Materials Literature
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We report on current-induced magnetization switching (CIMS) in single- crystalline nanopillars. Fe(14 nm)/Cr(0.9 nm)/Fe(10 nm)/Ag(6 nm)/Fe(2 nm) multilayers are deposited by molecular-beam epitaxy. The central Fe layer is coupled to the thick one by interlayer exchange coupling over Cr. The topmost Fe layer is decoupl…
We discuss the influence of disorder on domain structure formation in ferromagnetic phase of diluted magnetic semiconductors (DMS) of p-type. Using analytical arguments we show the existence of critical ratio $ν_{\rm {cr}}$ of concentration of charge carriers and magnetic ions such that sample critical thickness $L_{\…
Optical 3D alignment of nanocylinders has been successfully attained for thin films of a block copolymer (see figure) comprising azobenzene-containing liquid-crystalline polymers and poly(ethylene oxide) via photoinduced massive migration. The out-of-plane and in-plane alignments are achieved by controlling the film t…
Multiferroic Cr-doped BiFeO3 (BFO) thin films were prepared on Pt∕TiO2∕SiO2∕Si(100) substrates by a chemical solution deposition method. From the x-ray photoelectron spectroscopy measurements, it was observed that the valence number of Fe ion in undoped and Cr-doped BFO thin films was found to be almost 3+. It was fou…
The change of ferroelectric, dielectric, and piezoelectric properties with time, the ferroelectric aging phenomena, has been observed in most ferroelectrics. Phenomenologically, aging can be attributed to the gradual stabilization of ferroelectric domains by defects, but the microscopic origin of the domain stabilizat…
Abstract: Facile complexation of the acetylenic triple bonds in the hyperbranched polyynes ( hb -PYs) with cobalt carbonyls readily furnishes cobalt-containing organometallic polymers at room temperature. The cobalt-polyyne complexes are highly resistant to thermolysis. Pyrolyses of the polyyne complexes under nitroge…
The temperature dependences of resistivity, magnetoresistance (MR), and current-voltage $(I\text{\ensuremath{-}}V)$ characteristics of grain boundaries (GB) in ${\mathrm{La}}_{0.6}{\mathrm{Pb}}_{0.4}{\mathrm{MnO}}_{3}$ thin films prepared using bicrystal ${\mathrm{SrTiO}}_{3}$ substrates have been studied. Comparison…
Hyper-Rayleigh scattering (HRS) spectra were measured for liquid solutions of C6H5NO2 and CH3NO2 at T=300 K. The depolarized HRS spectra at small frequency shift are dominated by two components due to reorientation of the nitrobenzene molecules. One is a Lorentzian with spectral width nu1=0.16-0.45 cm(-1) and correspo…
The acrylic resin leather coating agent modified by nano-SiO 2 is investigated in this article. Nano-SiO 2 is prepared by the sol–gel reaction from tetraethoxysilane (TEOS) catalyzed with acid and mixed with an acrylic resin. The properties of nano-SiO 2 particles at different aging times are studied. The physical–mec…
Was machen die Amyloide? Vier identische Segmente des Amyloid-β-Peptids, das unter Verdacht steht, durch Bildung von Fibrillen die Alzheimer-Krankheit auszulösen, wurden an ein cyclisches Decapeptid-Templat gekuppelt. Diese Anordnung bildet lösliche Protofibrillen (siehe Bild) mit gekreuzter β-Faltblatt-Struktur und s…
To test a new interaction potential, molecular dynamics simulations of zeolite natrolite were performed for the structures under ambient conditions hydrated by perdeuterated water and at high pressure (1.87 GPa) in the superhydrated phase, which were recently studied by neutron diffraction. The experimental structures…
Enhanced dipole radiation in the presence of a flat metallic surface and a metal nanoparticle is considered on the basis of Maxwell's equations. For the case of axi-symmetrical illumination the initial problem is reduced to a system of boundary integral equations for the angular component of the magnetic field and its…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTPoly(thieno[3,4-b]furan). A New Low Band Gap Conjugated PolymerArvind Kumar, Zeki Buyukmumcu, and Gregory A. SotzingView Author Information Department of Chemistry and the Polymer Program, Institute of Materials Science, University of C…
We investigate the composition dependence of the segmental dynamics of poly(methyl methacrylate) [PMMA] in miscible binary blends with poly(ethylene oxide) [PEO] using quasi-elastic neutron scattering [QENS] in combination with deuterium labeling. Blends with 10, 20, and 30 wt % PEO are considered. Our main finding is…
The reactivity of the Ti(8)C(12)(+) met-car cation toward thiophene was investigated using density functional theory (DFT) and mass selective ion chemistry. It is shown that the experimentally observed mass spectrum can be well described by the DFT calculations. In contrast to the weak bonding interactions seen for th…
In this study polyimide/inorganic silica–alumina nanoparticle hybrid films are first prepared by sol–gel method to find a promising method for enhancing thermal property and other properties. Silica sol and alumina sol starting from tetraethoxysilicane (TEOS) and aluminum isopropylate (AIP) are doped in a solution of…
The multizone circulating reactor allows the production of intimate mixtures of polyolefins of widely different characteristics, enlarging the envelope for properties of these polymers. A mathematical model for the gas-phase polymerization of olefin in a multizone circulating reactor (MZCR) is presented. The system is…
The optical properties of plasmon coupled, planar silver nanoparticle arrays (PSNA) were studied as a function of the refractive index of the surrounding medium. The PSNA samples were fabricated by self-assembling 100 nm silver particles into a single layer on chemically modified glass substrates. The arrays exhibit a…
New PIN photodiode devices based on CVD diamond have been produced showing high responsivity in a narrow bandpass around 200 nm. A set of measurement campaigns was carried out to obtain their XUV-to-VIS characterization (responsivity, stability, linearity, homogeneity). The responsivity has been measured from the XUV…
Abstract Blends of polypropylene/tetrabromobisphenol A bis(2,3‐dibromopropyl ether) (PP/TBAB) were prepared by twin‐screw extruder, and then were molded into PP/TBAB plaques. Blooming of TBAB on the surface of PP/TBAB plaques were studied through heat aging test and theoretical calculation. The heat aging test at 70°C…