Materials Literature
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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…
Abstract The morphology of nylon 6 and polystyrene (PS) blend with styrene‐maleic anhydride copolymer (SMA) as a compatibilizing agent was studied. The long‐time mixing of blends exhibited slight decrease in storage modulus and larger domain size. This may be caused by imidization between amine end‐group of nylon 6, a…
In this study, natural rubber (NR) was reinforced with the unique composition of Jordanian silica sand at different loadings (10, 30, 50, and 75 pphr) and different particle sizes (10, 25, 45, and 75 μm). Several tests, such as hardness, tensile strength, elongation at break, compression set, compression stress-strain…
Abstract β‐Chitin was extracted from squid pens and its heterogeneous alkaline deacetylation was performed under various conditions. The kinetics of the first, second and third deacetylation reaction of β‐chitin was investigated under conditions minimizing bulk mass transfer. It was found that the effects of temperatu…
In principle, one might prepare thin polymer membranes in an easy and economic way by generating a wetting layer of a polymerizable oil on a water surface, solidifying it, and transferring it to a solid substrate. However, there is hardly any oil that wets a water surface. One efficient way to assist the wetting of th…
The ring-opening polymerization of α-methylene-ε-caprolactone (α-MCL) is presented for the first time. Poly(α-MCL) was characterized by 1 H NMR, GPC, DSC, and MALDI-TOF. The ring-opening copolymerization of α-MCL with ε-caprolactone (ε-CL) yields to formation of radically cross-linkable poly(ε-CL)s with melting points…
Within the framework of a self-consistent $spd$ tight-binding Hamiltonian and ab initio pseudopotential techniques we study the magnetic properties of small ${\mathrm{Co}}_{N}$, ${\mathrm{Ni}}_{N}$, ${\mathrm{Rh}}_{N}$, and ${\mathrm{Pd}}_{N}$ $(N=4\ensuremath{-}21)$ clusters having noncompact structures. Following th…