Materials Literature
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Using first-principles calculations, we investigate the effect of tube size on optical properties of the zigzag, armchair, and chiral SiC nanotubes. The results indicate that the optical spectra of SiC nanotubes are dependent on the diameter and chirality, and that optical anisotropy is observed for different light po…
The syntheses and structural elucidations of three different cobalt complexes of m-benziphthalocyanine are reported; both Co(II) and Co(III) complexes can be generated, and the ring undergoes partial oxidation upon metalation with Co(OAc)2x4H2O.
Consistent particle properties are an important goal for industrial batch crystallizations. Several control strategies, from unseeded linear cooling to seeded supersaturation control, were evaluated for the cooling crystallization of glycine. Particle properties were assessed in-line, facilitating investigations of pr…
Hydrothermal synthesis of beta-Ni(OH)(2) was performed inside uniform carbon-coated nanochannels of an anodic aluminium oxide film. The time course of crystal formation and growth of Ni(OH)(2) in such one-dimensional nano space was observed using transmission electron microscopy (TEM), and the changes in the number an…
Nanowires of molecule-based charge-transfer salts are prepared using two different processing techniques. Isolated [TTF][TCNQ] nanowires are grown by a simple adsorption in organic solution method on stainless steel conversion coatings, used as substrates. They are characterized by Raman spectroscopy and current–volta…
The cathodic kinetics of 3000 Å thick La2NiO4+δ (LNO) films were studied using AC impedance spectroscopy at 400–620 °C and in 0.01–1.0 atm O2. The dense polycrystalline LNO films were deposited on both sides of yttrium stabilized zirconia (YSZ) (100) single crystal substrates by pulsed laser deposition (PLD). Three di…
Americanae nace como un proyecto conjunto que surge dentro de la Red Europea de Información y Documentación sobre América Latina (REDIAL), y que ha afrontado la Biblioteca de la Agencia Española de Cooperación Internacional para el Desarrollo (AECID). Esta nueva biblioteca virtual hace más accesibles los libros digita…
Linear measurements of 31 Southern Ocean diatom species or genus groupings are presented and used in the derivation of species-specific biovolume, biomass and surface to volume ratios. Species measurements are in tune with summarised values in the literature and range from 2.6 to 2296 pm in length and 8.5 to 140 pm in…
We demonstrate the ability to image cancerous cells in three-dimensional tissue phantoms utilizing the bright two-photon luminescence from molecularly targeted gold nanorods. Nanorod labeled cells provide three orders-of-magnitude more signal than autofluorescence from unlabeled cells.
Abstract Bulk glass formation occurs over a very small part of phase space, and ‘good’ glasses (which form even at low quench rates ∼10 K/sec) select an even smaller part of that accessible phase space. An axiomatic theory provides the physical basis of glass formation, and identifies these sweet spots of glass format…
Current clinical therapies for traumatic or chronic injuries involving osteochondral tissue result in temporary pain reduction and filling of the defect but with biomechanically inferior repair tissue. Tissue engineering of osteochondral repair tissue using autologous cells and bioactive biomaterials has the potential…
. Apollo Diamond Inc. of Boston, Massachusetts, demonstrated its ability to grow single-crystal CVD synthetic diamonds of moderate gem quality several years ago For the most part, the samples examined in 2003 were relatively small and of limited thickness for faceting purposes. Nearly all of these early crystals were…
The concept of 'size' in polymer science can have several interpretations, including definitions that rely on either statistical or equivalent-hard-sphere measures of the spatial extent of macromolecules in solution. A definition such as that of the equivalent thermodynamic radius (R(T)), which relies on the second vi…
The overall six-electron oxidation of water soluble porphyrin Fe(III)TPPS by hydrogen peroxide and peroxomonosulfate ion was studied by the stopped-flow method with UV-vis detection. A three-step consecutive reaction was observed with two intermediates: Fe(III)TPPS --> Int(1)--> Int(2)--> products. The products were i…
The redox reactions of 4 mmol L-1 K4[Fe(CN)6] species have been studied with Single-Walled Carbon Nanotube (SWNT)-coated Glassy Carbon Electrode (GCE), SWNT-coated Gold Electrode (GE) and lab-made SWNT-film (SWNT-Thin-Paper-Like-Film) Electrodes individually. The SWNT-modified (physically) electrode has shown a well-d…
Tumour-targeted delivery of therapeutic agents is a longstanding pharmacological goal to improve selectivity and Therapeutic Index. Most scientists have sought to use 'active' receptor-mediated tumour-targeting systems, however the 'passive' targeting afforded by the Enhanced Permeability and Retention (EPR) effects p…
A family of nanostructured polyaniline (PANI) materials including polystyrene (PS)/PANI core/shell particles, PANI hollow spheres, PANI/PS nanocomposite and nanoporous PANI, were conveniently prepared by surface charge control of PS nanoparticle templates which resulted in different polymer growth mechanisms when PANI…
In this work programming and retention statistics in phase change memory arrays are discussed and modeled. In particular, we provide a) an analytical, empirical model for set, reset and retention statistics and b) a physics-based retention model based on crystallization in presence of composition fluctuations at the n…
Composites made from hemp and polypropylene were prepared in order to determine the effect of fibre and coupling agent content on their mechanical properties. The samples were prepared by compression molding after an initial melt blending and homogenization step in an internal batch mixer. Different fibre contents (0,…
The facile preparation of a mesoporous magnetic carrier technology is demonstrated. The micron-sized spherical mesostructured particles are prepared using a newly-developed, one-step, combined emulsion and solvent evaporation (ESE) method. The surfactant-templated silica matrix display a well-ordered internal pore arc…