Materials Literature
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Thermal degradation behavior of multi-wall carbon nanotubes (MWCNTs)/ultra high molecular weight polyethylene (UHMWPE) nanocomposites, with different nanotubes contents (0.5, 1.5 and 3.5 wt%) prepared via in-situ polymerization technique have been investigated using thermal gravimetric analysis (TGA). TGA spectra reve…
The effects of acoustic-wave propagation both outside and inside a radially collapsing and rebounding bubble are examined. This is done by comparing computational results produced by various reduced-model equations with benchmark results produced by numerical solution of the Euler equations under adiabatic conditions.…
Operating magnetic resonance by an electric field is a highly nontrivial concept, but is the most demanding function in the future of spin-electronics. Recent observations in a variety of multiferroic materials, named ‘collective electrically active magnetic excitations’ and frequently referred to as “electromagnons,”…
Bridged bis(trialkoxysilylalkyl)pyromellitic diimides 3–6 were prepared as single-source precursors for sol–gel derived organic–inorganic hybrid materials. The synthesis route starts with the formation pyromellit diimide 1 from pyromellitic dianhydride and hexamethyldisilazane (HMDS), followed by metallation of the NH…
Over the years, electrical machinery design strategies have been mainly oriented towards enhancing the output power, power density and torque. However, the effect of machine parameters (geometry, material properties, etc.) on stress and life expectancy has not been considered very often. Since the machines are designe…
In the current work, the bulk ternary (0.85- x ) BiFeO 3 - x BaTiO 3 -0.15PbTiO 3 (BF-BT x -PT, x =0.08–0.35) system has been studied as a potential high-temperature piezoceramics. Samples with various content of BT were prepared via solid-state route, and pure perovskite phase was confirmed by X-ray diffraction. The…
Using a density-functional-theory-based computational approach we have examined the nature of electronic surface compensation of polarization in PbTiO3 films with bottom electrodes. For film thicknesses up to 12 unit cells, or approximately 5 nm, we find that films are unpolarized, with no significant electronic charg…
TiO 2 /MCM-41 composites with various titania content were prepared by loading titania into the mesopores of MCM-41 molecular sieves by sol-gel method, and were used as photocatalysts to degrade Rhodamine B (RhB) and phenol. The efficiency of organic contaminants removal was increased significantly compared with pure…
Magnetoelectric (ME) effect at Co2MnSi/BaTiO3 (001) interfaces is demonstrated by using the first-principle calculations. Within paraelectric state, the calculated phase diagram reveals that the modified MnMn/TiO2 (MM/TO) interface could be stabilized under Mn-rich and Co-rich condition. Compared with previous Fe/BaTi…
In this work polyurethane (PU) elastomers based on poly(propylene glycol), diisocyanate and 2,2-Bis (hydroxymethyl)propionic acid were synthesized. CaCO 3 nanoparticles were modified through esterification to increase their interactions with the PU matrix. A series of nanocomposites from polyurethane incorporated with…
Abstract BaLa4Ti4O15 photocatalyst, one of the most active UV light responsive photocatalyst for water splitting, was modified with MgAl–LDH (layered double hydroxide) of an anion adsorbent to improve photocatalytic activity for reduction of nitrate to nitrogen. The activity of the Ni/BaLa4Ti4O15 photocatalyst was sig…
Forty percent of transmission and distribution power grids are composed of underground cables in Shanghai, a city with abundance surface water. The cables are subjected to a variety of stress factors due to the complicated underground environment and the ageing process is accelerated consequently. Lots of cables have…
We present faster display devices based on copper oxide decorated multi-walled carbon nanotubes (MWCNTs) doped ferroelectric liquid crystal (FLC) material. The fastening of the response has been attributed to decrease in rotational viscosity of the FLC material. The ionic impurities were also reduced by doping copper…
As CMOS based memory devices near their end, memory technologies, such as Phase Change Random Access Memory (PRAM), have emerged as viable alternatives. This work develops a hierarchical modeling framework that connects the unique device physics of PRAM with its circuit and state transition properties. Such an approac…
The present paper compares the application of one deterministic and three non-deterministic optimization algorithms to global transformer design optimization. One deterministic optimization algorithm (Mixed Integer Nonlinear Programming), is compared to three non-deterministic approaches (Harmony Search, Differential…
Two types of β‐ functionalized (mono nitrated and perbrominated) meso tetrakis(5‐halothien‐;2‐yl)porphyrins, which can be used as precursors for the synthesis of other asymmetric and highly substituted porphyrins, have been synthesised and characterized. Introduction of a nitro group at the β‐ position shifted soret b…
This paper reports the results on the fabrication and characterization of n-ZnO nanowire/p-Si heterojunction devices. ZnO nanowires were grown on p-Si substrates by two step chemical solution process at low temperature. The ZnO nanowires grown vertically on silicon substrates were characterized by FESEM, EDX and PL. H…
A new method has been proposed for encapsulation of palladium nanoparticles with a size of up to 2.5 nm in the matrix of special supports, the polymer networks based on poly(propylene imine) dendrimers, synthesized for this purpose. It has been shown that the particle size distribution of the materials obtained and th…
The effect of cultivation conditions (the composition, acidity, and salinity of the cultivation medium; temperature; and the hydrodynamic conditions of cultivation) on the adhesion of actinobacteria of the genus Rhodococcus to n-hexadecane has been investigated. A study performed showed that the adhesive activity of r…
A new freshwater diatom species belonging to the genus Achnanthidium KĂźtz. has been found in several French rivers namely those of the Languedoc-Roussillon and Rhin-Meuse regions. Achnanthidium delmontii sp. nov. is described based on light and scanning electron microscopy observations. This species belongs to the gr…