Materials Literature
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A poly(vinylpyrrolidone-co-butyl acrylate) (60VP-40BA) membrane is synthesized as a tractable and hydrophilic material, obtaining a water-swelling percentage around 60%. An investigation of molecular mobility by means of differential scanning calorimetry, dynamic mechanical analysis and broadband dielectric relaxation…
BACKGROUND: Polyelectrolyte multilayer (PEMs) films made of poly(allylamine hydrochloride) (PAH) as polycation and poly(styrene sulfonate) (PSS) as polyanion, with a PAH ending layer, can be used as a coating in order to improve the anti-thrombogenicity and patency of vascular grafts in vascular engineering field. The…
Incorporation of materials such as metal oxides into the graphene matrix has been proved to be an effective approach to fabricate high performance electrode material for electrochemical energy storage devices. In this work, we report a novel strategy to fabricate MnO2-graphene nanocomposites by ripening of amorphous M…
Samarium-Dysprosium substituted strontium ferrite nanoparticles with composition of SrFe12-xDyx/2Smx/2O19(x = 0-2.5 in a step of x = 0.5) were synthesized and then deposited on the outer surface of multiwalled carbon nanotubes (MWCNTs) by a sol-gel method. The volume percentage of carbon nanotubes in nanocomposites wa…
The article is devoted to the process of liquid spraying by the ultrasonic radiator in the form of disk. New functional possibilities of the ultrasonic disk radiators during liquid spraying were studied. The results of productivity and power inputs for spraying at the application of different systems of fluid supply w…
By the interaction between (Et 4 N) 2 [Mo 2 O 2 S 8 ] and I 2 in DMF with a subsequent addition of 2,2′-bipyridine or 1,10-phenanthroline, new binuclear complexes [Mo 2 O 2 S 2 I 2 (bipy) 2 ] ( 1 ) and [Mo 2 O 2 S 2 I 2 (phen) 2 ] ( 2 ) are obtained. The structure of [Mo 2 O 2 S 2 I 2 (bipy) 2 ] is determined using si…
First principles calculations based on the density functional theory of the electronic structure, elastic and lattice vibrational properties of orthorhombic CaSnO 3 are carried out using standard functional approximation and density functional perturbation theory. The results show that CaSnO 3 is an insulator with an…
The effects of Y on the microstructure and mechanical properties of the solution treated Mg–6Zn–0·5Ca alloys were investigated in this study. The results indicated that the alloy was mainly composed of α-Mg solid solution and the secondary phases of MgZn2, Ca2Mg6Zn3 and Mg12ZnY. The grains size of the solution treated…
Five cyanide complexes, [Ni(N-bishydeten)Pd(CN)4] (1), [Cu(N-bishydeten)Pd(μ-CN)2(CN)2]n (2), [Cu(N-bishydeten)2][Pd(CN)4] (3), [Zn(N-bishydeten)Pd(CN)4] (4), and [Cd(N-bishydeten)2][Pd(CN)4] (5) (N-bishydeten = N,N-bis(2-hydroxyethyl)-ethylenediamine), have been synthesized and characterized using various techniques.…
After the report in carbon nanotubes (CNTs) by Iijima, a new era in nanocomposites and nanomaterials started. In order to reach the full potential of the use of CNTs several challenges must be overcome, especially three of them: (1) homogeneous dispersion; (2) stabilization of the dispersion in a media; and (3) strong…
Recently nanoparticles have been extensively studied and have proven to be a promising candidate for cancer treatment and diagnosis. In the current study, we examined the chemo-sensitizing activity of a mixture of nanodiamond (ND) and nanoplatinum (NP) solution known as DPV576, against multidrug-resistant (MDR) human…
In the present study, the effective elastic properties of multifunctional carbon nanotube composites are derived due to the agglomeration of straight circular carbon nanotubes dispersed in soft polymer matrices. The agglomeration of CNTs is common due to the size of nanotubes, which is at nanoscales. Furthermore, it h…
This study presents the development of a non-destructive method of detecting stress as a function of depth, useful for inspecting steel structures and components without the need to calibrate against x-ray diffraction data. A new frequency-dependent model for Barkhausen emissions based on the attenuation of emission w…
A physical mechanism is proposed explaining rapid (for a time of ∼10 −7 s) increase in the current during an electrical breakdown of polymer dielectrics. Accumulation of positive molecular ions and electrons in a local region of a polymer as a result of field ionization of macromolecules is considered as the formation…
Strip casting technique was used to prepare anisotropic Sm2Fe17NXcompounds. It was found that single phase Sm2Fe17compound could be obtained by this technique without postannealing treatment. The microstructure studies of the Sm2Fe17strips showed that not only the grain size in the strips was small, but also the size…
The operation of tungsten tip field emitters coated by activated fullerenes in technical vacuum is studied. Ways of emitter training to provide the self-reproducibility of the coatings and their long service life under intense ion bombardment in wide ranges of pressures, from 2 × 10 −8 to (5–7) × 10 −7 Torr, and emiss…
The crystal structure, electron density distribution, and energy, kinetic, and magnetic properties of the n-ZrNiSn intermetallic semiconductor heavily doped with a Ni impurity are investigated. The effect of the accumulation of an excess number of Ni1 + x atoms in tetrahedral interstices of the crystal structure of th…
The results of an experimental study of organic light-emitting diodes (LEDs) with luminescent layers based on two types of CdSe/CdS semiconductor quantum dots (QDs) with an average CdSe core diameter of 3 and 5 nm and a characteristic CdS shell thickness of 0.5 nm are presented. The dependences of the LED efficiency o…
The magnetic permeability and dielectric permittivity of M-type barium hexaferrites (BaM) sintered at 920 °C with different additive amount of Bi2O3are studied in Ka-band frequencies (26.5 ~ 40 GHz). The permeability and permittivity spectra of these low-temperature sintered BaM are determined for the first time in th…
This study introduces an experimental method for determining the parasitic reactive components that appear in a thermoelectric module (TEM). In most cases, a TEM is referred to by taking into account only the constant values of the internal electrical resistance, Seebeck coefficient and thermal conductivity. The curre…