Materials Literature
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Bi 2 Ti 2 O 7 thin films were grown by radio-frequency magnetron sputtering on bare and Pt-coated sapphire substrates at low substrate temperatures (∼200 °C). Postdeposition anneals were carried out at different temperatures to crystallize the films. Nearly phase-pure Bi2Ti2O7 thin films with the cubic pyrochlore stru…
This article presents the results of combined experimental and theoretical studies of elastic and thermal properties of Zr2Al3C4 carbide. The full set of second order elastic constants, bulk modulus, shear modulus, and Young’s modulus of Zr2Al3C4 were calculated and compared with those of Zr3Al3C5 and ZrC. The experim…
Aluminum doped zinc oxide (ZAO) films were prepared by sol gel dip-coating process. Several annealing treatments were carried out to improve the conductivity of ZAO films. The results show that the annealing temperature and the cooling rate have significant effects on the resistivity of ZAO films. A minimum resistivit…
Standard AOAC methods of chemical analysis have been used to characterise the industrial byproducts partly burnt chicken litter ash (CLA), totally burnt chicken litter ash (CLAT), wood ash (WA), and iron smelting slag, for use as a combined liming agent and phosphate (P) fertiliser. These materials are effective limin…
We have investigated the effect of Cr substitution for Fe on the spin polarization, P, of Co2CrxFe1−xSi alloys using the point contact Andreev reflection method. A steep increase from P=0.57 to P=0.64 occurs by a small substitution of Cr for Fe of x=0.02, thereafter P values are constant for higher Cr concentrations u…
First-principles method based on the density-functional theory is used to study the diffusion of the single carbon interstitial in graphite. Possible diffusion processes in directions both parallel and perpendicular to the basal plane are analyzed. A different path for the interstitial to penetrate the graphitic layer…
For intermediate sized chemical systems the use of an auxiliary basis set (ABS) to fit the charge density provides a useful means of accelerating the performance of various quantum chemical methods. As a consequence much effort has been devoted to the design of various ABSs. This paper explores a fundamentally new app…
Indium sulfide hollow spheres consisting of nanoflakes with the thickness of about 20 nm were successfully prepared by dodecanethiol-assisted hydrothermal process at 180 °C for 12 h, employing indium chloride tetrahydrate and l- cysteine as precursors. The diameter of In 2 S 3 hollow spheres is 3−5 μm. More interestin…
The electronic properties of single-wall carbon nanotubes (SWNTs) have been studied using dc magnetization and electron spin resonance (ESR). The dc magnetization displays a weak diamagnetic susceptibility of $\ensuremath{\approx}{10}^{\ensuremath{-}7}\phantom{\rule{0.3em}{0ex}}\mathrm{emu}∕\mathrm{g}$. ESR measuremen…
In general, deformation behavior of magnesium in compression is different from tensile. To investigate deformation behavior of magnesium single crystals, c-axis compression was performed. The crystals were yielded by second order pyramidal slip, and the yield stress shows anomalous temperature dependence (increased wi…
The thermal conductivity of a rare-gas crystal (Ar) is computed using equilibrium molecular dynamics in conjunction with the Green-Kubo linear response formalism, and the Lennard-Jones potential with an appropriately long cutoff (4σ). Besides predicting absolute values of the conductivity from low temperature up to th…
Dispersions of carbon nanotube salts prepared by treating single-walled carbon nanotubes (SWNTs) with lithium in liquid ammonia react with aryl and alkyl sulfides by single electron transfer (SET) to yield transient radical anions that dissociate into carbon-centered free radicals and mercaptide. The free radicals add…
Abstract We report here on a simple preparation procedure for highly transparent zeolite‐polymer hybrid materials and polymer covered zeolite L monolayers. Wrapping up zeolites containing, e.g., dye molecules as guest species with alkoxysilane derivatives results in an efficient dispersion of the nano particles into t…
The fine structure characterization of individual legs is essential for understanding the detailed formation mechanism and the origin of the unique properties of tetrapod-like ZnO nanostructures. We have synthesized tetrapod-like ZnO nanostructures with thin needle (TN-ZnO), uniform hexagonal prism (TU-ZnO), and hiera…
The in vitro motility assay is valuable for fundamental studies of actomyosin function and has recently been combined with nanostructuring techniques for the development of nanotechnological applications. However, the limited understanding of the interaction mechanisms between myosin motor fragments (heavy meromyosin,…
In this study, mesoporous silica SBA-15 was functionalized with primary, secondary, and tertiary amino-functional silanes onto the channel walls using a postsynthesis method as a first attempt to purify succinic acid from a fermentation broth. Ordered mesostructures of pristine and functionalized SBA-15 were evaluated…
Epitaxial antiferroelectric PbZrO3 (PZO) thin films of two different crystallographic orientations were grown by pulsed laser deposition on (100)-oriented SrTiO3 single crystal substrates. The latter were covered either with SrRuO3 epitaxial bottom electrodes, or with an epitaxial BaZrO3 buffer layer and an epitaxial…
Abstract Erbium quinolinolates, commonly assumed to be mononuclear species with octahedral co‐ordination geometry, have been proposed as promising materials for photonic devices but difficulties in obtaining well defined products have so far limited their use. We report here the conditions to obtain in high yields thr…
The Ohta–Kawasaki density functional theory of diblock copolymers gives rise to a nonlocal free boundary problem. In a proper range of the block composition parameter and the nonlocal interaction parameter, an equilibrium pattern of many droplets exists in a general planar domain. A sub-range of the parameters is iden…
The recombination mechanisms of nitrogen-related emissions in p-type ZnO films were investigated by photoluminescence (PL) measurements. The enhanced peak at 3.260 eV was confirmed as a donor-acceptor pair (DAP) transition and the emission around 3.310 eV was assigned to the free electron to acceptor (FA) recombinatio…