Supramolecular Gels: Functions and Uses
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Single‐Site Heterogeneous Catalysts
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Modeling the effects of an individual SRR by equivalent circuit method
This paper proposes a novel theoretical equivalent circuit model to characterize the split ring resonator (SRR), based on the analysis of the individual SRR geometry configuration and the distribution relationship of the electric charge and electric current in it. Then the telegrapher equations are obtained to develop…
Photoluminescence of Si nanocrystal memory devices obtained by ion beam synthesis
In this letter, we propose an original method to investigate Si nanocrystal-based nonvolatile memory devices, taking benefit of the photoluminescence (PL) spectroscopy and the specific optoelectronic properties of Si nanocrystals (Si-NCs). Ordered two-dimensional-arrays of Si-NCs were synthesized by ultralow-energy io…
Rubberlike Dynamics in Sulphur above theλ-Transition Temperature
The high-frequency acoustic dynamics of sulfur across the liquid-liquid, lambda transition has been studied using inelastic x-ray scattering. The combination of these high-frequency data with lower frequency, literature data indicates that liquid sulfur develops, in the high-temperature, polymeric solution phase, some…
NMR Investigation of the Behavior of an Organothiophosphate Pesticide, Methyl Parathion, Sorbed on Clays
The decomposition of methyl parathion (an organothiophosphate pesticide) sorbed on partially hydrated kaolin and montmorillonite clays (in Ca2+, Cu2+, Zn2+, and Al3+ forms) at high concentration (typically 1-10 wt %) has been examined by nuclear magnetic resonance (NMR), using solid-state 31P NMR (based on magic-angle…
Time-resolved analysis of the set process in an electrical phase-change memory device
An experimental investigation was carried out on the kinetic nature of the set process in a phase change memory device by combined analyses of set voltage wave forms and time-resolved low-field resistances. As it turned out, the progress of a set process may be measured in terms of three characteristic times in sequen…
Influence of Natural Biomaterials on the Elastic Properties of Starch-Derived Films: An Optimization Study
A D-optimization design was applied to investigate the strength properties of biomaterial-doped starch films. The individual effect of each additive and associated interactive effects were investigated. Cellulosic fibers and chitosan were able to substantially enhance film strength. Lignin and gelatin also demonstrate…
Fundamental Transmitting Properties of Carbon Nanotube Antennas
P.J. Burke et al. (see http://xxx.lanl.gov/abs/cond-mat/0408418) considered carbon nanotube dipole antennas based on a transmission-line model. This paper investigates fundamental properties of dipole antennas formed by carbon nanotubes using a Halle/spl acute/n's-type integral equation. The input impedance, radiation…
Synthesis of Carrier‐Transporting Dendrimers with Perylenebis(dicarboximide)s as a Luminescent Core
Abstract Well‐defined, modular dendrimers enable processing techniques and electronic properties to be tuned independently. Moreover, the dendritic topology can isolate the core chromophore, thus reducing or eliminating strong intermolecular interactions. This paper presents the synthesis of three series of flexible,…
Carbonate and Phosphate Precipitation byChromohalobacter marismortui
The ability of Chromohalobacter marismortui to precipitate carbonate and phosphate minerals has been demonstrated for the first time. Mineral precipitation in both solid and liquid media at different salts concentrations and different magnesium/calcium ratios occurred whereas crystal formation was not observed in the…
Hybrid Energy Sources for Electric and Fuel Cell Vehicle Propulsion
Given the energy (and hence range) and performance limitations of electro-chemical batteries, hybrid systems combining energy and power dense storage technologies have been proposed for electric vehicle propulsion. The paper will discuss the application of electro-chemical batteries, supercapacitors and fuel cells in…
Optical properties of nanocluster-assembled ZnO thin films by nanocluster-beam deposition
Nanocluster-assembled ZnO thin films have been synthesized by nanocluster-beam deposition, and the films exhibit a band-gap energy at 323.7nm (3.84eV) and ultraviolet (UV) light emission at 373nm (3.32eV) with an average particle size of 6nm. A comparison of the optical properties of the annealed films with that of as…
Interferometric Study on the Adsorption-Dependent Refractive Index of Silicalite Thin Films Grown on Optical Fibers
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTInterferometric Study on the Adsorption-Dependent Refractive Index of Silicalite Thin Films Grown on Optical FibersJian Zhang, Ming Luo, Hai Xiao, and Junhang DongView Author Information Department of Chemical Engineering, Petroleum Recovery Research Center, and Depart…
The Present and Projected Performance and Cost of Double-layer and Pseudo-capacitive Ultracapacitors for Hybrid Vehicle Applications
The performance of carbon/carbon double-layer and pseudo-capacitive ultracapacitors are assessed based primarily on testing done in the laboratory at UC Davis. The useable energy density of commercially available carbon/carbon devices is between 3.5 and 4.5 Wh/kg. The corresponding power density for high efficiency (9…
Preparation and properties of isobutylene–isoprene rubber–clay nanocomposites
Abstract Isobutylene isoprene rubber (IIR)‐clay nanocomposites have been prepared successfully by melt intercalation with maleic anhydride‐grafted IIR (Ma‐ g ‐IIR) and organophilic clay. In IIR‐clay nanocomposites, the silicate layers of the clay were exfoliated and dispersed into the monolayer. The nanocomposites exh…
Radial-breathing mode frequencies for single-walled carbon nanotubes of arbitrary chirality: First-principles calculations
First-principles calculations are performed for the radial-breathing mode of all 105 single-walled carbon nanotubes within the rolling-geometry diameter range of $0.4\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}1.4\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$. The diameter dependence of the frequencies is…
Simultaneous softening ofCu3Nphonon modes along theT2line under pressure: A first-principles calculation
${\mathrm{Cu}}_{3}\mathrm{N}$ band structures and phonon dispersion curves under pressure are calculated using first-principles density functional theory and density functional perturbation theory with the local density approximation by the plane-wave pseudopotential method. The band structures are similar to other fu…
A Combined Ultracapacitor – Lead Acid Battery Energy Storage System for Mild Hybrid Electric Vehicles
Improvements in ultracapacitor technology indicate that the automotive industry should re-examine the energy storage system for hybrid electric vehicles (HEVs). With the combination of an ultracapacitor and a lead acid battery, a system can be implemented in which the lead acid battery can be maintained at 100% state…
An Investigation of the Reactivity of [(diimine)(dithiolato)M] Complexes Using the Fukui Functions Concept
Abstract Fukui functions are widely used when investigating the reactivity of organic molecules, but rarely with metal complexes. Here, we investigate the reactivity of [(diimine)(dithiolato)M] complexes with different types of reagents and upon oxidation employing this concept. Mixed‐ligand complexes of this type hav…