Materials Literature
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In modern technology of biomedical applications, the potential of carbon nanotubes based materials has been widely used in recent years. In this paper, the preparation of the multi wall carbon nanotube (MWCNT) with biocompatibility of these composite are investigated, although many aspects have been studied separately…
Nuclear forward scattering from 57Fe isotope has been used to study depth-dependent magnetic properties of a thin Fe layer on MgO (0 0 1) substrate. Depth selectivity is achieved by using a wedge shaped Fe film with 3 nm thick 57Fe layer incorporated at varying depth. Present studies provide clear evidence against the…
With the increasing of the amount of composite insulators in power network, the transmission accidents caused by the fault of composite insulators are increased and the aging of composite insulators should be paying more attention. In the paper, fourier transform infrared spectroscopy (FTIR) is used to analysis the mo…
In order to increase the life of bituminous pavement, quality of bitumen needs to be enhanced and modified. Different dosages of nano-organic montmorillonite (nano-OMMT) were used as modifier for base asphalt. The effect of the contents of nano-OMMT on high temperature performance of asphalt was investigated. Experime…
This work focuses on the resistive switching behavior of sol-gel spin coated zinc oxide (ZnO) thin films on ITO substrate. The deposited ZnO thin films were annealed at various temperatures from 300°C to 500°C in a furnace for 60 minutes in order to study the effect of annealing temperature on the resistive switching…
Nanostructured Aluminium (Al) doped zinc oxide (ZnO) was prepared using sol-gel spin-coating method. These films were tested under different exposure of oxygen flow rates at room temperature with bias voltage applied at 5 V. The structural properties were characterized using Atomic Force Microscopy (AFM) and Field Emi…
Amorphous CuZnSnS precursor lms were prepared by solgel and spin-coating with copper chloride, zinc chloride, tin chloride and thiourea solutions as starting materials. A Cu2ZnSnS4 lm with kesterite structure and a small amount of chlorine formed when the precursor was annealed under Ar ambient at temperature above 20…
Four new meso-tetraphenylporphyrin derivatives were prepared, singly and doubly substituted with thiocarbamate and thioacetate groups. These compounds were subsequently attached to gold nanoparticles suspended in chloroform. Very different kinetics of the attachment were revealed; the process was much faster for the t…
Quasicrystals are aperiodic structures with no periodicity both in direct and reciprocal space. The diraction pattern of quasicrystals consists however of the periodic series of peaks in the scattering vector space. The intensities of the peaks of all series reduced in a proper way build up the so-called envelope func…
Carbon nanotubes (CNTs) are such promising material in future microelectronic devices due to their great property in conductivity, mechanical strength and light weight. Field effect transistor (FET) has already come to its most maximum efficiency because of their reduced size leads to decrease in their capability in c…
A large database on the elastic and electronic properties of 665 MAX (Mn+1AXn) phases with n = 1 to 4 using ab initio methods has been established (see the article by S. Aryal et al., pp. 1480–1497). Various correlations among and between them are fully explored. The key elements in the interdependence between the ela…
The properties of AZO (98-wt% ZnO, 2-wt% Al2O3) films produced in pure Ar and Ar (98%) + H 2 (2%) (H 2 -diluted Ar) by radio-frequency (RF) magnetron sputtering were investigated as functions of the substrate temperatures. H 2 -diluted Ar improved the electrical properties of the AZO films fabricated at low substrate…
Admittance spectroscopy is used to determine the cross sections and energy levels of holes in Ge/Si heterostructures with Ge quantum dots. The structures are grown by molecular-beam epitaxy. It is established that, in layers of quantum dots produced at low growth temperatures T g ≤ 450°C, the capture cross section for…
The distribution of the ferromagnetic order parameter (OP) is studied for an easy-axis type of ferromagnet under the effect of intense flow twisting applied along and perpendicular to the easy axis of a sample. The periodic changes in the OP modulus and the emergence of a perpendicular component of the magnetic OP are…
The realization of voltage tunable gradient-index fishnet metamaterials for the Ka-and mm-band is presented. For the dielectric layer of the fishnet, nematic liquid crystal is used to achieve a continuous voltage tuning of each column of the array. To control the direction of the emitted wave, a gradient in the phase…
The results of the investigations of the electron flow in Grigor’ev-Shesterkin field-emission cathode cells intended for use in microwave tubes are presented. It is shown that it is possible to develop electron-optical systems (EOSs) with field-emission cathode matrices for O-type microwave tubes whose beam emittance…
Ceramic samples of Pr0.6−xNdxSr0.3Mn1.1O3−δ (x = 0−0.6) were studied by x-ray diffraction, resistive, magnetic (χac and 55Mn NMR), magnetoresistive and electron microscopy methods. It was shown that with increasing the concentration x, the type of unit cell distortion changes from orthorhombic (x = 0–0.2) to pseudo-cu…
A natural dye extracted from purple corn cob was applied to a silk fabric using pre-mordanting method, under different conditions. It was observed that with an increase in the dye concentration, the ultraviolet (UV) protection factor (UPF) values ranged between good and very good for the silk fabric. In addition, a da…
We describe a surface integral-equation (SIE) method suitable for reliable computation of electromagnetic fields scattered by 2D periodic gratings in homogeneous 3D space in which the gratings may consist of high permittivity dielectric materials and metals. More in particular we brie y describe the formulation, the d…
We examined the electro-optical properties of a nematic liquid crystal sample whose substrates were coated with a mixture of nanofibres (NFs) and polyimide (PI). The samples coated with a NF–PI mixture showed a faster turn-off time than the sample coated with pure PI. We found that the elastic constant and the order p…