Materials Literature
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In 6 Se 7 thin films of different thicknesses were prepared by the thermal deposition technique. Structural studies show that In 6 Se 7 thin films have a polycrystalline nature of the monoclinic phase: its lattice parameters a , b , c and β were calculated for the first time. The thermoelectric power (TEP) measurement…
The optical and electrical properties of the as-prepared and annealed SnxSb20Se (where x = 8, 10, 12, 13.5, 15, 16.5 and 18 at.%) thin films were studied. X-ray diffraction showed that all the as-prepared Sn-Sb-Se films were amorphous. Annealing the films at 473 K or above crystallized the films and the degree of crys…
The wet air oxidation of benzene has been studied in a 1.24 L stainless steel autoclave at a temperature in the range of 190−260 °C. The oxygen partial pressure was varied from 0.69 to 1.72 MPa. The initial C 6 H 6 concentration was 5.63 mmol/L. The influence of the pH was studied, and the main reaction intermediates…
We show that the deposition of poly(isoprene- b -ethylene oxide) block copolymer (PI−PEO) micelles on freshly cleaved mica produced ultraflat, polymer nanoislands of well-defined monomolecular thickness. The islands were partly adsorbed and partly floating on the substrate, and their morphology changed over time (unde…
A series of four (CaO)x(Al2O3)(1−x) glasses over the narrow compositional range x = 57.1–66.7 have been studied using high energy x-ray and neutron diffraction. The coordination number of oxygen around aluminum was determined as 4 at all compositions. The coordination number of oxygen around calcium was extracted usin…
High energy x-ray diffraction measurements have been performed on CaO–Al 2 O 3 liquids suspended in a flow of pure argon for six compositions containing 50–67 mol% CaO. The results indicate that AlO 4 tetrahedra dominate the liquid structure. The radial distribution functions show a significant broadening of the Ca–O…
ZnO spheres and pseudospherical structures have been synthesized by a surfactant-free wet chemical method. The products were formed by a dissolution/reprecipitation mechanism. Room temperature ferromagnetism has been observed in the products, which could be affected not only by annealing but also by ultrasonic treatme…
Relaxation in glass-forming substances is necessarily a many-body problem because of intermolecular interactions and constraints. Results from molecular dynamics simulations and experiments are used to reveal the critical elements and general effects originating from many-body relaxation, but not dealt with in convent…
The island growths during the epitaxy of differently polar ZnO thin films under O-rich condition are simulated in terms of a phase-field model. The different island nucleation modes as well as the different atom migration and influx sticking ability are considered on the Zn-polar surfaces and the O-polar ones. By repr…
The stochastic nonlinear Langevin equation theory of the single-particle dynamics of glassy hard sphere fluids and suspensions has been applied to address several issues raised by recent experimental and simulation studies. The theoretically predicted degree of non-Fickian behaviour at intermediate times, and the slow…
This article presents a synthesis method for nanoparticle-cored dendrimers (NCDs), which have dendritic architectures around a monolayer-protected gold nanoparticle. The synthesis method is based on a strategy in which the synthesis of monolayer-protected nanoparticles is followed by adding dendrons on functionalized…
Abstract A novel dual‐zone fluidized bed reactor was proposed for the continuous adsorption and reduction of NO x from combustion flue gases. The adsorption and reaction behaviour of such a reactor has been simulated in a fixed bed reactor using Fe/ZSM‐5 catalyst and propylene reductant with model flue gases. Fe/ZSM‐5…
Abstract Catalytic decomposition of ozone was carried out in a 15‐m high, 90‐mm inner diameter downer reactor. Radial distributions of ozone concentration at different axial elevations under different operating conditions were measured. The results were explained from the flow structure experimental data and correspon…
N -[4-Tosyloxybutyloxymethyl]phenyl]- N,N -diphenylamine showed unexpected chemical reactivity and polymerized to form hyperbranched poly( p -methylenetriphenylamine) (PMTPA) under neat conditions. The hyperbranched PMTPA was electrochemically active and could be deposited on electrode surface when oxidized. The SEM s…
Dielectric spectroscopy has often been used to study confinement effects in alkylcyanobiphenyl liquid crystals. In this paper, we highlight some of the effects that have been discovered previously and add new data and interpretation. Aerosil nanoparticles form a hydrogen bonded random porous network. In dispersions of…
Polymer materials often contain a polydispersity of molecular lengths. We studied the linear growth rates of polymer lamellar crystals in the binary mixtures of different chain lengths by means of dynamic Monte Carlo simulations. Both chain lengths were chosen large enough to perform chain folding upon crystal growth…
The effect of mechanochemical processing in air and water on the physicochemical transformations of barium titanyl oxalate has been studied using X-ray diffraction, thermal analysis, FTIR spectroscopy, temperature-programmed argon desorption, and particle size measurements. The results demonstrate that mechanochemical…
AIM: To develop nano test tubes that will deliver a biomedical payload to a specific cell type. METHODS: The template-synthesis method was used to prepare silica nano test tubes. An antibody that is specific for breast cancer cells was attached to the outer tube surfaces. A fluorophore was attached to the inner surfac…
Biological systems are the paragon of dynamic self-assembly, using a combination of spatially localized protein complexation, ion concentration, and protein modification to coordinate a diverse set of self-assembling components. Biomimetic materials based upon biologically inspired design principles or biological comp…
We study the influence of nanoparticles (NPs) on liquid crystal (LC) ordering. As regards the structural ordering we consider NPs as a source of a quenched random field. Roughly such a situation is encountered in mixtures of LCs and aerosil NPs (aerosil NPs are spherular ones). Using the semi-microscopic lattice model…