Materials Literature
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This paper presents an approach for the improvement of transmittance in capacitive grid polarizer with dielectric substrates by introducing antireflection(AR) coating. The capacitive grid polarizer using Cu material is printed in the dielectric substrate of PTFE. According to different position relations between grid…
In the presented work, a new method of online processing of emission data is reported that allows us to estimate work function and geometrical parameters of the field nanostructures. The method is based on analysis of the Seppen-Katamuki chart for the current-voltage characteristics, which allows the construction of a…
Neural networks are computing models based on human brains. We propose a neural network using a field-programmable gate array (FPGA) for neurons and amorphous In-Ga-Zn-O (a-IGZO) thin films for synapses. It is found that electric current in the a-IGZO thin film gradually decreases along the time. On the other hand, th…
The reflectivity of forty-grating sections consisting of two grating periods is simulated. Close difference of two gratings periods causes similarity of the reflectivity of forty-gratings and single gratings except for the phase shift phenomenon.
Increasing awareness on negative impacts caused by conventional fillers in rubber compound such as carbon black and silica on the environment has drove researchers to focus on development of high performance alternative rubber composite materials. There are extensive research works on utilizing natural biofillers, for…
In this paper, we investigate theoretically the transmittivity spectra of one-dimensional photonic crystals with complex defect layers containing superconducting constituents. We study the influence of a geometrical position of the defect layers inside the photonic structure and the number of its periods on the photon…
Sub-wavelength periodic nano-holes produce extraordinary optical transmission (EOT) and have been used in biochemical sensing. However, to date the widely used single-layered nano-hole film turns to have reached its limit in accuracy and sensitivity. To provide new insights, this paper proposes to combine the classic…
The coexistence of the amorphous structure and crystalline hexagonal structure of ice near its melting point at normal pressure is confirmed by comparing the diffraction patterns of diffuse X-ray scattering for different amorphous structures. The diffuse X-ray scattering at an ice sample maintained at a temperature of…
The process of GaSe surface oxidation is investigated. The work function is revealed to vary by 0.5 eV within a few hours after the formation of a cleaved facet of the semiconductor surface. It is demonstrated that low-energy laser irradiation with a wavelength of 650 nm leads to the generation of an intrinsic oxide o…
Conventional metamaterials are characterized by effective permittivity and permeability with continuous values. In analogy to the digital circuit that has only two distinct states `on' and `off', we proposed the concept of coding metamaterials, which is realized by distributing coding particles `0' and `1' with opposi…
The equation of thermionic emission has been derived, which takes into account the presence of thin films of adsorbed gas-environment molecules on a cathode under conditions of high-voltage gas discharge. It is shown that the consideration of electron polaron tunneling mechanism leads to a significant (by more than an…
Об особенностях работы составного
A material case consisting of epoxy, 10 wt% carbon black (CB) and 1 wt% POSS has been fabricated and studied. After establishing that the conditions were way above the electrical percolation threshold, the effect of the degree of de-agglomeration, the use of a post-treatment and the presence of POSS were investigated.…
High-dielectric-constant (High-κ) nanocomposites are demonstrated to show great promise as energy storage materials. The introduction of high-κ nanomaterials into ferroelectric polymers has proven to be a promising strategy for the fabrication of high-κ nanocomposites. One dimensional large-aspect-ratio nanowires exhi…
The influence of the temperature variation and of the sense of this variation, increasing or decreasing, on the dielectric behavior of polypropylene (PP)-SiO2nanocomposites were studied in this work. The dielectric spectra were recorded in the range 10-2- 106Hz in three different modes of temperature variation, betwee…
Novel hybrid elastomers were prepared by speed-mixing of two virtually immiscible liquids - glycerol and polydimethylsiloxane (PDMS) prepolymer. Upon crosslinking of the PDMS phase of the resulting glycerol-in-silicone emulsion free-standing films were obtained. In this way glycerol became uniformly distributed within…
X-ray tubes with an electron source of carbon nanotubes (CNTs) have often been fabricated by vacuum brazing at high temperature, during which CNT emitters have been frequently damaged probably by reacting with other ingredients incorporated into the CNT paste. In particular, some metal or oxide fillers seemed to accel…
This paper describes measurements of the AC quantum Hall resistance in epitaxial graphene performed with a newly developed digitally assisted impedance bridge. Capacitive losses cause a negative frequency dependence of the quantum Hall resistance, in contrast to the positive frequency dependence observed in GaAs devic…
The monomer pyrrole has been polymerized by chemical route in the presence of graphene oxide (GO), reduced graphene oxide (rGO) and graphene nanoribbons (GNR) separately to prepare nanocomposites as Polypyrrole-GO (PGO), PPy-rGO (PRGO), PPy-GNR (PGNR), respectively. The morphological, chemical and structural character…
In earlier work, metasurfaces were used to redirect or focus light by tailoring the surface profile to control the phase and magnitude of the current at each of the cells comprising the metasurface. In this work, a metasurface is used to design antennas by tailoring the feed for each resonator to create optimal radiat…