Materials Literature
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We show that the pitfalls encountered in earlier calculations of the RKKY range function for a noninteracting one-dimensional electron gas at zero temperature can be unraveled and successfully dealt with through a proper handling of the impurity potential.
In this paper, transparent flexible substrates based on polyimides (PIs) with aluminum doped zinc oxide (AZO) thin films for organic electroluminescent devices have been prepared. PI film based on 2,2'-bis-(3,4-dicarboxyphenyl) hexafluoropropanedianhydride (6FDA) and 2,2'-bis-(trifluoromethyl)-4,4'-diaminobiphenyl (TF…
We perform molecular dynamics (MD) simulations using the extended simple-point-charge (SPC/E) model for water to study the structural relaxation through the glass transition region. We follow the same standard protocol used in differential scanning calorimetry experiments. Specifically, we cool liquid configurations a…
The mixed form of alpha/beta lactose was obtained by heating amorphous alpha-lactose at 443 K. NMR spectroscopy determined the stoichiometry of this mixed compound to be 1/1. The X-ray powder diffraction pattern was recorded at room temperature with a sensitive curved detector (CPS 120). The structure was solved by re…
A blend of poly(epsilon-caprolactone) (PCL) and poly(vinyl chloride) (PVC) with 90 wt % PCL was prepared. Two films of this blend, which were grown at 35 and 45 degrees C, showed the absence and presence of banded spherulites, respectively. A detailed examination conducted with time-of-flight secondary ion mass spectr…
The heat dissipation in GaN devices grown on low thermal conductivity lithium gallate (LGO) substrates was investigated. The thermal conductivity of single-crystal LGO was measured utilizing the 3/spl omega/ technique for temperatures ranging from 100 K-500 K. For the GaN layer, the thermal conductivity was estimated…
We present a new opportunity for the investigation of the dynamics of electrostatic ultrathin-film assembly and the elucidation of time scales required for layer-by-layer adsorption of polyelectrolytes using a novel pendant drop technique which allows for the synthesis of free-standing nanocomposites. In short, a char…
The magnetism of the ferromagnetic half-metallic Heusler compounds at the interface with other metals, insulators, and semiconductors is a critical issue when judging the prospects for these materials to be used in future spintronic devices. We study the interface magnetism of the ferromagnetic half metal ${\mathrm{Co…
Summary In soils in general, the cation exchange capacity is an important factor in soil fertility because it determines both cation retention and selectivity, and in turn controls most of the other soil properties. The main goal of this paper was to estimate the cation exchange capacity (CEC) and the contribution of…
We study the kinetics of domain growth of fluid mixtures quenched from a disordered to a lamellar phase. At low viscosities, in two dimensions, when hydrodynamic modes become important, dynamical scaling is verified in the form C ( k , t ) ∼ L α f [( k − k M ) L ], where C is the structure factor with maximum at k M a…
We study a system of colloidal spheres with induced magnetic dipoles confined in two-dimensional (2D) hard-wall channels using Brownian dynamics simulations. The external magnetic field is directed normal to the 2D plane and therefore the colloids interact with a purely repulsive r(-3) potential. The effects of confin…
Wautersia eutropha H16 (formerly Ralstonia eutropha) mobilizes intracellularly accumulated poly(3-hydroxybutyrate) (PHB) with intracellular poly(3-hydroxybutyrate) depolymerases. In this study, a novel intracellular 3-hydroxybutyrate-oligomer hydrolase (PhaZc) gene was cloned and overexpressed in Escherichia coli. The…
Riesenspins: Die Strukturen der gemischtvalenten {MnIII20−xMnIIx}-Käfigkomplexe (x=2–6) entsprechen einem Fragment des kubisch-dichtgepackten Gitters (siehe Bild; Mn große Kugeln, O kleine Kugeln). Magnetismusuntersuchungen ergaben für den Käfig mit x=2 bei schwachem Feld einen Grundzustandsspin S von 19±1, der bei st…
The orientation dependence of the free induction decay (FID) of 1H NMR water signal in ex vivo bovine digital flexor tendon at the native level of hydration is reported. Residual dipolar coupling due to the overall tissue anisotropy produces a 6:1 change in the signal intensity as an angle between the long axis of a s…
Abstract Novel polycarbonates, with pendant functional groups, based on 1,4:3,6‐dianhydrohexitols and L ‐tartaric acid derivatives were synthesized. Solution polycondensations of 1,4:3,6‐dianhydro‐bis‐ O ‐( p ‐nitrophenoxycarbonyl)hexitols and 2,3‐di‐ O ‐methyl‐ L ‐threitol or 2,3‐ O ‐isopropylidene‐ L ‐threitol affor…
Abstract For Abstract see ChemInform Abstract in Full Text.
The fundamental temperature-dependent parameters of a thermoelectric module (TEM), such as Seebeck coefficient, electrical resistance, thermal conductance, and figure-of-merit are necessary, among other factors, for conception of models for this type of devices. This paper presents a new methodology to experimentally…
Surface-enhanced Raman scattering spectra of chemical and biological agent simulants, such as dimethyl methylphonate, pinacolyl methylphosphonate, diethyl phosphoramidate, 2-chloroethyl ethylsulfide, bacillus globigii, erwinia herbicola, and bacillus thuringiensis were obtained from silver-oxide film-deposited substra…
The field acceleration factor (/spl gamma/) for the E-model of time-dependent dielectric breakdown (TDDB) in various Cu interconnect structures has been studied. The /spl gamma/ for pSiCN structures is larger than that of pSiN structures and independent of the kind of interlayer dielectric material or other processes…
Materials exhibiting low-field magnetoelectric and magnetodielectric (MD) effects are necessary for utilization of these effects in multifunctional devices. Since large magnetic fields (H) or electric fields (E) are required to produce any significant effect in existing single-phase magnetoelectrics, recent efforts ha…