Materials Literature
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Densely aligned carbon nanotubes (CNTs) by surface decomposition of SiC (0001¯) C-face in vacuum were observed by plan-view transmission electron microscopy. It was found that the wall number of CNTs was directly proportional to the diameter of CNTs. Comparing with the theoretical calculation, it was revealed that all…
Laser-induced acoustic desorption combined with mass spectrometry has been used to demonstrate that phenyl radicals can attack dinucleoside phosphates at both the sugar and base moieties, that purine bases are more susceptible to the attack than pyrimidine bases, and that the more electrophilic the radical, the more e…
The present work reports a feasibility study of the direct mechano-chemical synthesis by controlled reactive mechanical alloying (CRMA) in a magneto-ball mill of the nanostructured magnesium tetrahydroaluminate (magnesium alanate) Mg(AlH(4))(2) complex hydride. Three stoichiometric Mg-2Al mixtures, (a) elemental Mg an…
In this paper, the positive effect of a gold layer on cell viability is demonstrated by examining the results given by 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfop henyl)-2H-tetrazolium (MTS) assay and two-color cell fluorescence viability (TCCV) assay. These cytotoxicity tests were performed wi…
Abstract The morphological features of composite latex particles predominantly develop during the polymerization process and depend upon a significant number of variables. In this study, we have concentrated on the relative polarities of the two polymers in the particles and the rate at which we added the monomers dur…
We investigate the interaction energy between two colloidal particles on or immersed in nonadsorbing polymer brushes grafted onto the substrate as a function of the separation of the particles by the use of a self-consistent-field theory calculation. Depending on the colloidal size and the penetration depth, we demons…
We study the problem of heat conduction in a mass-disordered two-dimensional harmonic crystal. Using two different stochastic heat baths, we perform simulations to determine the system size (L) dependence of the heat current (J). For white noise heat baths we find that J approximately 1/L(alpha) with alpha approximate…
An undecasubstituted chloroiron corrolate, octamethyltriphenylcorrolatoiron chloride, (OMTPCorr)FeCl, has been synthesized and studied by X-ray crystallography and (1)H and (13)C NMR spectroscopy. It is found that, although the structure is slightly saddled, the average methyl out-of-plane distance is only 0.63 Angstr…
We present a combined experimental and theoretical study of the technologically important ${\mathrm{NaBH}}_{4}$ compound under high pressure. Using Raman spectroscopy at room temperature, we have found that ${\mathrm{NaBH}}_{4}$ undergoes a structural phase transformation starting at 10.0 GPa with the pure high-pressu…
Bimetallnanoröhren: Gleichmäßige Anordnungen von Metallnanoröhren entstehen bei der elektrochemischen Abscheidung dünner Metallfilme auf den Porenwänden von mit Metallnanopartikeln beladenen Aluminiumoxid-Membranen. Auf diese Weise sind mehrfach segmentierte Nanoröhren mit bimetallischer Schichtung entlang der Röhrena…
While the proteins of the phosphoenolpyruvate:carbohydrate phosphotransferase system (carbohydrate PTS) have been shown to regulate numerous targets, little such information is available for the nitrogen-metabolic phosphotransferase system (nitrogen-metabolic PTS). To elucidate the physiological role of the nitrogen-m…
Monodisperse cobalt monoxide (CoO) nanocrystals ranging in size from 4.5 to 23 nm were prepared via the thermal decomposition of cobalt acetylacetonate (Co(acac)(2)) in oleylamine under vigorous stirring. The size control of the nanocrystals was achieved by tailoring the reaction temperature or by seed-mediated growth…
The research described here investigates the hypothesis that nanoarchitecture contained in a nanowire array is capable of attenuating the adverse host response generated when medical devices are implanted in the body. This adverse host response, or biofouling, generates an avascular fibrous mass transfer barrier betwe…
A theory of nanoparticle dynamics based on scaling arguments and the Liouville equation is presented. We start with a delineation of the scales characterizing the behavior of the nanoparticle/host fluid system. Asymptotic expansions, multiple time and space scale techniques, the resulting coarse-grained dynamics of th…
Novel thermoplastic starch (TPS)-clay nanocomposite foams were prepared by melt-processing. The use of urea as plasticizer avoids the cracking of TPS during storage and enhances the dispersion of ammonium-treated clay in TPS. X-ray diffraction shows an increase in the basal plane spacings of both natural and treated c…
Let's twist again: A cation–π interaction between Trp and Arg is designed at the interface between two α helices of a coiled-coil structure and stabilizes the structure more than Glu and Lys ion-pair interactions. Two or three Trp–Arg sets form an extended array of interactions (see picture) and increase the melting t…
Abstract The microstructure and rheological property of poly(butylene terephthalate) (PBT)/epoxy/montmorillonite nanocomposites (PCNs) were investigated. For the study, PCNs were prepared by melt intercalation in clay content of 4 wt % and, epoxy loadings were varied from 2 to 4 wt %. The intercalated PCNs are charact…
The electronic structure, x-ray absorption (XAS), x-ray magnetic circular dichroism (XMCD), and magneto-optical spectra of the doped Heusler alloys ${\mathrm{Co}}_{2}{\mathrm{Cr}}_{1\ensuremath{-}x}{\mathrm{Fe}}_{x}\mathrm{Al}$ ($x=0$, 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, and 1) were investigated theoretically from f…
A simple procedure for fabrication of gold films with nanorod arrays is described. The method is based on thermal evaporation of gold onto a porous alumina (PA) membrane used as a template. The gold films were obtained after removing the template and characterized using scanning electron microscopy, atomic force micro…
A simple chemical method for the production of single-crystalline alpha-Si(3)N(4) nanobelts has been developed, consisting of nitridation of a high-Si-content Fe-Si 'catalyst' by ammonia at 1300 degrees C. The as-synthesized product was characterized by means of x-ray diffraction, electron microscopy and energy-disper…