Materials Literature
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A series of melts with carbon content 1.38–4.16% and that of vanadium 5.25–15.50% was made. The X-ray diffraction of the examined alloys revealed the presence of three phases, i.e. ferrite, alloyed cementite, and VCx carbide. The relationships between the content of carbon and vanadium corresponding to eutectic struct…
Effects of anions and cations in the supporting electrolyte on the storage capacity of a hybrid capacitor were studied, and it was found that the large discharge capacity of 95 mAh/g was achieved by using triethylmethylammonium as a supporting electrolyte. Storage mechanisms of positive and negative electrodes were al…
The mechanism of anodic alkaline dissolution of aluminum was investigated through the analysis of cyclic voltammetry (CV) and potential step experiments. Attention was focused on the role of aluminum hydride as a reaction intermediate, as suggested by the recent detection of formation during open-circuit dissolution.…
In this work we prepared icosahedral gold particles using hydrogen tetrachloroaurate(III) hydrate (HAuCl4·3H2O) as precursor and poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymers as both reductant and directing agent. The products were characterized by scanning electron…
Electron paramagnetic resonance spectroscopy has unmasked for the first time the spin-delocalised doublet- and triplet-ground states of azacalix[4]arene cation radicals.
β-SiAlON: Eu2+ oxynitride green phosphors with compositions of EuxSi6-zAlzOzN8-z (x=0.0065 -0.0390, z=0.231) were successfully prepared using GPS (gas pressured sintering) method. The phase purity, microstructure, luminescent and thermal quenching properties for the prepared β-SiAlON:Eu2+ phosphors were investigated i…
Recently a software package for the structure analysis of quasicrystals has been released, giving a better environment for determining quasicrystal structures. Therefore we can analyze their structures if we know data collection and indexing methods and a theory of structure analysis. For the use of the package, the s…
Rare earth (Tb or Ce)‐doped silicon oxides were deposited by electron cyclotron resonance plasma‐enhanced chemical vapour deposition (ECR‐PECVD). Silicon nanocrystals (Si‐ncs) were formed in the silicon‐rich films during certain annealing processes. Photoluminescence (PL) properties of the films were found to be highl…
The structures of a number of mono- and diboron corrole complexes have been optimized using DFT methods in order to establish regio- and stereochemical preferences for bonding of one or two boron atoms to the corrole macrocycle. The formulations of the complexes were suggested either from preliminary experimental resu…
Carbon nanotubes (CNTs) have many potential applications in biological and biomedical sciences as nanoscale probes and sensors, which need CNTs to be able to respond to biologically relevant stimuli, such as pH, temperature, glucose, glutathione, various ions, enzymes and proteins, etc. This highlight examines several…
Single-crystalline ZnTe nanowires were transformed into single-crystalline CdTe nanowires by Cd vapor transport. The composition was controlled by adjusting the reaction time, and the formation of the ZnCdTe–CdTe core–shell nanocable structure as an intermediate was observed. Their morphology and crystal structure wer…
We report a new methyltrimethoxysilane (MTMS) based route to growing a Janus silica film at the oil–water interface, which upon drying shows anisotropic wetting by water on its two surfaces. The contact angle of water on the surface grown in contact with the oil-side is found to be ∼150°, but it is much smaller, ∼65°,…
The Thaumetopoeid silkmoth Anaphe reticulata is highly abundant in equatorial and southern Africa and a potential commercial source of silk. In this paper, we report detailed structural characteristics of the silk fibroins. Comparison of the 13 C solution NMR spectra of Anaphe silk fibroin and several model peptides w…
Dispersion, the variation in propagation velocity with frequency, is one of those phenomena that people in the field of partial discharge (PD) detection have talked about since at least the early 1980s, but which is lacking a formal treatment in the literature. When one of the authors recently published an analytic th…
A Gd-doped ceria powder (GDC, Ce0.8Gd0.2O1.9) prepared from an oxalate precursor was hot-pressed at 1173-1273 K in Ar atmosphere and annealed in air at 1273-1473 K to control the bulk density and grain size. Complex impedance of GDC of the microstructures of 0.29-5.6 μm average grain size and 95-98% theoretical densit…
Photo-cross-linked poly(vinyl pyrrolidone) (PVP) and poly(ethylene oxide)(PEO)/PVP electrospun nanofibrous mats containing complex-bound iodine have been studied. FT-IR spectroscopy analyses have proved that coordination of molecular iodine with carbonyl group and nitrogen atom of pyrrolidone rings of the PVP chains h…
The Dense Plasma Focus (DPF) devices PF-1000, PF-6 and PF-5M working with different gases and in dissimilar \nirradiation modes were used to carry out experimental investigations of irradiation of a number of materials by \npowerful pulsed ion and high-temperature plasma streams. The materials under test were…
This work reports on different aspects of the electron donating ability of mixed fluoride-phosphate (FP) glasses in the system xSr(PO(3))(2)-(100-x)(MgF(2) , CaF(2), SrF(2), AlF(3)), with x ranging from 0 to 100 mol% Sr(PO(3))(2). Comparison between calculated optical basicity, Lambda(th), and experimental basicity si…
The importance of misfolding proteins forming amyloid fibrils for the aetiology of many diseases, particularly those of old age, is well recognized. This phenomenon is now thought to be a universal property of proteins, as long as appropriate conditions for loosening the native folded structure can be found, which may…
The inverse spinel CoFe2O4 is prepared as nanoparticles with a range of controlled sizes. Synthesis is performed using solvothermal and coprecipitation chemistry, and a two capping group coprecipitation procedure using oxalic acid and ethylenediamine or triethanolamine is shown to afford sub-10 nm, controlled size nan…