Materials Literature
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Seedless superfilling by copper electrodeposition is demonstrated on sub-micrometer trenches with Ir barrier layers deposited by atomic layer deposition. The Cu deposition is seen to occur smoothly and continuously on the Ir without the benefit of a copper seed layer. The work supports efforts to develop diffusion bar…
Three types of novel carbon materials, such as KOH-activated microporous carbons, highly ordered carbons obtained by a template technique, and a special carbon/carbon composite based on carbon nanotubes with carbonized polyacrylonitrile have been used as electrodes for supercapacitors in aqueous and organic electrolyt…
Finite element simulations of single pit propagation have previously been combined with stochastic models of pit nucleation. In this paper, we use this model to focus on the possible interactions between pits by first considering the effect of a propagating pit (the primary pit) on the probability of pit initiation at…
Europium-activated ZnS nanocrystals were synthesized by a low temperature tartaric acid assisted sol-gel method. The emission peak of Eu2+ due to the 4f65d1 →4f 7 transitions at 480nm was observed in the emission spectra on excitation at 260nm. Scanning electron microscopy (SEM) investigations were carried out to unde…
The performance of two fog-type porcelain insulators is investigated in the case of condensation wetting and uniform as well as non-uniform contaminant distribution. Both insulators have been employed simultaneously on the same transmission line poles and exceed the minimum required creepage distance. However, their f…
Thin films of Nd2O3 have been studied. For the amorphous phase the dielectric constant is ~ 11 whilst the refractive index is 1.76 {plus minus} 0.02, in the cubic form these values are ~ 13.6 - 15.4 and 1.93 {plus minus} 0.02. Hexagonal films have dielectric constants in the range 17 - 21 and estimates based upon the…
In the present study, chitosan was used as the basis for corrosion resistant coating. Chitosan suffers from two inherent weaknesses as a coating material namely high hydrophilicity and poor adhesive strength with Al 2024 T3 alloy. In the present study, chitosan structure was modified using epoxy functional silane and…
'Chemical Reactivity of Binary Rare Earth Oxides' published in 'Binary Rare Earth Oxides'
Prismatic boron nitride nanorods have been grown on single crystal silicon substrates by mechanical ball-milling followed by annealing at $1300\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$. Growth takes place by rapid surface diffusion of $\mathrm{BN}$ molecules, and follows heterogeneous n…
We use grand-canonical-ensemble self-consistent field theory to study blends of both moderately and strongly segregated homopolymers A and B with some diblock copolymer AC, where C is attracted to B. We derive an analytical condition for the Flory−Huggins interaction parameters, which describes a balanced copolymer su…
An efficient and practical synthesis of bridged diarylacetylenes in multigram quantities has been successfully carried out using high-yielding (classical) synthetic methods and readily available starting materials. The structural analysis of the representative bridged diarylacetylenes by X-ray crystallography strongly…
PhotoDSC has been applied to follow the global kinetics of chain scissions resulting from the UV light irradiation or from the thermal degradation of a high molecular weight PEO (4 x 10(6) g x mol(-1)). Infrared spectroscopy, XRD measurements and rheology experiments were performed to evidence the occurrence of chain…
The rotational power losses measured in the clockwise and anticlockwise directions differ noticeably. There are many factors that contribute to this difference, but these have not previously been explained in the literature. A discussion on the physical phenomena that contribute to the power loss along with the experi…
Internal friction and dynamic shear modulus in an indium–21 at.% thallium alloy were measured as functions of frequency and cooling rate using broadband viscoelastic spectroscopy during the martensitic transformation which occurs in this material occurs around 50°C. Microstructural evolution of martensitic bands was c…
Oxo-acetato-bridged triruthenium cluster complexes ([Ru3(mu3-O)(mu-CH3CO2)6(L1)(L2)2](+/0)) show various color changes with variations of the total charge of the cluster complexes and terminal ligands. After photosensitized electron transfer via the triplet excited state of zinc tetraphenylporphyrin, the change of the…
The nature of low- and high-temperature anomalies in electrical properties of LaSr(Ca)MnO films with clusterized structure is investigated. Results concern the cluster sizes $D=100--150\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}$, in which charge quantization is of importance but quantum confinement does not yet have an…
We show using density functional calculations that the small e'g Fermi surfaces in NaxCoO2 are destroyed by Na disorder. This provides a means to resolve the prediction of these sections in band structure calculations with their nonobservation in angle resolved photoemission experiments.
In the present work we report on the most recent development at ENEA on the synthesis and the characterization of Ionic Liquids for use as electrolytes or electrolyte components in lithium metal batteries and hybrid supercapacitors.
The electrochemical impedance diagrams obtained at the corrosion potential for pure Mg or for AZ91 alloy presented the same shape after an immersion time of few days. It was thus assumed that the magnesium matrix of the AZ91 alloy corrodes first. The diagrams are characterized by two capacitive loops and an inductive…
In recent years, there has been an increasing demand for micro-vibration free space from industrial and scientific organizations. In response to this demand, several active micro-vibration control systems utilizing various types of actuators have been developed and applied in various environments and to a number of ma…