Materials Literature
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We compare a newly developed hybrid simulation method which combines classical molecular dynamics (MD) and computational fluid dynamics (CFD) to a simulation consisting only of molecular dynamics. The hybrid code is composed of three regions: a classical MD region, a continuum domain where the dynamical equations are…
This letter reports structural results obtained from x-ray scattering measurements performed on individual carbon nanotube carpets. Carpets of aligned multiwalled nanotubes are synthesized by the aerosol pyrolysis method using liquid hydrocarbon∕metallocene aerosols. Nanotube alignment of ±5.5° with respect to the ave…
High-voltage atomic force microscopy is used for nanoscale polarization reversal in LiNbO3 single crystals. The tailored domain patterns have been observed using piezoelectric force microscopy and etching techniques. A variety of domain shapes preserving the elementary crystallographic symmetry have been obtained. It…
Carbon nitride films prepared by magnetron sputtering were studied by multiwavelength Raman spectroscopy. The low/intermediate wavenumber features observed near 400 and $700\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$ are addressed, and the relaxation of the Raman selection rule due to curvature of the…
Transient dynamical studies of ruthenium(II) [5-(4'-ethynyl-(2,2';6',2' '-terpyridinyl))-10,20-bis(2',6'-bis(3,3-dimethyl-1-butyloxy)phenyl)porphinato]zinc(II)-(2,2';6',2' '-terpyridine)2+ bis-hexafluorophosphate (Ru-PZn), osmium(II) [5-(4'-ethynyl-(2,2';6',2' '-terpyridinyl))-10,20-bis(2',6'-bis(3,3-dimethyl-1-butylo…
The effect of chemical heterogeneity of surfaces on the adsorption of proteins was investigated using model surfaces prepared by self-assembly of omega-functionalized alkanethiols on gold substrates. Surface plasmon resonance was used to monitor the adsorption kinetics of bovine serum albumin (BSA) and the morphology…
High-density gallium (Ga)-doped indium oxide (In2O3) nanowires whose Ga content [Ga∕(In+Ga) atomic ratio] is 0%, 7%, and 45%, were synthesized by thermal evaporation. They have an average diameter of 50nm and consist of nearly single-crystalline cubic In2O3 structure with the [010] growth direction. High-resolution x-…
K-doped ZnO films were prepared on Al2O3(0001) substrates by solution deposition. For the prepared thin films of Zn1−xKxO (x=0.002, 0.01, 0.02, 0.05, 0.1), we carried out x-ray diffraction, transmittance spectroscopy, photoluminescence, Hall measurement and x-ray photoemission spectroscopy study, and found that proper…
Hard magnetic materials with high remnant magnetic moment, M r , have unique advantages that can achieve bi-directional (push–pull) movement in an external magnetic field. This paper presents the results on the fabrication and testing of novel composite elastic permanent magnet films. The microsize hard barium ferrite…
Anisotropic nanocomposite R–Fe–B/Fe magnets (R=Pr, Tb) were synthesized by hot pressing and subsequent die upsetting blends of R-rich and R-lean melt-spun ribbons. The magnets have a layered structure, in which alternating layers of the two starting alloys lay perpendicularly to the pressing direction. A crystallograp…
Abstract Using precoated whey protein concentrate gel films as a model milk protein fouling material, the removal kinetics from the inner surface of a stainless steel tube were determined continuously and noninvasively by a rapid UV spectrophotometric method. The influences of temperature, flow velocity, and the amoun…
Rotes Leuchten bei Tageslicht …︁ zur Freude des Chemikers! Effizient wird Anregungsenergie vom angeregten Singulettzustand des Liganden auf die lumineszierenden Zustände des koordinierten EuIII-Ions in 1 übertragen. Nach Anregung mit sichtbarem Licht zeigt der Komplex die charakteristische hellrote Eu-Emission mit ein…
In this paper, we report a single pot synthesis of polyaniline nanoparticles and Au nanoparticle−polyaniline composite nanoparticles using vapor phase introduction of aniline monomer. The synthesis was carried out in a micellar medium using sodium dodecyl sulfate as the micelles. Also, H 2 O 2 was used both to reduce…
Photoluminescent properties of zero-dimensional LaPO4:Eu nanoparticles (NPs) and one-dimensional nanowires (NWs) prepared by the same wet-chemical synthesis technique were studied and compared. The results indicate that in NP Eu3+ occupied only one site, A, while in NW Eu3+ occupied the same site, A and an additional…
Differential scanning calorimetry has been used to study the α -relaxation (glass transition) as well as β -relaxation (sub- T g relaxation) in both virgin polystyrene (PS) and PS−clay nanocomposite. The β -relaxations have been measured as a small endothermic peak that appears on heating of the samples previously ann…
We observe a dramatic enhancement of the fluorescence intensity from single core∕shell CdSe∕ZnS nanocrystals upon sudden exposure to air from an evacuated surrounding. Both the number of particles contributing to emission increases as well as the average emission intensity from a single particle, leading to an overall…
Mathematical model that allows for direct tracking of the homoepitaxial crystal growth out of the window etched in the solid, pre-deposited layer on the substrate is described. The growth is governed by the normal (to the crystal-vapor interface) flux from the vapor phase and by the interface diffusion. The model acco…
In this work we present a reliable technique for the production of large areas of high aspect-ratio patterns and describe their use as model super-hydrophobic systems. The high thickness and straight sidewalls possible with SU-8 were used to generate dense patterns of small pillars. These photoresist patterns could be…
We study Ni80Fe20-based permalloys with the relativistic spin-polarized Korringa-Kohn-Rostoker electronic structure method. Treating the compositional disorder with the coherent potential approximation, we investigate how the magnetocrystalline anisotropy, K, and magnetostriction, lambda, of Ni-rich Ni-Fe alloys vary…
We study numerically some discrete growth models belonging to the class of the nonlinear molecular beam epitaxy equation, or Villain-Lai-Das Sarma (VLDS) equation. The conserved restricted solid-on-solid model (CRSOS) with maximum heights differences H_m=1 and H_m=2 was analyzed in substrate dimensions d=1 and d=2. Th…