Materials Literature
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Global kinetics for the oxidation of diesel fuel (DF), propylene (C 3 H 6 ), CO, H 2, and NO were determined over a commercial diesel oxidation catalyst (DOC) with simulated diesel exhaust between 200 and 415 °C over a wide concentration range intended to represent engine exhaust from both conventional and premixed co…
Abstract A novel solution spinning method to produce highly conducting carbon nanotube (CNT) biofibers is reported. In this process, carbon nanotubes are dispersed using biomolecules such as hyaluronic acid, chitosan, and DNA, and these dispersions are used as spinning solutions. Unlike previous reports in which a pol…
Ionic-complementary peptides are novel nano-biomaterials with a variety of biomedical applications including potential biosurface engineering. This study presents evidence that a model ionic-complementary peptide EAK16-II is capable of assembling/coating on hydrophilic mica as well as hydrophobic highly ordered pyroly…
A major obstacle in drug delivery is the inability to effectively deliver drugs to their intended biological target without deleterious side-effects. Delivery vehicles such as liposomes can minimize toxic side-effects by shielding the drug from reaction with unintended targets while in systemic circulation. Liposomes…
An orbital ordering transition and electronic phase coexistence have been discovered in SrCrO3. This cubic, orbitally-degenerate perovskite transforms to a tetragonal phase with partial orbital order. The tetragonal phase is antiferromagnetic below 35-40 K, whereas the cubic phase remains paramagnetic at low temperatu…
Using the finite-difference time-domain method, we investigate the plasmonic mode spectrum of a metallic nanostructure consisting of a concentric arrangement of a solid disk and a surrounding ring. We demonstrate that the energies of the plasmon modes depend sensitively on the structural parameters of the disk and the…
Two available theories of melting in extended chain polymer crystals are critically examined and compared with calorimetric data. Melting points, T m , and enthalpy of fusion, ΔH, have been measured for extended-chain crystals of poly(ethylene-oxide) fractions, covering a wide range of molecular weights. It appears th…
This is the second paper of a series of three investigating, by numerical means, the geometric and mechanical properties of spherical bead packings under isotropic stresses. We study the effects of varying the applied pressure P (from 1 or 10 kPa up to 100 MPa in the case of glass beads) on several types of configurat…
In this third and final paper of a series, elastic properties of numerically simulated isotropic packings of spherical beads assembled by different procedures and subjected to a varying confining pressure P are investigated. In addition P, which determines the stiffness of contacts by Hertz's law, elastic moduli are c…
Polyoxomolybdates (PMs) as discrete molybdenum-oxide cluster anions have been investigated in the course of study of their medical applications. Here, we show the significant antitumour potency of the polyoxomolybdate [Me(3)NH](6)[H(2)Mo(V)(12)O(28)(OH)(12)(Mo(VI)O(3))(4)].2H(2)O (PM-17), which is a photo-reduced comp…
Gold nanoparticles (Au−PS) coated with an areal chain density Σ of end-attached polystyrene (PS) chains of different molecular weights ( M n ) are added to a lamellar diblock copolymer of poly(styrene- b -2-vinylpyridine) (PS- b -P2VP) to determine the critical areal chain density Σ C below which the Au−PS nanoparticl…
Molecular beam epitaxy of Fe3Si on GaAs(001) is studied in situ by grazing incidence x-ray diffraction. Layer-by-layer growth of Fe3Si films is observed at a low growth rate and substrate temperatures near 200 degrees Celsius. A damping of x-ray intensity oscillations due to a gradual surface roughening during growth…
Superhydrophobicity of natural surfaces has recently been studied intensively with the aim of designing artificial surfaces. However, the role of hierarchical structures in such surfaces has not been completely understood. Based on thermodynamic free energy analysis, we reveal that the harmonious combination of hydrop…
The electronic structure of a monolayer of single-molecule magnets ${\mathrm{Mn}}_{12}$ on a Au(111) surface is studied using spin-polarized density-functional theory. The ${\mathrm{Mn}}_{12}$ molecules are oriented such that the magnetic easy axis is normal to the surface, and the terminating ligands in the ${\mathrm…
We present here magnetization, specific heat and Raman studies on single-crystalline specimens of the first pyrochlore member $Sm_2Ti_2O_7$ of the rare-earth titanate series. Its analogous compound $Sm_2Zr_2O_7$ in the rare-earth zirconate series is also investigated in the polycrystalline form. The Sm spins in $Sm_2T…
We introduce a novel algorithm to perform event-driven simulations of hard rigid bodies of arbitrary shape, that relies on the evaluation of the geometric distance. In the case of a monodisperse system of uniaxial hard ellipsoids,we perform molecular dynamics simulations varying the aspect-ratio X0 and the packing fra…
We present a combined experimental and theoretical study of the effects of pressure on T_c of the hexagonal layered superconductors nH-CaAlSi (n = 1, 5, 6), where nH labels the different stacking variants that were recently discovered. Experimentally, the pressure dependence of T_c has been investigated by measuring t…
We report on the structural and magnetic characterization of (110) and (001) ${\mathrm{La}}_{2∕3}{\mathrm{Ca}}_{1∕3}\mathrm{Mn}{\mathrm{O}}_{3}$ (LCMO) epitaxial thin films simultaneously grown on (110) and $(001)\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ substrates, with thicknesses $t$ varying between 8 and $150\phanto…
Conceptual studies and numerical simulations are performed for imaging devices that transform a near-field pattern into magnified far-zone images and are based on high-order spatial transformation in cylindrical domains. A lens translating a near-field pattern from an almost circular input boundary onto a magnified fa…
We have prepared various poly(N-isopropylacrylamide) (PIPAAm)-grafted silica bead surfaces through surface-initiated atom transfer radical polymerization (ATRP) by changing graft densities and brush chain lengths. The prepared surfaces were characterized by chromatographic analysis using the modified silica beads as c…