Materials Literature
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The crystal structure of angelaite, ideally Cu 2 AgPbBiS 4 , a 12.734(5), b 4.032(1), c 14.633(5) A, V 751.2(5) A 3 , space group Pnma, Z = 4, D calc = 6.89 g.cm −3 , from the Angela mine, Los Manantiales district, province of Chubut, Argentina, has been solved by direct methods and refined to R 1 = 6.47% on the basis…
Highly stable and strong green luminescent ZnO/Cd(OH) 2 core-shell nanoparticles have been synthesised by simple sol-gel route.X-ray diffraction (XRD) and energy dispersive analysis of X-rays confirm the formation of ZnO/Cd(OH) 2 core-shell nanoparticles.The XRD and UV-visible spectroscopy shows that ZnO core size can…
The electrical conductivity of a two-dimensional structurally anisotropic model for a composite is considered. The model represents an isotropic matrix with a system of nonconducting inclusions in the form of infinitely thin straight line segments (scratches). The scratches make an angle θ or −θ with a preferred axis…
Titanium oxide (TiO2) nanofibers were formed by calcination of poly(vinyl alcohol) (PVA)Ti lactate hybrid precursor nanofibers in air. The fiber diameters of the PVA-Ti lactate hybrid nanofibers were 200-350 nm, and the fiber diameters of the TiO2 nanofibers were 7080% of those of the PVA-Ti lactate hybrid nanofibers.…
Biodegradable nanocomposite based on poly(butylene succinate) (PBSU) and multi-walled carbon nanotubes (MWNTs) was prepared by solution blending method at 1 wt% MWNTs loading. Scanning electron microscopic observation illustrates a homogeneous distribution of MWNTs in the PBSU matrix. Differential scanning calorimetry…
We have characterized a portion of cotype billingsleyite, Ag 7 (As,Sb)S 6 , a rare As 5+ -bearing sulfosalt from the silver ores of the North Lily mine, East Tintic district, Utah, USA, by single-crystal X-ray diffraction and electron-microprobe analysis. We found billingsleyite to be structurally identical to synthet…
Molecular-beam epitaxy grown, 5 nm thick annealed Ga0.95Mn0.05As films demonstrate transition from metallic to insulating state for sheet resistances near resistance quantum, which we connect with the two-dimensional hole localization. Below the metal-insulator transition we found the giant anisotropic magnetoresistan…
Intrinsic and extrinsic optical fiber-based sensors are promising devices to be used in very different and complex environments, by their very nature: capabilities to work under electromagnetic fields; possibility to carry multiplexed signals (time, wavelength multiplexing); small size and low mass; ability to handle…
Abstract The novel phenomena of irreversible changes in structure and main physical properties of FINEMET and Metglas amorphous metallic alloys (AMA) after low-temperature treatment (LTT) (so called ΔT effect) are studied theoretically and experimentally. It is shown theoretically that the cooling process in AMA durin…
Enhancing the operation life time or the electrochemical durability is one of the key issues in electrochromic material studies. It is generally accepted that the inorganic–organic hybrid structure is one of the effective ways to enhance the chemical stability of the material. In this study, an electrochromic film mad…
We report the results of dielectric spectroscopy on La 15/8 Sr 1/8 NiO 4 , performed in a broad temperature and frequency range. This material exhibits extremely high ("colossal") dielectric constants ' . Room-temperature values ' > 10 4 are found, remaining colossal up to the GHz-regime, which is of high relevance fo…
In this chapter, the author will introduce the basic properties of Bi doped silica glass (BiSG), such as a phase diagram and spectroscopic properties, and then mainly talk about the origine of luminescent center.
The wetting properties of the material can be altered by changing the surface topography. We have demonstrated the controlling of the wetting properties of the metal surface by texturing it using femtosecond laser ablation. Contact angles well above 150 degrees can be obtained to the steel sample using self-organized…
Smectitic clay minerals are frequently identified in mangrove soils, but there is little information about their types and origins. Besides their importance in the agronomical and geotechnical areas, smectites play an important environmental role by adsorbing nutrients, organic pollutants and heavy metals. Smectites f…
Infrared emission has been observed for the nitrogen-vacancy (NV −) colour centre in diamond, in addition to the characteristic red emission of this centre [1]. However, this infrared emission zero-phonon line at 1046 nm is about four orders of magnitude weaker than the red emission. This is somewhat surprising, as a…
Two series of poly(ester urethane) (PUR) elastomers, containing poly(?-caprolactone) diol of Mn=2000 as soft segments were synthesized. In each series the same diisocyanate in hard segment, i.e., 1,6-hexamethylenediisocyanate was used in the same content. The PUR polymers were prepared in two-step polymerization in th…
A formula for making paint was developed using waste expanded polystyrene foam (EPS) as a binder. This method replaces the alkyd resin in most commercial paint, which is derived from the byproducts of refining crude oil. Experimental results showed that 27% waste polystyrene foam can be incorporated in the paint formu…
Previously, iron—silicon alloys were investigated using X-ray diffraction and Mössbauer spectroscopy. It was demonstrated that, at low silicon concentrations, the alloys undergo a local separation into regions of the α iron phase depleted in silicon and silicon-rich clusters with a B 2 ordering. The structure of local…
Abstract Single walled carbon nanotubes functionalized with an aromatic diamine have been successfully used to prepare bucky gel layers by mixing with an imidazolium based ionic liquid, allowing to build bimorph actuators that significantly outperform those prepared by using the pristine or oxidized carbon nanotubes.…
We demonstrate that one-dimensional indium tin oxide nanorods (ITO NRs) with high tin-incorporation ratio can be readily produced with a very good control over size and morphology using a gas-phase synthetic approach. Our current study presents a straightforward and facile growth route to synthesize ITO NRs with the a…