Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTA Particle Tracking Velocimetric Study of Stress Relaxation Behavior of Entangled Polystyrene Solutions after Stepwise ShearGengxin Liu and Shi-Qing Wang*View Author Information Department of Polymer Science, University of Akron, Akron, Ohio 44325*E-mail: [email protected]Cite…
Abstract Polymer light‐emitting diodes (PLEDs) having indium tin oxide (ITO)/PEDOT:PSS [poly(3,4‐ethylenedioxythiophene)‐polystyrene sulfonate]/PVK [poly‐vinylcarbazole]:PFO‐poss [poly(9,9‐dioctylfluorene) end capped by polyhedral oligomeric silsesquioxane]/TPBI [2,2',2”‐(1,3,5‐benzinetriyl)‐tris(1‐phenyl‐1‐H‐benzimid…
The low-temperature deposition of clean, conformal copper film by a vapor phase process using Cu(I) β-diketimine complex 1 is described. The process is similar to the digital CVD process described earlier with the related Cu(I) complex 2 in requiring pulse-and-purge cycles of reagents. However, here a surface-activati…
We have demonstrated volumetric Bragg gratings (VBGs) for mid-IR spectral range based on LiF color center (LiF:CC) crystals. γ-irradiated LiF:CC crystals feature strong absorption bands in the visible and near-IR spectral range, where selective color center photo-bleaching allows for the LiF refractive index modificat…
Abstract The contribution is dedicated to the durability of geotechnical stabilization applications. The long‐term corrosion behavior of unprotected and galvanized thread‐bars for micro‐piles and nails in different soils is described. The bars in the ground are embedded in an up to 20 mm thick cement mortar, which may…
Abstract Two bimetallic cryptates (containing Cu and Co), which have previously been shown to react with and activate atmospheric CO2, were tethered to modified mesoporous SiO2 and their activities in promoting the CO2+H2 reaction has been analysed. The cryptates were tethered to C3H6Cl‐modified SBA‐15 through a cond…
Abstract During the heating process the temperature‐induced liquid–liquid structure transition (LLST) of Al86Ni9La5 melt from 1320 to 1490 K was identified by both electrical resistivity and differential thermal analysis measurement. The effects of liquid structural change on the crystallization behavior and glass for…
Nitrogen hyperfine coupling constants (hcc) a(N) of nitroxides measured by electron paramagnetic resonance are used to probe the cybotactic effect of solvents. A few articles (Janzen et al., Can. J. Chem. in 1982 for a(Hβ) and Deng et al., J. Fluorine Chem. in 2002, both for a(Hβ) and a(Fβ)) dealt with the cybotactic…
Most of the hydrogen peroxide (H2O2) bio-sensors developed till date are based on enzymes and proteins causing them to have a limited lifetime. Moreover, complex procedures are followed for sensor fabrication. Therefore, an inorganic material-based sensor, with a simple design and longer shelf life is highly desirable…
Mitochondrial aminoacyl-tRNA synthetases are key enzymes in translation. They are encoded by the nuclear genome, synthesized as precursors in the cytosol and imported. Most are matured by cleavage of their N-terminal targeting sequence. The poor expression of mature proteins in prokaryotic systems, along with their lo…
Abstract Two sets of new peptides incorporating fulleropyrrolidine units – Fp‐GABAn‐Glym‐OtBu – have been designed, synthesized and completely characterized. In the first series the chain contained only GABA (γ‐aminobutyric) residues, whereas in the second one glycine moieties were also inserted as well as GABA. Most…
BACKGROUND: History drives community assembly through differences both in density (density effects) and in the sequence in which species arrive (sequence effects). Density effects arise from predictable population dynamics, which are free of history, but sequence effects are due to a density-free mechanism, arising so…
Conventional superplastic forming (SPF) is normally conducted at a slow forming rate (10 −3 s −1 or slower) and high temperatures (typically 773 K or higher for aluminum alloys), which is not attractive for wider applications. Recently, SPF has revived as an attractive process in the automotive and aerospace industrie…
Abstract The effect of oxygen partial pressure on the phase transformation of Al2O3 scale on various Fe–Al alloys with and without very thin (∼100 nm) Fe coating was investigated. Fe‐coating on Fe–Al alloys can effectively suppress metastable Al2O3 formation, but little effect was observed when the samples were oxidiz…
Nanocrystalline Fe3O4 and α‐Fe2O3 particles were successfully synthesized by hybrid electrochemical‐thermal method. The as‐prepared compound was calcined for an hour at different temperature. The crystallite size, morphology, and chemical state of the synthesized powders were characterized by powder XRD, TG‐DTA, XPS,…
Ein n-dotierter polymerer Halbleiter, Poly(2,3-bis(perfluorohexyl)thieno[3,4-b]pyrazin), wurde durch Pd-katalysierte Polykondensation in einem mehrphasigen Lösungsmittelsystem synthetisiert. Dies ist das erste Beispiel für einen n-dotieren polymeren Halbleiter, der ausschließlich in fluorierten Lösungsmitteln löslich…
Al7Mg5Si-based TiC reinforced composites have been produced by casting methods. The microstructures of the monolithic alloy and the composite materials are explained in terms of solidification phenomena. The TiC presence significantly alters the matrix microstructure both by causing extensive grain refinement and by a…
Abstract According to ASTM G50‐76, materials have been exposed to atmospheres of Saudi Arabia. Environmental factors such as temperature, relative humidity and deposition rates of pollutants (Cl− and SO2) were investigated. X‐ray diffraction was used for characterization. Corrosion rates were determined by weight loss…
Simultaneous and sequential adsorption equilibria of single and binary adsorption of bovine serum albumin and bovine hemoglobin on Q Sepharose FF were investigated in different buffer constituents and initial conditions. The results in simultaneous adsorption showed that both proteins underwent competitive adsorption…
Following a short discussion of the granular model for an inhomogeneous superconductor, we review the Uemura and Homes correlations and show how both follow in two limits of a simple granular superconductor model. Definite expressions are given for the almost universal coefficients appearing in these relationships in…