Materials Literature
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Self-assembled multilayers of azobenzene polyelectrolytes produced a reversible change in surface energy that is stable over time, in a host material that is biocompatible for eventual applications of directed cell growth.
The effect of 170 keV Si and 100 keV C ion bombardment on the structure and properties of highly pure, double-wall carbon nanotubes has been investigated using resonance Raman spectroscopy. The implantations were performed at room temperature with ion doses ranging between $1\ifmmode\times\else\texttimes\fi{}{10}^{13}…
With the numerical calculation of the spectrum of single bubble sonoluminescence, we find that when the maximum temperature inside a dimly luminescing bubble is relatively low, the spectral lines are prominent. As the maximum temperature of the bubble increases, the line spectrum from the bright bubble weakens or even…
Magnetic and dielectric properties of Eu1-xYxMnO3 (x=0 and 0.4) are studied in pulsed magnetic fields up to 55 T. For x=0, application of magnetic fields higher than 20 T along the b axis causes magnetic transitions accompanied by generation of electric polarization (P) along the a axis. Similar first-order transition…
Metallic nanoparticles are known to exhibit strong particle size dependent localized surface plasmon resonances due to their specific optical response described via the complex dielectric function. Using the two-dimensional finite element method, the near-field behavior of core-shell nanocylinder dimers with either a…
Abstract The objective of this paper is to know the fire performance of wooden panels ( Pinus radiata ) impregnated with silica nanoparticles added to silica/alkali colloidal solutions. Two series of impregnated panels were prepared with diverse penetrations and retentions (a) after drying/curing the impregnants at la…
Abstract A description of the electronic properties of model zigzag carbon nanotubes (CNTs) and chiral‐edge graphene nanoribbon using a computational method for accelerating first‐principles Green function calculations is presented. This approach utilizes an optimal basis set for representing the polarization propagat…
The thread-like adhesive tissue of the green mussel, Perna viridis, is referred to as the byssus. The phenol gland-derived proteins are involved in the underwater adhesion of the byssus. The objectives of the present study are identification and characterization of the phenol gland-derived proteins in the foot of P. v…
New covalently C60-connected zinc phthalocyanine (ZnPc) derivatives have been synthesized by utilizing successive cycloaddition reactions of C60 with a ZnPc derivative containing a pyridazine moiety employing Komatsu's method in reaction of C60 with phthalazine. The UV/Vis absorption spectrum of the fused conjugate (5…
The magnetic exchange coupling constants between two Mn(II) centers for a set of five inverse crown structures have been investigated by means of a methodology based on broken-symmetry unrestricted density functional theory. These novel and highly unstable compounds present superexchange interactions between two Mn ce…
Abstract The solid–liquid equilibrium of precursors and products of the enzymatic synthesis of ampicillin (AMP) [6‐aminopencillanic acid (6‐APA) and D(−)phenylglycine (PG)] was investigated at different temperatures (283–298 K) and pHs (5.5–7.5). Solubility data were obtained using an analytical methodology. Equilibri…
Abstract A density gradient ultracentrifugation (DGU) technique recently applied for separation of single‐wall carbon nanotubes (SWNTs) over diameter also appeared to be efficient for the nanotube separation according to their electronic structure. In this work we used DGU for extraction of a highly metallic (>97 w…
A systematic simulation methodology is introduced for the accurate determination of experimentally measurable quantities characterizing solid-solid phase transformations under pressure. The atomistic mechanisms of nucleation and growth in a structural transformation of pressurized CdSe nanocrystals are identified usin…
Nanocomposites of Fe−Co alloy and cobalt-substituted magnetite magnetic materials Fe x Co 1− x /Co y Re z Fe 3− y − z O 4 (Re = none, La, Nd, and Gd) have been obtained successfully employing a surfactant-assisted solvothermal method. The nanocomposite features hard and soft magnetic phases juxtaposed within one discr…
Secondary ion mass spectroscopy (SIMS) was used to investigate carbon impurity concentrations in stoichiometric SrTiO3 films grown by a hybrid molecular beam epitaxy approach that uses an effusion cell to supply strontium, a rf plasma source for oxygen and a metal organic titanium source (titanium tetra isopropoxide).…
N-doped ZnS nanoparticles with wurtzite phase was synthesized at 150 °C, derived from an inorganic−organic complex, ZnS·(piperazine) 0.5 . The metastable ZnS·(piperazine) 0.5 nanohybrid materials could be described as the layered structure where wurtzite ZnS layers are connected to each other through the bondings of n…
Abstract Recent research into the channelling of few layer graphene via catalytic hydrogenation using metallic catalyst nanoparticles shows that this technique is potentially a key engineering route for graphene nanoribbon fabrication with atomic precision. In this contribution we utilized gas phase prepared cobalt na…
Motivated by the realization of the Dirac point (DP) with a double-cone structure for optical field in the negative-zero-positive index metamaterial (NZPIM), the reflection, transmission, and Goos-H\"anchen (GH) shifts inside the NZPIM slab are investigated. Due to the linear Dirac dispersion, the transmission as the…
Kevlar-coated multiwalled carbon nanotubes have been prepared and used as additives to reinforce selected commercially available polymers (polyvinyl chloride, polystyrene, and polyvinyl acetate). It was found that the mechanical properties of the nanotube−polymer composites strongly depend on the nature of polymer and…
In this study, a monolithic honeycomb catalyst is being used in a SCR reactor rather than pellet catalyst in many conventional gas−solid catalytic processes because the advantages of honeycomb matrix are very low pressure drop, high geometric specific surface area, and resistance to deposition of carbon and dust. The…