Materials Literature
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Fast-growing poplar wood, Populus ussuriensis Kom, was used to prepare novel wood-polymer composite by the in-situ polymerization of methyl methacrylate (MMA) and styrene (St). SEM observation and FTIR analysis indicated that the resulted polymer well filled up wood cell lumen and physically reinforce wood matrix. The…
Various morphologies and microstructures of carbon nanosheets (CNSs) were fabricated using microwave plasma enhanced chemical vapor deposition with different CH4 ratios in Ar gas below 500 oC. With increasing CH4 supplies, the CNSs decrease in flake size, as confirmed by scanning electron microscopy, transmission elec…
Undoped and Mg-doped ZnO thin films were deposited on Si (111) and quartz substrates by using the sol-gel method. Microstructure, surface topography and water contact angle of the thin films have been measured by X-ray diffraction (XRD), an atomic force microscope (AFM) and water contact angle apparatus, respectively.…
The specific features of the antiferromagnetic domain structure, magnetization, and polarization induced by an inhomogeneous micromagnetic distribution in films of bismuth ferrite multiferroics have been investigated. It has been shown that the magnetic domain structure correlates with the ferroelectric domain structu…
In this paper, we report a study on the optical and the electrical properties of pure cotton fibers (CF) from chemically surface- and morphology-modified samples coated with poly [2-methoxy-5-(2-ethylhexyloxy)-1, 4-phenylenevinylene] (MEH-PPV) polymer by using a dip-coating method. The properties of the treated and co…
Graphene is a very promising electronic material that has attracted vast research interests due to its unique electronic properties [1]. In this paper, a graphene-based FET-like aptamer sensor is modelled for the case of an aptamer that binds to a cocaine surrogate. Methylene-blue (MB) is a nanoscale molecule that fun…
We present a comprehensive study of magnetic properties of Cr8F8(Piv)16 molecular ring (in short Cr8) using the package SIESTA with several choices of chromium pseudopotential parameters. We use generalized gradient approximation to investigate properties of Cr8 ring approximated by replacing the pivallic group by H a…
The magnetodielectric effect (the influence of a magnetic field H on the dielectric constant ɛ) and the magnetoelectric effect (the influence of an electric field E on the magnetoelectric constant α) of the PbFe1/2Nb1/2O3 ceramics have been investigated at temperatures T in the range from 50 to 200°C, including the Cu…
Friction behaviors of hydrogenated diamond-like carbon (H-DLC) films are investigated on a ball-on-disk type tribometer in dry N 2 and dry vacuum. The result shows that the friction behaviors of the H-DLC films are very sensitive to the testing environment, the H-DLC films exhibit a very low friction coefficient of 0.…
The electronic structures and field emission properties of capped CNT55 systems with or without alkali metal atom adsorption were systematically investigated by density functional theory calculation. The results indicate that the adsorption of alkali metal on the center site of a CNT tip is energetically favorable. In…
Optical properties of periodically rippled graphene depending on the direction of hexagonal layer bending were investigated using density functional theory within the random-phase approximation. The corrugation was demonstrated to allow transitions being forbidden in the flat structure, which produce new resonances in…
Super-hydrophobic Polypropylene surfaces were prepared employing combination method of replicating an artificial template and subsequent lifting off the master via a splitting way. The super-hydrophobic polypropylene surface, which was prepared using a 500-mesh PTFE-coated sieve, has gradient structures that microbump…
The chemical and adsorption-structural properties of natural nanoporous mineral sorbent M 45 C 20 having two main components (clay-montmorillonite and zeolite-clinoptilolite) and treated with 2M NaOH solution are investigated. It is ascertained based on the results of chemical analysis, X-ray diffraction, electron mic…
The forced nonlinear precession of magnetization vector in the normally magnetized magnetic plate is examined. Investigations are performed under orientational transition conditions at the asymmetric orientations of transverse and longitudinal ac fields. It has been revealed that the precession of equilibrium position…
In this work the possibility to apply graphite oxide (GO) as an intumescent flame retardant added in situ during suspension polymerization of styrene was studied. Synthesis of GO was carried out starting from natural flake graphites with different carbon content and particle size (between 45 and 500 žm). The obtained…
Transport in nanowires and nanographene with emphasis on nanotubes is reviewed from classical to quantum, low-field to high-field, nondegenrate to degenerate, scattering limited to ballistic, and beyond. Nonequilibrium Arora distribution function (NEADF) is shown to be an outgrowth of the Fermi-Dirac statistics by inc…
The temperature dependence of the spin lifetime and spin diffusion coefficient of exfoliated multilayer graphene is measured using nonlocal spin detection and spin precession measurements. Low impedance cobalt contacts are utilized for spin injection and readout. A decrease in spin lifetime with increasing temperature…
The precipitation of nanosized crystals CuBr and CuCl in potassium aluminoborate glasses containing additives of jointly introduced Cu and Br, as well as Cu and Cl, respectively, has been studied by the methods of small-angle X-ray scattering (SAXS) and X-ray powder diffraction (XRPD) analysis. It has been found that,…
Abstract Modelling ductile damage is one of the most important applications of continuum damage mechanics (CDM) models. Scientists have previously tried to identify the damage parameters and have calibrated the failure behaviour of different materials using CDM models. However, more comprehensive studies are still nee…
Three microbial polysaccharides, namely welan gum, scleroglucan, and EPS I, a novel polysaccharide obtained from a newly isolated bacillus species with structural similarities to xanthan gum, were employed in the fabrication of bio-nanocomposites based on layered double hydroxides (LDH). Synthesis was performed by dir…