Materials Literature
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We have monitored the optical luminescence from ZnS nanowires as a function of x-ray energy at the Zn L edge (1022 eV). The x-ray absorption spectrum obtained using the 338 nm, band edge emission as a signal resembles that of the wurtzite form of ZnS, while that obtained using the 430 and 520 nm defect emissions, rese…
The formation of inclusion complexes of hydroxypropyl-beta-cyclodextrin, heptakis(2,6-di-O-methyl)-beta-cyclodextrin and heptakis(2,3,6-tri-O-methyl)-beta-cyclodextrin with 5,10,15,20-tetrakis(4-pyridyl)porphyrin (TpyP) has been studied in aqueous buffer solution (phosphate buffer pH = 7 and I = 0.01 M) to give a stru…
The Raman spectra for single-walled carbon nanotubes (SWNTs) at different temperatures are studied. We find that the G peak position shifts to low frequency with increasing temperature. The variation rate of the peak frequency as a function of temperature is a factor of 2–3 larger than the corresponding values for mul…
The first series of triangular cluster complexes of [MCo(2)] (M = Rh, Ir, Ru) with a planar metalladithiolene ring coordinating in the eta(3)-bonding mode were synthesized, and the crystal structures, spectral and electrochemical properties, and thermochromism of these complexes were revealed.
Anisotropic Pr-Fe-B thin films with perpendicular texture have been prepared by magnetron sputtering and subsequent heat treatment. After crystallization at $873\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, the films deposited at $773\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ show a perpendicular anisotropic texture, due to the…
Light-fastness of anionic oxonol dyes as measured in noncrystalline solid films was markedly improved by introducing 4,4′-bipyridiniums as counter cations.
Abstract For Abstract see ChemInform Abstract in Full Text.
Abstract For Abstract see ChemInform Abstract in Full Text.
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…
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…
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…
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…
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…
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…
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…
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,…
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…
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…
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…
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…