Materials Literature
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A series of homodinuclear lanthanide(III) complexes with the 4-cba ligand, [La2(4-cba)6(phen)2(H2O)6] (1) and [Ln2(4-cba)6(phen)2(H2O)2] (Ln = Pr (2), Nd (3), Sm (4), Eu (5), Gd (6), and Dy (7); 4-Hcba = 4-cyanobenzoic acid; phen = 1,10-phenanthroline), have been synthesized and structurally characterized by single-cr…
This work reports the evaluation of several theoretical approaches to the zero-field splitting (ZFS) in transition metal complexes. The experimentally well-known complex [Mn(acac)3] is taken as an example. The direct spin-spin contributions to the ZFS have been calculated on the basis of density functional theory (DFT…
The stress corrosion cracking (SCC) of a commercial austenitic stainless steel type 316 was investigated as functions of applied stress, sensitizing temperature and sensitizing time in 0.82 kmol/m3 sulphuric acid solution by using a constant load method. The applied stress dependence of the three parameters (lss, stea…
Drying effects on corrosion performance of Cr(VI)- and Cr(III)- treated electro-galvanized steel have been studied in NaCl solution using potentiodynamic measurements and electrochemical impedance spectroscopy (EIS). The Cr(VI) and the Cr(III) treated specimens were dried at three different temperatures: 60, 110 and 2…
Tungsten oxide (WO3) thin films were produced by pulsed laser depositon and the effect of temperature on their structure studied. Characterization of PLD WO3 thin films as a function of growth temperature using X-ray diffraction (XRD) and Raman spectroscopy (RS) indicated that the films grown at room temperature were…
The difference in corrosion inhibition behavior of imidazole deposited on iron by two different methods has been examined using Electrochemical Impedance Spectroscopy (EIS) and X-ray Photoelectron Spectroscopy (XPS). Adding imidazole directly into the aqueous corrosive medium has been observed to provide greater prote…
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…