Materials Literature
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Nanotube sidewall opening: The functionalization of single-walled carbon nanotubes (SWCNTs) by addition of CCl2 and NCOOC2H5 groups to the sidewalls has been investigated computationally using density functional theory. The SWCNT electronic structures near the Fermi level are only changed slightly by functionalization…
Electrical and mechanical properties of composite materials based on Carbon Nanotubes are considered for aerospace applications. Nanostructured materials gained great importance in the past decade, owing to their wide ranging potential applications in many areas, e.g. mechanical, structural, sensor, biomedical, electr…
Les eaux de l'Oued Hassar (Maroc) sont caractérisées par une forte minéralisation. La conductivité, variant entre 3470 et 7210 µS.cm -1 , est due essentiellement aux fortes teneurs en chlorures. L'examen de l'Indice de Pollution Organique (IPO) montre que l'effluent d'eaux usées provenant de la ville de Mediouna const…
The refractive index and density of fluorine- and chlorine-doped silica glasses were measured as functions of fictive temperature. The halogen concentrations were observed to have a refractive index or density that is independent of the fictive temperature were found. This implies that these properties are not affecte…
Gadolinium chelates are extensively used in MRI studies. Neurotoxicity due to gadolinium chelates is minimal and uncommon. A 57-year-old woman in renal failure developed a subacute encephalopathy after inadvertent repetitive gadolinium contrast administration. An unusual MRI appearance with CSF hyperintensity due to g…
Two polydentate ligands of the family of dicarboxyimidazoles, H(2)MeDCBI (= 4,5-dicarboxy-1-methyl-1H-imidazole) and H(3)DCBI (= 4,5-dicarboxyimidazole), have been used in reactions with the [Fe(3,5-(t)()Bu(2)salpn)](+) species {3,5-(t)Bu(2)salpn = the dianion of 1,3-bis-[(3,5-di-tert-butylsalicylidene)amino]propane}…
Commingling is becoming an important method for developing thermoplastic composites, which demonstrate significant advantages over thermoset composites in several applications including aerospace, marine, sporting, and automotive industries. Although the commingling technique has a very high potential to produce towpr…
Formation of the vinylogous bridge between adjacent pyrrole rings (A and B) in the reaction of 5,10,15-triphenylcorrole with CI4 affords the corresponding hemiporphycene (see structure; N blue, I pink, C white, H green). This approach allows a facile preparation of functionalized hemiporphycenes.
We report the preparation of complexes in which ruthenium(II) bis(bipyridyl) groups are coordinated to oligothiophenes via a diphenylphosphine linker and a thienyl sulfur (P,S bonding) to give [Ru(bpy)(2)PT(3)-P,S](PF(6))(2) (bpy = 2,2'-bipyridyl, PT(3) = 3'-(diphenylphosphino)-2,2':5',2' '-terthiophene), [Ru(bpy)(2)P…
This communication outlines a simple two-step approach of modification of 1 nm diameter Au nanoparticles using an aqueous solution of (1,2-dipalmitoyl-sn-glycero-3-phosphothio-ethanol) phospholipid (PL). Transmission electron microscopy as well as particle size analysis show that, as a result of PL reactions with Au p…
Insulin with built-in pairs of boronates and polyols can produce soluble high molecular weight self-assemblies under control by carbohydrates. The illustrated principle has potential utility for general protein and peptide protraction and controlled drug release.
The electromigration effect within current-density-stressed signal and power lines is an ubiquitous and increasingly important reliability and design problem in sub-micron IC designs. It is therefore necessary to consider electromigration-related design parameters as early as possible in the physical design flow. In t…
Ferromagnetic or antiferromagnetic coupling? A theoretical study of complexes containing MoV–CN–MnII bridges reveals that a combination of local symmetry and molecular pseudosymmetry leads to a fascinating electronic structure that imposes antiferromagnetic interactions and results in a ferrimagnetic arrangement. The…
In this paper, a facile and general strategy has been proposed for the preparation of a series of microcapsules with the diverse shell compositions from silica to nonsilica (e.g., titania, zirconia, platinum, silver sulfide, cadmium sulfide, indium sulfide, and cadmium telluride) by simply alkaline treating the cation…
Tellurite glasses optimized for higher Raman gain and broad bandwidth have been realized. These glasses were found to have improved thermal stabilities, which make them suitable for fiber devices applications. While maintaining the Raman gains at higher values, the Raman bandwidths could be broadened by proper additio…
We have carried out theoretical investigations to explore the diffusion of lithium on the exteriors and the interiors of single-walled carbon nanotubes (SWNTs). We found that lithium can adsorb on both interior and exterior surfaces with adsorption energy around $\ensuremath{-}2.44\phantom{\rule{0.3em}{0ex}}\mathrm{eV…
Periodic DFT and combined quantum mechanics/interatomic potential function (QM-pot) models were used to describe the interaction of CO with the Cu+ sites in FER. The CO stretching frequencies were calculated using omega(CO)(CCSD(T))/r(CO)(DFT) scaling method relating frequencies determined using a high-level quantum-c…
In the last two decades, the development of polymers which change their structures and properties in response to environmental stimuli such as pH, temperature, and light has attracted a great deal of attention (1-3). Such polymers have been called ‘‘smart polymers,’’ ‘‘intelligent polymers,’’ ‘‘stimulus-sensitive poly…
Carbon nanotubes with a double coaxial structure of nitrogen-doped and undoped multiwalls were successfully prepared by the template technique using porous anodic aluminum oxide film as a template. The inner carbon layer (or the outer carbon layer) of the double coaxial carbon nanotubes is free from N, while the outer…
Electrochromic multilayer films consisting of polyoxometalate (POM) cluster alpha-K(10)[P(2)W(17)O(61)].17H(2)O (P(2)W(17)), copper(II) complex [Cu(II)(phen)(2)](NO(3))(2) (phen = 1,10-phenithroline), and iron complex [Fe(II)(phen)(3)](ClO(4))(2) were fabricated on silicon, quartz and ITO substrates by layer-by-layer…