Materials Literature
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We present realistic simulations of quantum confinement effects in phase-coherent graphene quantum dots with linear dimensions of 10--40 nm. We determine wave functions and energy-level statistics in the presence of disorder resulting from edge roughness, charge impurities, or short-ranged scatterers. Marked deviation…
The unique properties of gold especially in low temperature CO oxidation have been ascribed to a combination of various effects. In particular, particle sizes below a few nanometers and specific particle−support interactions have been shown to play important roles. In contrast, recent reports revealed that monolithic…
In the presence of poly(vinylpyrrolidone) and I(-), uniform Pd nanowires and nanorods have been successfully prepared. As-prepared one-dimensional Pd nanostructures have a 5-fold twinned structure. The twinned Pd nanowires can be further transformed into nanowires/nanorods with a smaller aspect ratio and finally to mu…
SERS permits identifying the nature of molecules in extremely low concentrations, but it is hindered by poor enhancement or low reproducibility. We demonstrate controllable approximately 10(10) signal amplification reaching the zeptomol detection limit for a nonresonant molecule by sandwiching the analyte between the…
Here we demonstrate that superheated water is a solvent for polyamide 2,14 and piperazine-based copolyamides up to a piperazine content of 62 mol %. The incorporation of piperazine allows for a variation of the hydrogen bond density without altering the crystal structure (i.e., the piperazine units cocrystallize with…
Electrochromism is extensively investigated for practical application of display and memory devices. To develop the material, reliable information on the optical and electronic properties of the solid film is indispensable. Here, we propose valence-differential spectroscopy that can selectively extract the spectral co…
We report a combinatory approach to correlate physical properties with microstructure of individual nanowires (NWs). The mechanical and electrical-transport properties of individual ${\text{Nb}}_{2}{\text{O}}_{5}$ NWs are determined experimentally and correlated with the microscopic structures of the same NW. The obse…
Plasma-polymerized organosilicon materials with controlled physicochemical properties seem to be promising materials for surface modification of glass fibers (GF) used as reinforcement for GF/polyester composites with a controlled interphase [1]. The deposited film must be a compatible interlayer forming a strong link…
We report the controlled growth of one-dimensional clusters of molybdenum atoms inside the inner cores of double-walled carbon nanotubes. A combined characterization including high resolution transmission electron microscopy, nitrogen adsorption measurement at 77 K, x-ray photoelectron spectroscopy, Raman spectroscopy…
A constitutive model for rate-dependent and thermomechanically coupled plasticity at finite strains is presented. The plasticity model is based on a J2 model and rate-dependent behavior is included by use of a Perzyna-type formulation. Adiabatic heating effects are handled in a consistent way and not, as is a common a…
Hydrocracking catalysts are bifunctional, associating a hydro–deshydrogenating function with an acidic one. If gas oil is the required product, NiW/silica–alumina is the most appropriate catalyst. It is obtained through the sulfidation of an oxidic precursor that is prepared by incipient wetness impregnation of the su…
The effect degradation in-service and in-laboratory conditions of the low-alloyed steels and aircraft aluminum alloys on its electrochemical conditions has been investigated. It is shown that the structural changes over degradation causes not only material embitterment, but also an activation of anodic and cathode ele…
In this paper, we studied phase modulation numerically using metamaterials such as stacked structures of dual split ring resonators (DSRRs). To demonstrate the modulation, a vertical and a planar design were considered, where the wave vectors were parallel and perpendicular to the proposed structures creating 70 degre…
The photofading of phenylazo‐aniline, ‐pyridone and ‐quinolone disperse dyes on nylon fabric was analysed using the Kubelka–Munk ( K / S ) spectra of fabrics exposed to a carbon arc in air. The exposure of dyed fabric through ultraviolet and coloured filters, which do not shield the main absorption band, showed a larg…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
The addition of nitrogen to the synthesis gas during synthesis of ultrananocrystalline-diamond (UNCD) films results in films uniquely exhibiting very high n-type electrical conductivity even at ambient temperatures. This result is due to the formation of nanowires having elongated diamond core nanostructures and a sp2…
Abstract By using first‐principles calculations, the authors investigate the structural, mechanical, and electronic properties of experimentally synthesized Os 0.5 W 0.5 B 2 . The calculated structural parameters and elastic properties are in good agreement with the experimental results. In addition, two new 5d transi…
Under compression, the As-S liquids are subject to transformations, including polymerization and metallization. We have measured the viscosity of the As-S liquids under high pressures. As a result, large viscosity variations by 4-5 orders of magnitude have been revealed. The viscosity values of the As-S liquids are mo…
CYP175A1 from Thermus thermophilus is a thermophilic cytochrome P450 and has great potential for industrial applications. However, a native electron transport system for CYP175A1 has not been identified. Here, an electron transport system for CYP175A1 was isolated from T. thermophilus HB27 by multistep chromatography,…
We studied the magnetic field dependence of the resonance frequency (fr) and frequency linewidth (Δf) of iron oxide nanoparticles (Fe3O4) with different particle sizes spin-coated on a coplanar waveguide. Using a vector network analyzer, we find that the resonance frequency increases with an increase in applied field…