Materials Literature
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Surface-architecture-controlled ZnO nanowires were grown using a vapor transport method on various ZnO buffer film coated c-plane sapphire substrates with or without Au catalysts. The ZnO nanowires that were grown showed two different types of geometric properties: corrugated ZnO nanowires having a relatively smaller…
Four new dimeric bis(BF(2))-2,2'-bidipyrrins (bisBODIPYs), and their corresponding BODIPY monomers, have been prepared and studied with respect to their structural and photophysical properties. The solid-state molecular structure of the dimers and the relative orientation of the subunits have been revealed by an X-ray…
Here, we demonstrate an approach for the selective growth of Pt, PtNi, and PtCo on CdS nanorods. The hybrid nanostructures prepared via an organometallic synthesis have promise for photocatalytic and magnetic applications.
We report on the synthesis of thin, transparent, and highly catalytic carbon nanotube films. Nanotubes catalyze the reduction of triiodide, a reaction that is important for the dye-sensitized solar cell, with a charge-transfer resistance as measured by electrochemical impedance spectroscopy that decreases with increas…
In order to prove the superiority of cotton fabric to polyester with regard to flammability, we have studied the effect of Graham's salt as a moderate and nondurable finish on the flammability of pure polyester and cotton fabric. The laundered bone-dried, weighed fabrics were impregnated with suitable concentration of…
We have investigated the temperature and bias-voltage dependences in the tunneling magnetoresistance (TMR) curves for (Ga,Mn)As-based double-barrier magnetic tunnel junctions (DB MTJs). The coercive fields in each magnetic (Ga,Mn)As layer drastically decrease depending on the variations in the temperature. TMR ratios…
The phthalocyanine analogue containing nonperipheral long alkyl-substituted benzenoid rings and pyridine rings, zinc bis(1,4-didecylbenzo)-bis(2,3-pyrido) porphyrazine, was synthesized. Zinc bis(1,4-didecylbenzo)-bis(2,3-pyrido) porphyrazine reacted with dimethyl sulfate and monochloroacetic acid to produce their quat…
Dispersions of hydrophilic (A300) and hydrophobic (R812) silica aerosils in a Schiff-base-type liquid crystal (LC), p-ethoxy(benzylidene)-p-n-butylaniline (2O.4), EBBA, were characterized by deuterium nuclear magnetic resonance (DNMR). The formation and stability of random (RAN) versus anisotropic (AAN) aerosil networ…
Chitosan was grafted with p-carboxy N-phenyl maleimide (PCPM) using a redox initiator potassium persulfate (K2S2O8) and sodium bisulfite (NaHSO3) and also by γ irradiation. The effects of monomer concentration, initiator concentration, pH value, and temperature on the extent of grafting were studied. The grafting perc…
Abstract Nanofibers of polypyrrole have been synthesized by sonochemical method in the presence of a structure directing agent, i.e. dodecyl benzene sulphonic acid (DBSA). The length of the fibers is seen to increase significantly from ∼13 nm to greater than ∼1700 nm, while the diameter is ∼13–17 nm, respectively. The…
We examined the morphology of setae and microtrichia in Aquarius paludum during larval development using a scanning electron microscope. We then conducted immersion experiments with larvae and adults in oxygenated and deoxygenated water. The adult water strider body is covered by a pilose double layer consisting of up…
Abstract Polythiophene is a typical conducting polymer. Unoccupied electronic states near the Fermi level of polythiophene polycrystalline powder were probed using S 1s X‐ray absorption spectroscopy (XAS) and S KL 2, 3 L 2, 3 resonant Auger spectroscopy (RAS). Its overall XAS spectral shape resembles those of 2,‐2′‐bi…
A Comment on the Letter by Maxim Mostovoy, [Phys. Rev. Lett. 96, 067601 (2006)]. The author of the Letter offers a Reply.
We report a scanning focused laser technique for pixel-by-pixel activation of the screen-printed carbon nanotube cathodes for field emission flat panel displays. The turn-on and working field of the cathodes became as low as 1.96 V microm(-1) and 2.70 V microm(-1), respectively, after 57 kW cm(-2) laser irradiation. T…
Abstract Cellulose, a (1→4)‐linked β‐ D ‐glucopyranosyl polysaccharide, is the main plant cell wall constituent and is water insoluble in its native form. Sodium cellulose sulfate possesses excellent water solubility at degree of substitution (DS) levels as low as 0.25. Cellulose sulfate was prepared from α‐cellulose…
Abstract Polyaniline is an electroactive polymer, which presents attractive properties for its use as a transducer in electro‐biosensors. Covalent binding of bioreceptors on the polymeric surface is necessary to perform selective and efficient bioanalyte detection. To achieve this goal, acrylic acid (AAc) is grafted o…
Ceramic-filled PEEK composites were prepared by sigma mixing followed by thermolamination. Rutile-grade titanium dioxide, particle size less than 5 μm, was used as the particulate filler in the PEEK matrix to tailor the dielectric properties of the composite matrix. The dispersion of the particular filler in the PEEK…
We report a comparative Raman spectroscopic study of the quasi-one-dimensional charge-density-wave (CDW) systems A 0.3 MoO 3 (A = K, Rb). Temperature- and polarization-dependent experiments reveal charge-coupled vibrational Raman features. The strongly temperature-dependent collective amplitudon modes in the two mater…
We report on the investigation of correlated spectral properties of two different surface-related photoluminescence bands in ZnO nanowires. We show that the spectral position and the temperature-dependent intensity of the surface-related emission band A are directly correlated with the emission of the surface-exciton…
We describe the dynamic polarization of graphene's $\ensuremath{\pi}$ electrons by means of the Vlasov equations in the relaxation-time approximation and evaluate the stopping and the image forces on slow ions moving parallel to a supported graphene under the gating conditions. While the effects of temperature and the…