Materials Literature
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Calcium aluminates have a decisive influence on the hydraulic activity of cement, in this regard, detailed study of them is an urgent task. The aim of this study is to determine the phase composition and detailed analysis of the structural-phase state of monoaluminate calcium by X-ray analysis. To research monoalumina…
In this paper, pure ZnO nanoparticles were prepared by electrospining method with the post-annealing in air without any ferromagnetic dopant. The results of X-ray diffraction and Raman spectra showed that the samples have a single phase with wurtzite structure and are absent of impurity phases. High-resolution transmi…
This paper presents results and discussion from a comprehensive morphological and crystallographic characterization of nickel nanowires synthesized by template-based electrodeposition method. In particular, the influence of magnetic and electric field (current density) conditions during the synthesis of nickel nanowir…
The polymer nano composite possess good priority recently for engineering applications. Especially the electrical insulating materials attract the high performance of nano composites. In this work the ballmill synthesiation process of nano sized Alumina (<TEX>$Al_2O_3$</TEX>), the preparation of new nano composite mat…
Ternary Ag/Polyaniline/Au nanocomposites were synthesized successfully by immobilizing of Au nanoparticles (NPs) on the surface of Ag/Polyaniline (PANI) nanocomposites. Ag/PANI nanocomposites were prepared via in situ chemical polymerization of aniline in the presence of 4-aminothiophenol (4-ATP) capped silver colloid…
An AB2 monomer obtained via the reaction of hexamethylene diisocyanate with 1,3-diazidopropan-2-ol and 2-propyn-1-ol contains one triple bond (A) and two azide groups (B2). Hyperbranched urethane-triazole polymers were synthesized through stepwise polymerization of this monomer via 1,3-dipolar cycloaddition. Owing to…
The properties of alternative metals to Cu and W for interconnect applications are reviewed based on first-principles simulations and benchmarked in terms of intrinsic bulk resistivity and electromigration.
To distinguish the ultraviolet (UV) photoresponse of Ohmic and Schottky contact devices, we have fabricated symmetrical and nonsymmetrical devices by standard lithography based on a single WO 3 nanowire. For the Ohmic contact device, the photocurrent can change from 100 nA to 300 nA. Even 200 s under UV illumination,…
Due to its atomic structure with sp2hybrid orbitals and unique electronic properties, graphene has an extraordinarily high thermal conductivity which has been reported to be up to 5000 W/mK. As a consequence, the use of graphene-based materials for thermal management has been subject to substantial attention during re…
5,10,15,20-Tetranitro-2,3,7,8,12,13,17,18-octaethylporphyrin has been prepared, and its acid-basic properties have been studied in acetonitrile by titration with 1,8-diazabicyclo [5.4.0]undec-7-ene and perchloric acid. The substituted porphyrin ability towards complex formation with zinc acetate has been studied in ac…
The nanohardness of submicrocrystalline aluminum alloys produced by dynamic channel angular pressing has been measured. It has been shown that the nanohardness of the severely deformed material depends on the characteristics of its structural state. Grain refinement and changes in the density of dislocations have an a…
Liquid foams are omnipresent in everyday life, but little is understood about their properties. On Earth, the liquid rapidly drains out of the foam because of gravity, leading to rupture of the thin liquid films between bubbles. Several questions arise: are liquid foams more stable in microgravity environments? Can pu…
Advanced electrodes composed of mesoporous NiCo2O4 nanowire arrays on carbon textiles are efficiently fabricated by X. G. Zhang and co-workers. The electrode architectures presented on page 2630 promise fast electron transport by direct connection to the growth substrate and facileion diffusion paths provided by both…
Compositions based on polyvinylchloride (PVC), which is sensitive to thermal aging, are used for the majority of electric cables as polymeric insulation. It is shown for the first time by the example of the most widespread polymeric insulation, which is made of polyvinylchloride preliminarily subjected to partial ther…
We rigorously derive a formula for the terminal velocity of a small bubble in a vertically vibrated viscous incompressible liquid starting from the full Navier-Stokes equations and the exact boundary conditions at the bubble surface. This formula is derived using a perturbation analysis in which the small parameter is…
The metal-insulator transition (MIT) in strong correlated electron materials can be induced by external perturbation in forms of thermal, electrical, optical, or magnetic fields. We report on the DC current induced MIT in epitaxial Sm0.6Nd0.4NiO3 (SNNO) thin film deposited by pulsed laser deposition on (001)-LaAlO3 su…
I-V dependences of sol-gel PZT thin films containing areas with negative differential resistivity are studied. For their simulation a modified model taking into account simultaneous existence of different leakage components (the Dawber-Scott diffusion current, the ohmic one, and space charge limited one) is proposed.…
Abstract Nanoneedle structures composed of a porphyrin derivative combined with a tris(bipyridine)ruthenium have been conveniently fabricated on an indium tin oxide electrode via continuous silane coupling reaction that proceeds on the electrode immersed in a solution of the porphyrin derivative and tetrachlorosilane.…
We study the heat generation by an electric current in a quantum dot (QD) molecular coupled to a single-model phonon bath in the Coulomb blockade regime. It is found that when the system is driven out of equilibrium by the thermal bias applied across the two terminals of the structure, the heat flowing between the QD…
Albumin is the most abundant protein found in human serum and sinovial fluids. Investigations on its effects on the corrosion resistance of metallic biomaterials have led to controversial conclusions. The BSA (bovine serum albumin) concentration used in most of the studies is below the usual concentration found in the…