Materials Literature
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We present an ab initio investigation of the band gap of the ${\text{Pb}}_{1\ensuremath{-}x}{\text{Eu}}_{x}\text{Se}$ $(0\ensuremath{\le}x\ensuremath{\le}1)$ alloy using the special quasirandom structure approach proposed by Wei et al. [Phys. Rev. B 42, 9622 (1990)]. Due to the complexity of this particular system, i.…
The conventional approach for the formation of highly self-organized nanotube layers is based on anodization of titanium in fluoride containing electrolytes. In the present work we demonstrate that also chloride ions in a suitable organic electrolyte can be used to grow organized nanotube layers. The results show, tha…
Abstract In this article, the influences of operating variables on the particle size (PS) and particle size distribution (PSD) of emulsion poly(vinyl chloride) in batch reactor were investigated using Taguchi experimental design approach. The variables were temperature (T), water to monomer weight ratio (R), concentra…
Abstract In this article, we have examined the physical and mechanical properties of poly(vinyl chloride) (PVC)/α‐methyl‐styrene‐acrylonitrile (αMSAN; 31 wt % AN concentrations) blends with different blend ratios. And, we also examined the effect of the molecular weights of PVC on the miscibility and material properti…
Abstract One of the major themes in tissue engineering is scaffold fabrication. The porosity and pore size of scaffolds play a critical role in tissue engineering. Different methods are used to measure the porosity and pore size of scaffolds, although none can predict the cell infiltration for various cell sizes, shap…
Thermodynamic and kinetic approaches for sublimation inside elastoplastic material under tensile stress are developed for large strains. Various conceptual problems related to irreversible plastic deformation are addressed for a spherical bubble. They include definitions of the thermodynamic driving forces and activat…
Multiple in situ diagnostics have been employed to study the reaction mechanism of plasma-assisted ALD of Al2O3 and the influence of the substrate temperature on the material properties obtained. The results demonstrate that the ALD mechanism is governed by the formation of -CH3 surface groups and CH4 by-products upon…
Our studies have significantly modified the conventionally held view of the phase diagram of ${\text{La}}_{2\ensuremath{-}2x}{\text{Sr}}_{1+2x}{\text{Mn}}_{2}{\text{O}}_{7\ensuremath{-}\ensuremath{\delta}}$ for two compositions exhibiting charge (and orbital) order (CO), i.e., at hole-doping levels, $h=x\ensuremath{-}…
Abstract Bis(3‐triethoxysilylpropyl) tetrasulfide (TESPT) was used to improve the interfacial adhesion between cotton fiber and natural rubber (NR). The crosslink density, interfacial adhesion, mechanical properties, dynamic mechanical properties, and morphology of NR/cotton fiber composites were investigated. The com…
Abstract An investigation on the effect of filler geometry/shape on the dynamic mechanical properties of polymers was conducted. The viscoelastic damping matrix chosen was SBR and the fillers chosen were graphite, aramid, and carbon short fibers. The study was conducted by taking a control base compound of 20 parts N3…
Abstract Anhydrides production is newly proposed as an additional pyrolysis mechanism of a biopolymer, poly(3‐hydroxybutyrate) (PHB). In spite of many suggestions of multiple degradation mechanisms, simple random chain scission by β‐elimination has been accepted as an exclusive mechanism of the thermal degradation of…
Realistic amorphous samples of a-Al2O3 and a-ZrO2 were generated by a hybrid classical and density functional theory (DFT) "melt and quench" molecular dynamics approach. The generated samples demonstrated good correlation with reference experimental and simulated properties.
We report the synthesis of CuI coated and CdS coated Au core-shell nanoparticle films using electrochemical atomic layer deposition (EC-ALD). Au nanoparticle thin films were prepared on glassy carbon supports by depositing alternating layers of poly-(diallyl dimethylammonium)-stabilized Au nanoparticles and CoP2W17061…
Thin film Ge on Si is a potential active material candidate for electrically pumped monolithically integrated Si-based light emitters. Theoretical analysis has shown that a combination of strain and n-type doping can modify the band structure of Ge so that it exhibits direct bandgap properties. Direct band-to- band opt…
The stepwise growth of Pd in a USY zeolite was followed by in situ quick X-ray absorption fine structure (QXAFS) spectroscopy involving repeated alternating exposures to H 2 and O 2 flows at room temperature. During the first reduction of 0.4 wt % Pd/USY with 8% H 2, Pd clusters with a coordination number (CN) of 5.1…
Abstract The effect of different annealing treatments with supercritical carbon dioxide (SCCO 2 ) on the structural and mechanical properties of semicrystalline poly‐ L ‐lactic acid ( L ‐PLA) was investigated. 2000, 27,000, 100,000, and 350,000 g mol −1 molecular weight L ‐PLA polymers were used in the study. The soli…
We study subcritical fracture driven by thermally activated damage accumulation in the framework of fiber bundle models. We show that in the presence of stress inhomogeneities, thermally activated cracking results in an anomalous size effect; i.e., the average lifetime t{f} decreases as a power law of the system size…
OBJECT: The extracellular Mg++ has a vasodilatory effect on the cerebral artery. The present study investigated the effect of intracisternal injection of MgSO4 solution on cerebral vasospasm in a canine model of subarachnoid hemorrhage (SAH). METHODS: Subarachnoid hemorrhage was induced in 10 beagles using the two-hem…
A detailed in situ Raman spectroelectrochemical analysis of the radial breathing mode (RBM) of single-walled carbon nanotubes (SWCNTs) in bundles is presented. The intensity of the RBM feature exhibits striking changes even before the electrode potential reaches the level of the Van Hove singularity, which is involved…
The adsorption of CH 3 OH vapor at the surface of Ca-modified silica was studied by means of the combined use of an experimental and a theoretical approach. Parallel IR spectroscopic and microcalorimetric experiments were performed to describe quantitatively and energetically the surface features of nanosized Ca-modif…