Materials Literature
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AIM: To demonstrate the design, fabrication and testing of conformable conducting biomaterials that encourage cell alignment. MATERIALS & METHODS: Thin conducting composite biomaterials based on multilayer films of poly(3.4-ethylenedioxythiophene) derivatives, chitosan and gelatin were prepared in a layer-by-layer fas…
Spin-polarized DFT has been used to perform a comparative study of the geometric structures and electronic properties for isolated M4X4 nano clusters between their two stable isomers - a planar rhombus-like 2D structure and a cubane-like 3D structure with M = Mn, Fe, Co, Ni, Cu ; X = O, S. These two structural pattern…
Graphene, a self‐supporting monolayer, has excited enormous interest over the 10 years since its discovery due to its remarkable electrical, mechanical thermal and chemical properties. Here the authors describe the authors’ work developing chemical vapour deposition methods to grow monolayer graphene on copper foil su…
Poly-β-hydroxybutyrate (PHB) may serve as one of the imperative substitutes for petroleum derived plastics because of their close functional analogy and biodegradation quality. In the present study, PHB producing ability of bacterial isolates was examined on low-cost agro industrial residues. Isolate PS-10 from domest…
A composite material based on 15-crown-5-substituted palladium(IV) porphyrinate (PdCl 2 TCP) and polystyrene is obtained that changes its luminescent properties in the red spectral region at transition from the liquid nitrogen temperature (77 K) to 358 K. Variation of fluorescence and phosphorescence spectra of the ma…
The current state of research in the field of inhibitory protection of metals from corrosion in solutions of mineral acids using α,β-unsaturated carbonyl compounds and azomethines has been considered. Literary data on protection of various steels in solutions of acids using these substances have been summarized, and f…
Summary The broad applications of silver nanoparticles (Ag NPs) and multi walled carbon nanotubes (MWCNTs) increase human exposure and thus the potential risk associated to their toxicity. Therefore, the genotoxic effects of these nanomaterials toward hepatic cells of mice were investigated. Ag NPs of size 10.0 ± 2.0…
The synthesis and crystal structures of the polymeric compounds of vanadyl (VO 2+ ) and alkaline-earth metal cations (Sr 2+ and Ca 2+ ) with the anions of substituted malonic acid analogs, R(COOH) 2 , were described. Reactions of vanadyl sulfate (VOSO 4 · 3H 2 O) with calcium and strontium salts of cyclopropane-1,1-di…
In this research, physical, thermal and mechanical properties of polypropylene composites modified with natural polymers such as starch and corn are studied. Also, the effect of adding eggshell nano-particles as fillers is investigated. 4 weight percentage of maleic anhydride as a compatibilizer of polypropylene was u…
The magnetically ordered phase of the CuCrO2 single crystal has been studied by the nuclear magnetic resonance (NMR) method on 53Cr nuclei in the absence of an external magnetic field. The 53Cr NMR spectrum is observed in the frequency range νres = 61–66 MHz. The shape of the spectrum depends on the delay tdel between…
The incorporation of defects in junction area of 1D and 2D carbon nanostructures has a major impact on properties of their 3D structures. In the present study, molecular dynamics simulation is utilized to examine the mechanical behavior of graphene sheet (GS) in carbon nanotube (CNT)-GS junctions. The tensile load was…
We investigate the structural, chemical, and magnetic properties on BiFe 0.5 Cr 0.5 O 3 (BFCO) thin films grown on (001) ( We show how highly pure BFCO films, differently from the theoretically expected ferrimagnetic behavior, present a very weak dichroic signal at Cr and Fe edges, with both moments aligned with the e…
The interaction of the Pt/SiO2 model catalysts as thin films on the surface of tantalum supports with a mixture of NO + O2 (1: 1) was studied by X-ray photoelectron spectroscopy. The pressure of the reaction mixture was varied from 6 to 64 mbar, and the temperature was varied from room temperature to 500°C. Two types…
Icosahedrite, the first natural quasicrystal with composition Al 63 Cu 24 Fe 13 , was discovered in several grains of the Khatyrka meteorite, a CV3 carbonaceous chondrite. The presence of icosahedrite associated with high-pressure phases like ahrensite and stishovite indicates formation at high pressures and temperatu…
Electrochromic devices suitable for architectural applications must exhibit acceptable levels in specific performance indicators to carry out useful energy saving functions. These parameters indicate the global response of the window to the solar radiation and completely determine the energetic performance of the glaz…
Multiferroic meta-magnetic shape memory alloys are well known for exhibiting large magnetic field induced actuation strains, giant magnetocaloric effects, magneto-resistance, and structural and magnetic glassy behaviors. Thus, they are candidates for improving modern day sensing, actuation, magneto-resistance, and sol…
The effect of precursor composition and reduction conditions on the characteristics of niobium powders obtained by magnesium reduction were studied. The hypothesis of the possible increase in the specific surface area of the powders by a large factor by using complex oxides as precursors was confirmed. With magnesium…
Corrosion performance of AISI-309 and AISI-310 exposed in NaVO3 at 700óC was studied using some electrochemical techniques named potentiodynamic polarization measurements and linear polarization resistance (Lp). Measurements of potential in time and mass loss were also obtained. From the physical characterization, it…
In this paper the authors present some of the results of research on the behavior of high entropy alloys used in ballistic protection structures. Bullet impact testing methodology and results on layered Ballistic Packages that incorporate high entropy alloys (HEA) are presented. The paper details the technological pro…
The epitaxial 200-nm-thick FeV2O4(110) films on (110)-oriented SrTiO3, LaAlO3 and MgAl2O4 substrates were fabricated for the first time by pulsed laser deposition, and the structural, magnetic, and magnetoresistance anisotropy were investigated systematically. All the films are monoclinic, whereas its bulk is cubic. C…