Materials Literature
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The uptake of pristine single-walled carbon nanotubes into macrophage-like cells has been studied using the nanotubes' intrinsic near-infrared fluorescence. Macrophage samples that have been incubated in growth media containing suspended single-walled nanotubes show characteristic nanotube fluorescence spectra. The fl…
The skeletons of adult echinoderms comprise large single crystals of calcite with smooth convoluted fenestrated morphologies, raising many questions about how they form. By using water etching, infrared spectroscopy, electron diffraction, and environmental scanning electron microscopy, we show that sea urchin spine re…
The (1- x )CaZrO 3 –0.1SrTiO 3 – x TiO 2 system with glass frit is synthesized and its dielectric properties, such as dielectric constant, temperature coefficient and dissipation factor, are determined. The addition of 1 wt% glass frit, which consists of CaO, MgO, Al 2 O 3 and SiO 2 , allows this ternary system to be…
Porous alumina with vertical pores having an average diameter of 100 nm was fabricated by the anodization of highly pure aluminum in oxalic acid solution. A solution of 1,2-dichloroethane containing tris(8-quinolinolato)-aluminum(III) (Alq), N , N '-diphenyl- N , N '-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine (TPD…
Abstract The stress–strain diagrams and ultimate tensile properties of uncompatibilized and compatibilized hydrogenated polybutadiene‐ block ‐poly(methyl methacrylate) (HPB‐ b ‐PMMA) blends with 20 wt % poly(methyl methacrylate) (PMMA) droplets dispersed in a low‐density polyethylene (LDPE) matrix were studied. The HP…
The fatigue behavior of ultrafine-grained copper produced by equal channel angular (ECA) pressing was investigated at temperatures between room temperature and 573 K under a constant stress amplitude of 200 MPa. Cyclic softening was found to be much more evident and the corresponding fatigue life decreases rapidly as…
A comparative study on methane and silane derivatives that contain either one or four 2,2‘-dipyridylamino group (dpa) functionalized groups has been carried out. Six new compounds, ( p- dpa-phenyl)triphenylsilane ( 1 ), ( p- dpa-phenyl)triphenylmethane ( 2 ), tetra( p- dpa-phenyl)silane ( 3 ), tetra( p- dpa-phenyl)met…
Crystal structure analyses of a series of three substituted indium phthalocyanines, viz., chloro[1,4,8,11,15,18,22,25-octakis(hexyl)phthalocyaninato]indium(III), 1, 4-fluorophenyl[1,4,8,11,15,18,22,25-octakis(hexyl)phthalocyaninato]indium(III), 2, and racemic chloro[2-bromo-1,4-dibutoxy-8,11,15,18,22,25-hexakis(hexyl)…
We demonstrate the fabrication of metal and semiconductor nanodot arrays on Si by pulsed laser deposition using an anodic alumina membrane as a mask. A Hexagonal-close-packed nanopore membrane mask was fabricated by the anodic oxidation of aluminum sheet. Pulsed laser deposition of Ag, Ni, ZnO, and Er-doped Si (Si:Er)…
A triple-containment magic-angle spinning rotor insert system has been developed and a sample handling procedure formulated for safely analyzing highly radioactive solids by high-resolution solid-state NMR. The protocol and containment system have been demonstrated for magic-angle spinning (MAS) experiments on ceramic…
The reversible cis/trans photoisomerization of secondary thiopeptide bonds has been systematically studied with UV-visible absorption, capillary electrophoresis, 1H NMR spectroscopy, and circular dichroism methods. It was found that the concentration of the cis conformers could be increased from less than 1 % in the t…
The parallel implementation of multireference configuration interaction program based on the hole-particle symmetry is described. The platform to implement the parallelization is an Intel-Architectural cluster consisting of 12 nodes, each of which is equipped with two 2.4-G XEON processors, 3-GB memory, and 36-GB disk…
A nanoporous template which can be used for the preparation of monodispersed metal nanoparticles can have wide-ranging applications in the catalyzed growth of single-walled nanotubes, as well as the preparation of energetic, nanostructured ferromagnetic particle arrays. Here, we found that a honeycomb-like carbon nano…
Nanocast silica (NCS-1) was synthesized by a casting process by employing the mesoporous carbon CMK-3 (the replica of SBA-15) as a template, tetraethoxysilane (TEOS) as the silica source, and hydrochloric acid (HCl) as the catalyst. The ordered carbon template was removed by employing different methods, such as calcin…
Etwa acht Avidinmoleküle sind über Amidbindungen an jedes Ce/Tb-dotierte Lanthanphosphat-Nanopartikel (NP) konjugiert (siehe Schema). Diese Biofunktionalisierung umfasst die Modifizierung der LaPO4-NPs mit 6-Aminohexansäure (AHA), um kolloidale Stabilität zu erreichen, die Aktivierung der AHA-Carboxygruppen mit 1-Ethy…
The mechanism of magnetic interactions in the bulk ferromagnet para-(methylthio)phenyl nitronyl nitroxide crystal (YUJNEW) has been theoretically reinvestigated, using only data from ab initio calculations and avoiding any a priori assumptions. We first calculate the microscopic magnetic interactions (JAB exchange cou…
In tubular nanocomposites prepared from carbon nanotubes and polyaniline, carbon nanotubes can improve the structural ordering, compactness, delocalization of charges and carrier mobility. Such properties are very much critical in the case of organic semiconducting materials for electronics applications. In this paper…
We have investigated the electrochemical behavior, and chemical and photosensitized reduction of two dendrimers based on a 1,3,5-trisubstituted benzenoid core, which contain 9 and 21 4,4'-bipyridinium (usually called viologen) units, respectively, in their branches and are terminated with tetraarylmethane groups. For…
The electronic structure of ferroelectric Sr 0.5 Ba 0.5 Nb 2 O 6 thin film has been studied by soft-X-ray emission spectroscopy (SXES). In the valence band region, O 2 p and Nb 4 d partial densities of states are observed in the O 1 s and Nb 4 p SXES spectra. The energy position of the Nb 4 d state overlaps with that…
Abstract A mathematical model that describes the effect of conversion and polymerization temperature on the porosity of suspension poly(vinyl chloride) is proposed. The model considers that the packing of the primary particles that develop in the polymerizing drop begins at a conversion at which the particles become m…