Materials Literature
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A new structural classification of nanomaterials is proposed; it is based on the different natures of structural nanoelements that radically change the properties of nanomaterials. This new structural classification of nanocrystals is analyzed from a standpoint of their deformation behavior. The size series of nanocry…
A magnetic loading technique was used to produce planar ramp loading of [100] and [110] orientations of single crystal tantalum to peak stresses of either ∼18 or ∼86 GPa for applied plastic strain rates of about 2 × 106/s. It was found that the dynamic elastic limit varied only slightly for factor-of-2 changes in the…
The refractive index tailoring in the surface layers of polycarbonate has been carried out with low energy nitrogen ion implantation. The specimens were implanted at 100 keV with nitrogen ions in the fluence range of 1×1015−to 1×1017 ions cm−2. The refractive index values of virgin and implanted specimens have been ca…
Multiferroic BiFeO3 epitaxial films were fabricated on SrTiO3 (100) substrates by a chemical solution deposition method. Magnetic layers of Co, Py, Co40Fe40B20, Co75Fe25, and Co50Fe50 were then deposited by sputtering under a magnetic field. Despite employing a chemical process, a clear exchange bias was observed for…
Suppressing Cu diffusion along the Cu/Cap interface has proven to be one of the most effective ways to enhance the electromigration (EM) resistance of advanced Cu interconnects. Two methods, depositing a thin layer of CoWP on the Cu surface and doping the Cu seed layer with Mn, are presented in this paper. While each…
Wet oxidation can be used to produce high quality zinc oxide (ZnO) nanostructures at moderately high temperatures with low requirements of equipment and experimental conditions. Zn precursor films were prepared by magnetron sputtering and controlled ZnO nanostructures were produced by oxidation of the Zn precursor fil…
In order to investigate the effect of boron additions in the magnetostrictive behavior of Fe72Ga28 alloy, this alloy was doped with 0.5, 1.0, 1.5 and 2.0 at.% of boron. The results have shown that boron additions of 0.5 and 1.0% improve significantly the magnetostriction, the values being about two-fold higher compare…
Linear and nonlinear dielectric measurements of AgNbO₃ ceramics and single crystals were carried out for the M phases (77-673 K). The linear dielectric response is dominated by the contribution of the submillimetre relaxational mode related to the Nb⁵+ ion dynamics (M₂-M₃). On the other hand, nonlinear dielectric χ₃'…
The Sm2Co17 magnet is the most promising candidate for high temperature applications. The microstructure evolutions and losses in the magnetic properties of the magnet in high temperature aging status have been investigated. The Sm(CobalFe0.22Cu0.068Zr0.025)7.75 magnets were prepared using the conventional powder sint…
Grünes Licht für helicale Komplexe: Die Kopplung zweier CrIII-Sensibilisatoren an einem ErIII-Akzeptor in einem selbstorganisierten Kation ergibt hohe lokale Metallkonzentrationen, die eine effiziente Upconversion-Lumineszenz mit nichtlinearem Energietransfer begünstigen (siehe Bild). Bei selektiver Einstrahlung von N…
To overcome the weak mechanical properties of cell/hydrogel composites, a poly(DL-lactic-co-glycolic acid) sandwiched adipose-derived stem cell (ADSC)/fibrin construct was fabricated using a step-by-step mold/extraction method to generate the middle smooth muscle layer of natural blood vessels. A pulse bioreactor with…
In this paper we present a magnetic study of Co1−xBixFe2O4 nanoparticles obtained by applying magnetic fields up to 14 T and for temperatures in the range of 5 to 340 K. Hysteresis loops yield a saturation magnetization (Ms), coercive field (Hc), and remanent magnetization (Mr) that vary significantly with temperature…
We offer a perspective, accessible to both chemists and physicists, of recent developments in the synthesis and characterization of molecular magnetic materials based on rare-earths and nitronyl-nitroxide radicals. We show both the rationale of the synthetic strategies and the observed behaviors. We highlight the rele…
Abstract Nanocrystals of magnetite (Fe 3 O 4 ) were prepared by sol‐gel technique. The prepared nanocrystals were characterized for phase by powder X‐ray diffraction (XRD) of the samples annealed at successively higher temperature. The magnetite phase was formed during the annealing of the synthesized powder at 400 °C…
Vapor-grown carbon nanofibers (CNFs) were dispersed in an epoxy resin using various techniques such as ultrasonication, high-speed mechanical stirring, and the use of solvent, surfactant and higher temperature. The dispersion behavior of CNF in epoxy was studied by optical microscopy and its effect was investigated on…
In the present study, we introduce Poly(vinylidene fluoride) (PVDF) nanofibers containing nickel (Ni) nanoparticles (NPs) as a result of an electrospinning. Typically, a colloidal solution consisting of PVDF/Ni NPs was prepared to produce nanofibers embedded with solid NPs by electrospinning process. The resultant nan…
Drug delivery systems are designed to improve therapy efficacy as well as patient compliance. This could be accomplished by specifically targeting a medication intact to its active site, therefore reducing side-effects and enabling high local drug concentrations. Silica nanoparticles have gained ground in the biomedic…
Ni0.27ZnxFe2.73-xO4 (with x = 0.03−0.1) thin films with high real permeability μr′ in the GHz range were fabricated by the spin spray process onto glass substrates in the presence of an external magnetic field of 360 Oe. These films exhibit high permeabilities that exceeded the Snoek limit for bulk NiZn-ferrite films…
Iron nanowires and nanoparticles are fabricated via the reduction of iron salts (FeCl3•6H2O) with or without a parallel magnetic field, respectively. Polyvinyl pyrrolidone was added during the reduction process and formed a thin passive layer to minimize the oxidation. The as-obtained iron nanomaterials were then used…
In this work, ellagic acid (EA), a naturally occurring plant polyphenol, was utilized for the biomimetic synthesis of silver (Ag) nanoparticles, which over a period of time formed extended branched nanochains of hexagonal-shaped silver nanoparticles. It was found that EA not only has the capability of reducing silver…