Materials Literature
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Abstract A “Chemical one step method” (COSM) is proposed to prepare electromagnetic functional composite nanofibers of polyaniline (PANI/ γ ‐Fe 2 O 3 ) having a diameter of ≈20 nm. In this approach FeCl 3 is acts as the oxidant either for polymerization of aniline or for preparation of γ ‐Fe 2 O 3 magnets. Besides, it…
It is believed that the dynamics of dislocation processes during the deformation of nanocrystalline materials can only be visualized by computational simulations. Here we demonstrate that observations of dislocation processes during the deformation of nanocrystalline Ni with grain sizes as small as 10 nm can be achiev…
Mesoporous nanocrystalline zirconia with a high surface area and pure tetragonal crystallite phase has been prepared by the surfactant-assisted route, using a Pluronic P123 block copolymer surfactant. The synthesized zirconia showed a surface area of 174 m 2 g - 1 after calcination at 700 °C for 4 h. X-ray diffraction…
It is important for many industrial processes to design new materials with improved selective permeability properties. Besides diffusion, the molecule's solubility contributes largely to the overall permeation process. This study presents a method to calculate solubility coefficients of gases such as O2, H2O (vapor),…
In this work we have developed a comprehensive dynamic model of electron beam induced deposition (EBID) of residual hydrocarbon coupling mass transport, electron transport and scattering, and species decomposition to predict the deposition of carbon nanopillars. The simulations predict the local species and electron d…
Novel conjugated azomethines consisting uniquely of thiophene units are presented. The highly conjugated compounds were synthesized by simple condensation of a stable diamino thiophene (2) with its complementary thiophene aldehydes. These interesting nitrogen-containing thiophene units exhibit variable reactivity lead…
The unsaturated polyester resin based sisal/glass hybrid composites were developed using the hand lay-up technique. Chemical resistance tests of these hybrid composites were performed in order to probe whether these composites can be used for making articles that are resistant to chemicals. The hybrid samples and the…
This paper presents a thorough investigation of the continuous extrusion foaming of amorphous poly(lactic acid) (PLA) using carbon dioxide (CO 2 ) as the blowing agent. Detailed results describing the plasticization induced by CO 2 dissolution as measured from two different methods, on-line rheometry and in-line ultra…
Abstract Ti and Mn‐doped MgAl 2 O 4 spinel have been successfully grown by the micro‐pulling‐down method and spectroscopic properties have been investigated in view of the potential use as a short‐wavelength tunable solid‐state laser. Strong blue emission is observed from Ti‐doped MgAl 2 O 4 and green emission from a…
The recent discovery of high-temperature piezoelectric ceramics based on Bi(Me′Me″)O3-PbTiO3 solutions have also permitted the development of high-temperature relaxor ferroelectrics with ternary solid solutions. One of the high-temperature compositions based on the xBiScO3-yPb(Mg1∕3Nb2∕3)O3-zPbTiO3 (xBS-yPMT-zPT) tern…
The objective of the present study was to investigate the spark plasma sintering technology when a pure coarse aluminium powder is used. In order to understand the process, different conditions of temperature, current flow through the sample, pressure and delay at which the pressure is applied were investigated to cla…
Nanotechnology can be defined as the science and engineering involved in the design, synthesis and application of materials and devices on the nanometer scale. It is not in itself a single emerging discipline, but rather a meeting of several traditional sciences such as chemistry, physics, materials science, biology a…
A novel chemical method has been developed for the preparation of crystalline nanotubes of silver selenide (Ag 2 Se). The method is based on the template-engaged synthesis in which the trigonal Se nanotubes as-prepared were used as template reagent. The products were characterized by scanning electron microscopy (SEM)…
A new convergent synthetic method for the synthesis of PAMAM dendrimers has been developed. The fusion between propargyl-functionalized PAMAM dendrons and azido-functionalized PAMAM dendrons via the Cu(I)-catalyzed Huisgen [2 + 3] dipolar cycloaddition reaction (click chemistry) of an alkyne and an azide leads to the…
Beryllium coatings on metals for marker tiles at JET: development of process and characterization of layers, Lungu, C P, Mustata, I, Zaroschi, V, Lungu, A M, Anghel, A, Chiru, P, Rubel, M, Coad, P, Matthews, G F
The retention of superparamagnetic nanoparticles under the influence of a high-gradient magnetic field was investigated. A simulation algorithm for prediction of the particle's trajectories and, therefore, the total amount of adhered particles in an artificial vessel was developed. Comparisons between in vitro experim…
The electrodeposition mechanisms of poly(3,4-ethylenedithiathiophene) (PEDTT), which is the sulfur analogue of the well-known poly(3,4-ethylenedioxythiophene) (PEDOT), is investigated in acetonitrile solution by means of potentiostatic methods. By analyzing the current transients within electrocrystallization theory,…
Abstract One‐dimensional methyl orange fibrils can be easily prepared. They are stable in acidic aqueous solutions and soluble in neutral water. When used to synthesize conducting polymer microtubules, the fibrils act as “hard templates” formally but as “soft templates” effectively. Microtubular structures of polypyrr…
The strain rate dependence of the brittle-to-ductile transition (BDT) temperature gives the activation energy controlling the BDT. Until recently, data were only available for a limited number of materials. Experimental data on the BDT of tungsten and other bcc metals have recently become available. We have compared a…
Abstract The ZnO nanostructures consisting of micro spheres in a network of nano wires were synthesized by direct vapor phase method. X-ray Photoelectron Spectroscopy measurements were carried out to understand the chemical nature of the sample. ZnO nanostructures exhibited band edge luminescence at 383 nm. The nanost…