Materials Literature
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Four compositions in the Sr 1–3 x /2 Ce x TiO 3 homologous series, corresponding to x = 0.1333, 0.1667, 0.25, and 0.4, have been produced by conventional solid-state processing. The structure of these compounds was analyzed by X-ray, electron, and neutron diffraction. While no superlattice can be observed via X-ray di…
While the polarization sensitivity of single or aligned NW ensembles is well-known, this article reports on the existence of residual photocurrent polarization sensitivities in random NW networks. In these studies, CdSe and CdTe NWs were deposited onto glass substrates and contacted with Au electrodes separated by 30-…
This study evaluates the supramolecular reactivity of the 5-(4′-pyridyl)-10,15,20-tris(4′-iodophenyl)porphyrin (PyTIPP) and 5,15-bis(4′-pyridyl)-10,20-bis(4′-iodophenyl)porphyrin (PyDIPP) platforms in their free base and metalated forms, utilizing metal–ligand coordination and halogen bond synthons in the construction…
We prepared a Au/CeO 2 (111) model catalyst by depositing a thin cerium oxide film on a Ru(0001) surface and subsequently depositing gold. This model system was investigated using high-resolution photoemission spectroscopy. Gold forms metallic nanoparticles on CeO 2 with an average particle size that depends on the Au…
Colloidal GaAs quantum wires with diameters of 5-11 nm and narrow diameter distributions (standard deviation = 12-21% of the mean diameter) are grown by two methods based on the solution-liquid-solid (SLS) mechanism. Resolved excitonic absorption features arising from GaAs quantum wires are detected, allowing extracti…
The effect of different solvents including methanol, pyridine, acetone, dichloromethane, and isopropanol on the crystal structure or habit of hydrocortisone (HC) were studied using X-ray diffraction (XRD) or scanning electron microscopy. It was found that solvent had a significant impact on HC structure and morphology…
A method is described for assembling gold nanorods into one-, two-, and three-dimensional superstructures. The addition of dimercaptosuccinic acid (DMSA) into the nanorod solution was found to induce self-assembly of the latter to one-dimensional "tapelike", two-dimensional "sheetlike" and three-dimensional "superlatt…
The dynamics of electron transfer across Au electrodes modified by ultrathin polyelectrolyte multilayers (PEM) and a diluted monolayer of Au nanoparticle was investigated as a function of the film thickness. Au electrodes were sequentially modified by a self-assembled monolayer of 11-mercaptoundecanoic acid (MUA), fol…
The multichromophoric dyads 1, 2 and triad 3 have been synthesized by coupling of the appropriately functionalized chlorin derivative with naphthalene diimide dyes through esterification, and subsequent metalation of the chlorin center with zinc acetate. The self-assembly properties of naphthalene diimide (NDI)-zinc c…
We study a doubly-degenerate orbital model on a honeycomb attice. This is a model for orbital states in multiferroic layered iron oxides. The classical and quantum models are analyzed by spin-wave approximation, Monte-Carlo simulation and Lanczos method. A macroscopic number of degeneracy exists in the classical groun…
The impact of PEGylation on the pharmacokinetics and biodistribution of (3)H-labeled poly l-lysine dendrimers has been investigated after intravenous administration to rats. The volumes of distribution, clearance and consequently the plasma half-lives of the PEGylated dendrimers were markedly dependent on the total mo…
We have performed x-ray photoemission spectroscopy (XPS), x-ray absorption spectroscopy (XAS), and resonant photoemission spectroscopy (RPES) measurements of Mn-implanted 3$C$-SiC (3$C$-SiC:Mn) and carbon-incorporated Mn$_{5}$Si$_{2}$ (Mn$_{5}$Si$_{2}$:C). The Mn 2$p$ core-level XPS and XAS spectra of 3$C$-SiC:Mn and…
We report the direct observation of the spin-singlet dark excitonic state in individual single-walled carbon nanotubes through low-temperature micro-photoluminescence spectroscopy in magnetic fields. A magnetic field up to 5 T, applied along the nanotube axis, brightened the dark state, leading to the emergence of a n…
We present spin wave dispersions in MnO, NiO, and $α$-MnAs based on the quasiparticle self-consistent $GW$ method (\qsgw), which determines an optimum quasiparticle picture. For MnO and NiO, \qsgw results are in rather good agreement with experiments, in contrast to the LDA and LDA+U description. For $α$-MnAs, we find…
The full-potential linearized augmented plane wave (FP-LAPW) method with the generalized gradient approximation (GGA) for the exchange-correlation potential has been applied to predict the elastic properties of quaternary oxyarsenide LaOFeAs - the basic phase for the newly discovered 26-52K superconductors. The optimi…
Super-compressible foam-like carbon nanotube films have been reported to exhibit highly nonlinear viscoelastic behaviour in compression similar to soft tissue. Their unique combination of light weight and exceptional electrical, thermal and mechanical properties have helped identify them as viable building blocks for…
Molecular dynamics simulations are used to investigate the diffusion process of nanoparticles in polymer melts. The effects of size, concentration, and mass of the particle, chain length, and polymer−particle interaction on the diffusion of particles in polymer melts are also explored. Our simulated results indicate t…
The plasmonic properties of arrays of supported Al nanodisks, fabricated by hole-mask colloidal lithography (HCL), are analyzed for the disk diameter range 61-492 nm at a constant disk height of 20 nm. Strong and well-defined (UV-vis-NIR) localized surface plasmon resonances are found and experimentally characterized…
Cover: Three key research fronts can be considered to improve the mechanical recycling activities and therefore extend the life cycle of polymeric materials: scientific knowledge about the degradation processes during first use and subsequent recycling, development of reliable quality analysis procedures for recycled…
In the search for non-lithographic methods for pattern formation on semiconductor surfaces, a facile self-assembly method relying on Au-assisted thermal annealing is employed to obtain rectangular and square micro-patterns on single crystal Ge surfaces. Such patterns can be exploited for the templated growth of biomat…