi4−xNdxTi3O12 (BNdT), nanotube arrays were fabricated by sol-gel method utilizing experimentally prepared porous anodic aluminum oxide (AAO) templates with pore diameters of about 200 nm and 100 nm, respectively. The as-prepared nanotube arrays exhibit orthorhombic perovskite poly…
ZnO micro/nano complex structure films, including reticulate papillary nodes, petal-like and flake-hole, have been self-assembled by a hydrothermal technique at different temperatures without metal catalysts. The wettability of the above film surfaces was modified with a simple coating of heptadecafluorodecyltrimethox…
A modified method, which combines chaos optimization method and simulated annealing algorithm, is proposed to calculate the Jiles-Atherton (J-A) model parameters. The new method is validated by comparing its computation results with measurement data. Then, the validated J-A model is used in numerical modeling of a tra…
Numerical simulations play a key role in various fields of engineering as approach to verify and optimize functional properties for complex configurations which cannot be studied analytically, starting from the early stages of design even before construction of the first prototype. Numerical methods can be adopted to…
Quantum dots labeled with paramagnetic gadolinium chelates can be applied as contrast agent for preclinical molecular MRI combined with fluorescence microscopy. Besides increasing the longitudinal relaxation rate, gadolinium-labeled quantum dots may increase the transverse relaxation rate, which might be related to th…
Transmission electron microscopy was used to study submicrocrystalline structure and thermal stability of molybdenum prepared by severe plastic deformation at 400°C by high-pressure (6 GPa) torsion using 5 revolutions of anvils. Emission Mössbauer spectroscopy was used to study the state of grain boundaries in submicr…
Light scattering in a guanine crystal plate of goldfish scales was observed with and without static magnetic field exposure. Under a microscopic image with dark-field-illumination, the structural color of the scale by guanine plates was observed, and isolated chromatophores showed a twinkling which was the intermitten…
Synthesis and characterization of the polyoxometallate (NH4)42[Mo 72 VI Mo 60 V O372(H3CCOO)30(H2O)72]30H3CCOONH4 · 250H2O (Mo132) with the buckyball structure were carried out. New crystallographic data were obtained. Stability of Mo132 was studied as a function of external factors, acidity, concentration of the solu…
A two-phase kinetic model was implemented for analysing conventional epoxidation, using a percarboxylic acid generated in situ through adding hydrogen peroxide in a two-phase system having a homogeneous catalyst. Data was adjusted using the least square method (0.88 correlation coefficient). The simulation closely pre…
In this paper partial and complete substitution of cations in the interlayer region of clay with different amounts of two aliphatic ammonium cations was performed with aim of synthesis of organobentonites with multipurpose adsorption properties. Domestic clay from Bogovina was submitted according to a common procedure…
Novel Y 1– x – y VO 4 : x Dy 3+ , y Bi 3+ (0.01 ≤ x ≤ 0.05, 0 ≤ y ≤ 0.20) phosphors for light emitting diode (LED) were successfully synthesised by solid-state reaction. The calculation results of electronic structure show that YVO 4 has a direct band gap with 3 eV at G. The top of the valence band is dominated by O 2…