Materials Literature
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This work reports the efforts to obtain TiFe intermetallic compound by high-energy ball milling of Ti and Fe powder mixtures. This process route has been used to provide a better hydrogen intake in this compound. Milling was carried out in a SPEX mill at different times. Strong adherence of material at the vial walls…
A detailed description, based on the literature, of the dependence of the foaming process on the type of applied polymeric materials with special reference to polyolefins (PE and PP) was initially presented in the introductory section of this paper. The scope of the work involved comparative studies on the foaming pro…
Abstract Anode‐supported SOFC was fabricated using gadolinia doped ceria (GDC) as the electrolyte (15 μm of thickness), Ni‐GDC as the anode and La 0.5 Sr 0.5 CoO 3 – δ ‐GDC as the cathode. Catalytic activities of the electrodes and electrical properties of the cell were determined, using mixtures of methane + air, und…
Abstract Summary : Three zinc guanidine‐pyridine hybrid complexes [Zn(TMGqu) 2 (CH 3 SO 3 )][CH 3 SO 3 ] ( 1 ), [Zn(DMEGqu)(CH 3 SO 3 ) 2 ] ( 2 ) and [Zn(DMEGqu) 2 (CH 3 SO 3 )][CH 3 SO 3 ] ( 3 ) were synthesised, completely characterised and investigated on their activity in the solvent‐free ring‐opening polymerisati…
A facile strategy to graft polymers onto the surfaces of multiwalled carbon nanotubes (MWCNTs) was developed via the free radical addition process in the solution radical polymerisation of styrene in presence of the MWCNTs without any pretreatment so that the length of the original MWCNTs remained unchanged. The polys…
The dielectric property of relaxor ferroelectric 0.93Pb(Zn₁/₃Nb₂/₃)O₃-0.07PbTiO₃ single crystals (PZN-0.07PT) is studied to investigate the ferroelectric phase transition. The temperature dependence of the susceptibility of the central peak in the light scattering shows a very similar behavior to the real part of the…
Harmful bacteria are the most common cause of food- and waterborne illnesses. Infection often leads to bloody diarrhoea, and occasionally to kidney failure. Several strains of the bacteria Escherichia coli produce a powerful toxin which causes serious illness. Food and water can be contaminated with other bacteria lik…
Anhydrous proton conductors in which proton transport proceeds via structure diffusion are interesting alternatives for membrane materials in hydrogen/air fuel cells. Understanding the mechanism of proton diffusion in candidate materials is necessary to improve their performance. We present the results of our studies…
A model of formation of ultradisperse particles in the plasma torch emerging during evaporation of a metal target by a high-power electron beam is described. A model of heterogeneous media is proposed for describing the plasma torch dynamics taking into account heat conduction, heat transfer and friction between compo…
The carrier statistics in carbon nanotubes (CNTs) with nonparabolic energy spectrum is studied in order to predict the ultimate (intrinsic) drift velocity as a function of temperature, concentration, and chirality. The extremely high mobilities in CNTs do not necessarily lead to higher saturation velocity that is limi…
We have measured the temperature dependence (30 K≤T≤300 K) of the electrical resistance of ZnO single crystals prepared by hydrothermal method in darkness and under the influence of light in the ultraviolet range. The resistance decreases several orders of magnitude at temperatures T<200 K after illumination. E…
The adsorption of carbon monoxide (CO) on zinc oxide is important to a number of industrial processes. We report here density-functional calculations of CO binding geometries, adsorption energies, and vibrational frequencies on the polar Zn-terminated ZnO(0001) surface. Our results illuminate a surprising complexity i…
Abstract The application of a rapid, non‐destructive, cost‐effective technique such as ultrasonic emulsification for the coating of different textiles was explored. The technical benefits for this research were the generation of multifunctional materials and their combinations through environmentally friendly processi…
We have directly studied the elemental depth profiles of Au/Ti and Au/Pt/Ti multiple-layers, which are candidates as ohmic materials for a p-type diamond substrate, grown on diamond (001) surfaces at room temperature (RT) and 550 °C using Rutherford backscattering method. Significant interlayer diffusion between Au an…
Corrosive sulfur in transformer oil has been identified to cause sudden and unexpected failures of several transformers in recent years. It has been decades since corrosive sulfur has caused such problems. This paper discusses the problems caused by corrosive sulfur, why the problem has resurfaced, new test methods de…
We describe our recent experimental results on the fabrication of quantum-dot devices in a graphene-based two-dimensional system. Graphene samples were prepared by micromechanical cleavage of graphite crystals on a SiO2/Si substrate. We performed micro-Raman spectroscopy measurements to determine the number of layers…
The processes of accumulation and annealing of radiation defects at low-temperature (77 K) electron and neutron irradiation and their effect on the physicomechanical properties of Fe-Cr alloys and oxide dispersion strengthened (ODS) steel have been studied. It has been shown that the behavior of radiation defects in O…
It is shown that the surface-enhanced Raman scattering (SERS) technique can be applied to detect organic molecules during in situ experiments. To this purpose, we used trans-1,2-bis(4-pyridyl)ethylene (BPE) as a target molecule. Adsorbed on the SERS chemosensor surface and excited under laser, the vibration modes of t…
The easily accessible 2,17-bis-chlorosulfonated 5,10,15-trispentafluorophenylcorrole is demonstrated as a highly versatile synthon for the preparation of corroles with functional groups that may be used for advanced applications and materials. Examples presented here are useful for donor-acceptor dyads, water-solubili…
Abstract Nascent form of random copolymers of propylene with ethylene, 1‐butene, 1‐hexene, 1‐octene, and 4‐methyl‐1‐pentene was studied by Raman spectroscopy. The most significant spectral alterations with a change in propylene content were observed in two lines at 809 and 841 cm −1 . The first line corresponds to vib…