Materials Literature
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Al/ZnO:N/Al and Ni/ZnO:N/Al diode photodetectors fabricated by dc magnetron sputtering of ZnO:N films on p-Si substrates are studied. The photocurrent-to-dark current ratio equal to 250 at = 390 nm and the time constant of photoresponse about 10 s for Al/ZnO:N/Al structures with 4 m interdigital spacing was achieved.…
Since its invention in 1991, premixed combustion synthesis of fullerenic materials has been established as the major industrial process for manufacturing of these materials. Large-scale production of fullerenes such as C60, C70 and C84 has been implemented. More recently, combustion technology has been extended to the…
Pipelines exhibit a magnetic anisotropy with the easy axis in the axial direction of the pipe. Three different types of steel API 5L (X52, X56, X60) obtained from out-of-service pipeline sections were investigated with respect to their microstructure, magnetic properties, and magnetostriction. In order to measure the…
This work focuses on the impact of oxidizing (O2) and reducing plasma ashing chemistries (NH3, CH4) on the modifications of dielectric materials in a porous or an hybrid state (SiOCH matrix+porogen). The plasma ashing processes have been performed on blanket wafers using O2, NH3, and CH4 based plasmas. The modificatio…
Abstract The synthesis of 2‐hydroxy‐ N ‐[2‐(2‐hydroxy‐propionylamino)‐ethyl]propionamide (“aliphatic amidediol”) is described. Aliphatic amidediol and glycerol were used as a novel mixed plasticizer for corn starch to prepare thermoplastic starch. Fourier transform infrared (FT‐IR) spectroscopy proved that the mixture…
Thermoluminescence Theory Optically Stimulated Luminescence Luminescence Dating Miscellanea Kinetics Methods General Properties.
Poly(vinyl alcohol) (PVA) is a highly versatile synthetic polymer that is formed by full or partial hydrolysis of poly(vinyl acetate) (PVAc). A wide range of PVA partially hydrolysed grades are commercially available, but the amphiphilic grades of the polymer (30-60% hydrolysis), which probably the most interesting in…
Two new mesogenic homologous series containing chloro, nitro and phenolic hydroxy groups were synthesised and their molecular structures characterised by a combination of element analysis and standard spectroscopic methods. The mesomorphic behaviour of the compounds of both series was investigated by polarising optica…
Elastic constants and bulk modulus for the tetragonal, rhombohedral, and cubic phase of Na0.5Bi0.5TiO3 crystal were calculated from the first principles. From the calculated elastic constants, other structural properties such as bulk modulus, shear modulus, Young's modulus, and Poisson's ratio can be derived using res…
In the present work, the effects of milling and calcination temperature on the compressibility and sinterability of a nanocrystalline Al 2 O 3 –Y 3 Al 5 O 12 composite powder prepared by an aqueous sol–gel method were investigated. The results showed that calcination temperature has a strong influence on the sinterabi…
The goal of this study was to determine whether it was possible to avoid the formation of cobalt silicate during the preparation of silica-supported Co catalysts since this too-stable cobalt phase is detrimental to catalyst activity. The strategy was to use the strong chelating ligand ethanediamine (en) to complex Co…
This paper proposes a new perspective on the analysis of fabric structures – the concept that material testing and computational mechanics are mutually dependent and, by implication, not to be considered as independent. Current representations of fabric stress-strain behaviour are based on plane-stress assumptions, an…
The migration behaviour of polymer additives in 17 polypropylene (PP) samples is described. These samples cover the major types of PP used in food packaging. The diffusion coefficients of additives with relatively small molecular masses, M(r) = 136 (limonene), as well as the migration of typical antioxidants used in P…
Abstract Summary: Semi crystalline and amorphous poly(lactic acid) (PLA) thin films exhibit different glass transition temperature and behaviour, as revealed by ellipsometry. For semi‐crystalline poly(L‐lactic acid) (PLLA) thin film (with crystalline content between 40 and 60%), the glass transition temperature (T g )…
A high-density vertically well-aligned ZnO nanoneedle array was fabricated on a ZnO-buffer film on silicon substrates by metal-organic chemical vapor deposition at a growth temperature of 480–500°C. Highly crystalline ZnO nanoneedle arrays showed a strong near-bandedge emission at 380nm in room-temperature photolumine…
Single-phase zinc aluminate (ZnAl2O4) with the spinel structure was successfully obtained by the Pechini method at different calcining temperatures for 4 hours. The nanoparticles are highly crystalline with no impurities related to ZnO or Al2O3 residues. The microstructural environment of aluminium ions changes with h…
A new genus and species in the Thalassiosiraceae, Thalassiosirales is described from Fontana Lake, a reservoir in the Tennessee River drainage, North Carolina, which makes up much of the southern boundary of Great Smoky Mountains National Park. The newly described taxon, Spicaticribra kingstonii, most closely resemble…
Multilayered ZnO films were deposited by rf magnetron sputtering on silicon and sapphire substrates. The aim of this work is to improve structural quality of ZnO thin films grown on just listed substrates. Presented X-ray diffraction data testify to remarkable relaxation of compressive stress in twoand three-layered Z…
We investigated structural and magnetic properties of CoMnSi (CMS) Heusler alloy films and giant magneto-resistance (GMR) ratio of current-perpendicular-to-plane (CPP) GMR sensor elements. The films were deposited with magnetron sputtering method and annealed at 673 K and 773 K. The CMS films were identified as B2 str…
Xocolatlite, Ca 2 Mn 4+ 2 Te 6+ 2 O 12 ·H 2 O, is a rare new mineral from the Moctezuma deposit in Sonora, Mexico. It occurs as chocolate-brown crystalline crusts on a quartz matrix. Xocolatlite has a copperbrown streak, vitreous luster, and is transparent. Individual crystals show a micaceous habit. Refractive indice…