Materials Literature
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We study the X-band EPR spectra of Co2+ in single-crystalline Zn1−xCoxO (x=0.001–0.075) thin films grown by plasma-assisted molecular beam epitaxy. By analyzing the EPR linewidth behavior we argue that the exchange-narrowing model, usually applied to Mn-based II-VI DMS, fails here and that a combined effect of exchang…
Plasma methods for processing spent nuclear fuel are analyzed. It is shown that, by ICR heating in a nonuniform magnetic field, the energy of the heated ash ions can be increased substantially, while nuclear fuel ions can be kept cold. Two methods for extracting heated ash ions from a cold plasma flow are considered,…
Comparative investigations of the nuclear magnetic resonance and nuclear spin-spin relaxation residents of Mn55 nuclei of nanopowders of the manganite La0.7Sr0.3MnO3 with different particle sizes 50–200nm (NP1) and 12nm (NP2) have been performed. It has been found that two local ferromagnetic phases (FgM and FbM) with…
Electron beam induced deposition (EBID) is of interest as a damage-free and resist-less means of incorporating nonconventional materials such as polymer fibers, nanowires, and carbon nanotubes into integrated circuits. A novel inorganic platinum precursor—Pt(PF3)4—is investigated in this work, as it has previously bee…
The electrical conductivity of hydrogenated diamond surfaces was reported in 1989. Whereas the experimental verification of the conductivity is simple, an Ohmmeter is sufficient, a satisfactory explanation of the effect has not been proposed yet. Existing models attempt to explain the effect on the basis of the semico…
Poly(lactic acid) (PLA)/starch/montmorillonite (MMT) biodegradable blends were prepared in a twin-screw extruder. The effect of MMT content on the mechanical and thermal properties of the blends was studied. The microstructure of the composites was observed by wide-angle X-ray diffraction and transmission electron mic…
An enhancement-mode ZnMgO transparent thin-film transistor (TFT) is fabricated, in which cubic-phase ZnMgO (C-ZnMgO) is used as gate insulator and hexagonal-phase ZnMgO (H-ZnMgO) is used as channel. The multilayers of C-ZnMgO and H-ZnMgO are grown on patterned indium-tin-oxide-coated glass in successive fashion at low…
Abstract Electrochemical impedance spectroscopy (EIS) and the scanning electron microscope (SEM) have been used in an investigation of the effectiveness of various sealing methods that can be used to improve the corrosion resistance of an anodized aluminum‐silicon carbide (Al/SiC) composite. Anodic oxide films were gr…
Abstract In the present work, we use Raman spectroscopy as sensitive tool for the characterization of graphene samples. We observed diverse shifts in the position of the Raman mode close to 2650 cm –1 in various as‐prepared graphene flakes. In order to elucidate the reason for this variation, we checked different subs…
Abstract Defined n‐doping of carbon nanotubes can find potential application in nanoelectronics and sensors. An efficient doping can be achieved by substituting Carbon by heteroatoms such as Nitrogen. We explored the formation process of N doped single‐walled nanotubes within hot wall chemical vapor deposition employi…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTNovel Poly(acrylic acid)-Mediated Formation of Composited, Poly(3,4-ethylenedioxythiophene)-Based Conducting Polymer NanowiresXuping Sun and Matthias HagnerView Author Information Fachbereich Chemie and Fachbereich Physik, Universit…
A mechanochemical method is developed for preparing quasicrystalline powdered alloys in the Al-Cu-Fe system and related materials. Quasicrystals are designed and proposed for use in practice as filling materials for metal and polymer matrices. The structure and mechanical properties of the designed materials are descr…
Hoodia gordonii, family Asclepiadaceae, is a succulent plant and is traditionally used in southern Africa for its appetite-suppressant properties. A high-performance liquid chromatographic (HPLC) method with UV detection for analysis of 11 oxypregnane glycosides from H. gordonii has been developed. The simultaneous an…
Abstract Eight new benzoylated gentisyl alcohol (=2‐(hydroxymethyl)benzene‐1,4‐diol) glucosides, itosides A–H ( 1 – 8 ), together with the new pyrocatechol (=benzene‐1,2‐diol) glycoside itoside I ( 9 ) were isolated from the bark and twigs of Itoa orientalis (Flacourtiaceae). In itosides B–D ( 2 – 4 ), the gentisyl al…
The failure of polyester and phenolic pultrusions under tensile and compressive load and a one sided heat flux of 50 kW m−2 has been studied. A thermal/mechanical model, based on the Henderson equation and laminate theory, has been used to model their behaviour. In tension, significant load bearing capacity was retain…
We investigated, by means of dielectric spectroscopy, the relaxation dynamics of glass forming binary mixtures composed by the quite rigid polar molecules tert-butylpyridine dissolved in the apolar solvent tristyrene. By changing the relative concentration of the components we observed a transition from a relaxation s…
Abstract Polyhedral oligomeric silsesquioxane (POSS) was synthesized with hydroxyl functional groups and the nanoparticles were characterized by infrared spectroscopy and transmission electron microscopy. They were found to have an average diameter of 50 nm.The effect of these synthesized POSS nanoparticles as curing…
Diatoms are used as environmental indicators in the Florida Everglades, a large subtropical wetland highly impacted by phosphorus pollution. However, the taxonomy of the diatom flora, a mix of temperate and tropical diatoms, is understudied. Therefore, we analyzed the taxonomy of 71 diatom taxa collected in Water Cons…
The Zn-Mg alloys with Mg additions of 35%, 40% and 45% (mass fraction) were prepared by conventional casting method, with the aim to develop new biodegradable materials. The effects of cooling rate and composition on the microstructures, hardness and corrosion resistance were studied by XRD, SEM, microhardness and cor…
Plasma electrolytic oxidation (PEO) is a unique coating technology, which enables fabrication of high performance ceramic surfaces on the light metals, with thickness, topography, composition and structure controllable by the process parameters. Here the growth of anodic coatings on titanium, important due to their bi…