Materials Literature
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At temperatures between $7.5\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$ and $20\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$ as well as $26\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$ and $40\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$ we have recorded the densities and specific heat at…
The structure of the title compound, [Ni(C(6)H(16)N(2))(2)]Br(2) or [Ni(Et(2)en)(2)]Br(2) (Et(2)en is asymmetric N,N-diethyl-ethylene-diamine), containing an Ni(II) atom (site symmetry ) in square-planar NiN(4) coordination, is described and contrasted with related structures containing Ni(II) in octa-hedral coordinat…
International audience
Within the framework of a French national monitoring program to survey the man-made radioactivity in the environment, several power plants and research facilities on the territory use environmental air monitors for unwanted releases of radioactive aerosols. High sensitivity and lack of false alarms are all important f…
Abstract A new technique of UV irradiation has been used for the first time to create microstructures of CdS nanoparticles in bulk xerogels. Porous silica matrices, which were first soaked in a solution containing CdS precursors, were subjected to irradiation using a nanopulsed ArF laser with a wavelength of 193 nm an…
Abstract A system for plating bath process monitoring and diagnosis was developed utilizing a novel approach that combines voltammetric methods with various statistical determinant analysis methods coupled with multiway data decomposition. The voltammetric methods employed were designed to provide a current response p…
We report on the study of cleaved-edge-overgrown line junctions with a serendipitously created narrow opening in an otherwise thin, precise line barrier. Two sets of zero-bias anomalies are observed with an enhanced conductance for filling factors ν>1 and a strongly suppressed conductance for ν<1. A transition between…
Nafion−montmorillonite nanocomposite membranes are reported to be effective for reducing fuel crossover when used as the electrolyte in fuel cells. The synthesis of a membrane involves several adjustable parameters. Using the statistical design-of-experiment method, four of the most critical parameters were studied: c…
An analysis of the crystal structures of natural and synthetic phases with ideal chemical formula A 3 REE [Si 6 O 15 ]· n H 2 O ( A = usually alkalis, n ~ 2) shows that they are either 2 O 2 polytypes or polymorphs of sazhinite, which represents the 1 O 1 polytype. The polytypic and polymorphic relations are essential…
Abstract This study examined the role of boric acid and the effect of heat treatment on PVA‐iodine polarizing films prepared in the solution state before casting (IBC) of PVA/iodine/boric acid films. The films were prepared by casting aqueous solutions of 10 wt % poly(vinyl alcohol) (PVA) containing boric acid with 0,…
This study investigated certain aspects of physical and mechanical properties and resistance against biological deterioration of particleboard panels treated with extractives from different parts of Cerbera odollam trees. Particles of rubber-wood ( Hevea brasiliensis) treated with extracts of leaf, fruit, wood, bark,…
We study analytically and numerically a one-dimensional model of interacting line defects (steps) fluctuating on a vicinal crystal. Our goal is to formulate and validate analytical techniques for approximately solving systems of coupled nonlinear stochastic differential equations (SDEs) governing fluctuations in surfa…
Here we present a new approach to overcome the optical diffraction limit by using novel materials. In the paper, we report experimental results obtained by high-resolution transmission electron microscopy (HRTEM) and optical absorption spectroscopy, for a fluorescent photosensitive glass-ceramic containing rare-earth…
Johannes Kepler and Thomas Harriot are recognized as the authors of the close-packing conjecture, the intuitive notion that there is no denser ensemble of congruent spheres than face-centered cubic packing. They are bound not only by the close-packing conjecture, arguably the first principle of the science of crystal…
Abstract Macroporous styrene‐divinylbenzene copolymers with different degree of crosslinking were prepared by suspension polymerization in presence of different binary mixtures of toluene and heptane, as diluent. Specific surface area, bulk and apparent densities, and pore volume of the resulting beads were determined…
The damping capacities of 1%, 5%, and 9% (by mass) graphite particle—reinforced AZ31 magnesium matrix (Grp/AZ31) composites and unreinforced AZ31 magnesium alloy in as-annealed and 5% Grp/AZ31 composites in the different treatment states, which included as-cast, as-quenched, as-annealed, and as-extruded ones, were inv…
The United States Department of Energy (US DOE) concept for facility in-situ decommissioning (ISD) is to physically stabilize and isolate in tact, structurally sound facilities that are no longer needed for their original purpose of, i.e., producing (reactor facilities), processing (isotope separation facilities) or s…
We report on pulsed laser annealing as an efficient method for improving the structural and optical properties of ZnO nanorods grown at low temperature. We find that the excitonic luminescence at 390 nm can be improved by as much as a factor of 8. We also show that laser annealing can be carried out in typical device…
To promote the research on the growth of high-quality InN films attractive to the application for both optical and electronic devices, the pressurized-reactor metalorganic-vapor-phase epitaxy (PR-MOVPE) system which can overcome the high equilibrium-vapor-pressure of nitrogen between solid and vapor phases is original…
This paper presents the fabrication of high reflective sub-wavelength gratings in GaAs on wet oxidized Al x O y low index layers. This structure can efficiently replace a top Bragg reflector in GaAs-based vertical cavity lasers (VCSELs), while keeping all the advantages of a monolithic stack. Low refractive index and…