Materials Literature
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The molecular dynamics computer simulation technique was used to determine the effect of the orientation of the crystal (cathode) on Li‐ion transport across the electrolyte/cathode interface for solid‐state thin‐film batteries and electrochromic devices. Simulations of the intercalation of lithium ions from a lithium…
Papago Park, Arizona, is a pediment-inselberg complex that hosts a variety of well developed tafoni and alveolar weathering forms. The purpose of this paper is to analyse the nature of chemical weathering associated with the tafoni using backscatter electron microscopy (BSE) and quantitative wavelength dispersive X-ra…
A rigorous electromagnetic algorithm is presented for the analysis of electrically large diffractive optical elements (DOE's), i.e., those that contain small features and have large apertures compared with the wavelength of illumination. The technique uses a finite-sized analysis window within which a rigorous electro…
The partial crystallization properties of Ge 1 Sb 2 Te 4 phase-change optical disks are studied using two methods. The first one involves annealing of the samples in a vacuum oven while controlling annealing time and temperature, while the second one involves the use of a static tester. A difference in reflectivity wa…
The thermoelastic properties of woven glass/epoxy substrates for multilayer circuit board applications were investigated and the influence of fabric geometry assessed. The woven fabric geometry of several commercially pressed boards was carefully characterized using optical microscopy. The elastic moduli and Poisson’s…
Multilayer coatings with three layers were designed to yield an increase in normal-incidence reflectance in the extreme ultraviolet over that of the available single-layer coatings. Multilayer coatings based on Al, MgF(2), and either SiC or B(4)C were demonstrated to have higher reflectance than single layers of SiC a…
We have found new monomers which are able to give stable nematic and isotropic emulsions with micron-sized droplets. A poor contrast ratio in optical transmittance is obtained when thin electro-optical films of nematic emulsions are prepared with only one monomer. Matching between a monomer matrix refractive index and…
The topography of the free energy landscape in phase space of a dense hard-sphere system characterized by a discretized free energy functional of the Ramakrishnan-Yussouff form is investigated numerically using a specially devised Monte Carlo procedure. We locate a considerable number of glassy local minima of the fre…
More than 30 years of research on point defects in natural and high pressure, high temperature (HPHT) synthetic diamond helps us to characterise diamond produced by chemical vapour deposition (CVD). Nitrogen is the most common impurity in natural diamond, but hydrogen and boron are also detected. In HPHT diamond, nick…
Base-catalyzed condensation of diferrocenylsilanediol, Fc 2 Si(OH) 2 ( 3; Fc = (η-C 5 H 4 )Fe(η-C 5 H 5 )), in refluxing 95% ethanol (ca. 90 °C) affords a novel cyclotrisiloxane with six ferrocenyl substituents, [Fc 2 SiO] 3 ( 4 ), in 74% yield. At 60 °C, the intermediate tetraferrocenyldisiloxanediol, [HOSiFc 2 ] 2 O…
Time-resolved fluorescence anisotropy of a bound extrinsic probe was studied in an effort to characterize dynamic properties of the transient partially folded forms that appear during the folding of the alpha-subunit of tryptophan synthase (alphaTS) from Escherichia coli. Previous studies have shown that alphaTS, a si…
Abstract A new method for the preparation of Pd nanoparticles immobilized on alumina at room temperature by ultrasonic irradiation of an aqueous solution of tetrachloropalladate(II) is reported. The size of Pd particles can be controlled by changing the type of alcohol and the amount of coexisting alumina.
Axially fluorinated cyclohexane derivatives are a promising new type of liquid crystals with negative dielectric anisotropy. Up to now, the technical application of these materials in LCDs was impeded by their strong tendency to form smectic B mesophases. We present a convenient synthetic pathway leading to new homolo…
Polymer-like organic thin films were deposited by plasma enhanced chemical vapor deposition (PECVD) using the para-xylene precursor. The effect of the plasma power on the dielectric constant and thermal stability was significant. As the plasma power was increased from 5 W to 60 W, the relative dielectric constant incr…
Abstract Processing of microcellular foam was studied for polyurethane. Assuming that the bubble growth is controlled by diffusion, theoretical prediction was carried out numerically to understand the bubble growth mechanism in the cavity during mold filling. Final bubble sizes were also predicted by considering the g…
Abstract CdS-Au hybrid nanoparticles are synthesized through electrostatically self-assembling of the pre-formed monodisperse CdS and Au nanoparticles via the interaction between ammonium ions and carboxylate ions which were modified on CdS and Au nanoparticle surface, respectively.
Four bis(ether anhydride)s, 4,4′-(1,4-phenylenedioxy)diphthalic anhydride (IV), 4,4′-(2,5-tolylenedioxy)-diphthalic anhydride (Me-IV), 4,4′-(2-chloro-1,4-phenylenedioxy)diphthalic anhydride (Cl-IV), and 4,4′-(2,5-biphenylenedioxy)diphthalic anhydride (Ph-IV), were prepared in three steps starting from the nucleophilic…
In the pulsed-laser deposition process, high intensity laser pulses expel material from a solid target and form expanding plasma near the solid surface. The expansion of the plasma produces a forward-directed beam of ionized and neutral species with typical energies of 1–100 eV. In this study, amorphous diamond-like c…
Langmuir films composed of disc-shaped molecules (rather than traditional amphiphiles) are briefly reviewed. The molecules investigated typically have a flat, conjugated core and flexible side chains, such as the triphenylene derivatives shown in the Figure. Information obtainable from pressure–area isotherms is discu…
Epitaxial (001) oriented SrTiO3 films have been deposited on LaAlO3(001) substrates by off-axis radio frequency magnetron sputtering in Ar:O2 gas mixtures at substrate temperatures ranging from 650 to 850 °C. For the deposition conditions used, stoichiometric targets yielded 20% Sr-deficient films, whereas Sr-enriched…