Materials Literature
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We numerically investigate the transmission properties of a subwavelength composite hole-pillar array. As the radius of the pillar increases, the transmission properties experience a complex evolution. It is found that the magnetic dipole resonance of the pillar suppresses the surface plasmon polariton resonance (SPPR…
The development of ultra-wideband composite absorbers of electromagnetic waves depends largely on finding the best combination of a medium’s characteristics that determine its absorption capacity. It is possible to achieve a higher level of absorption in a wider frequency band by combining a variety of mechanisms that…
This paper presents the implementation for the first time of a porous SiOCH thin layer as stationary phase for silicon microcolumns for gas chromatography (GC). Deposition of the hybrid layer was obtained by plasma-enhanced-chemical-vapor-deposition (PECVD) with a porogen approach. Conformal and collective coating of…
Safe operation of elements of power systems plays a crucial role in maintaining the reliability and safety of the system. Transformers being a key element in power systems need to be maintained and monitored on a regular basis. Dissolved gas analysis has been used as a reliable tool in maintaining the safe operation o…
This article discusses physicochemical investigations into the electrode passivation of metallic nickel in a sulfuric acid solution (100 g/L, 20°C) during its polarization by direct current. Using X-ray photoelectron spectroscopy, it has been established that a layer of nickel hydrosulfate of the composition Ni(OH) 0.…
Abstract New, stable, and glyoco-derivatized gold nanorods (GNRs) were prepared using developed amphiphilic block glycopolymers poly[(lactose)m-b-(pyridine)n] to engineer self-organized, densely packed glycopolymeric recognition layers and generate a multivalent binding cavity onto the gold surface. We report a rapid…
The localized surface plasmon (LSP) properties of Al nanorod with Au coating have been investigated by using the quasi-static calculation. Because of the anisotropic plasmon splitting and the plasmon coupling between the Al and Au surfaces, the band number of LSP in the Al-Au core-shell nanorod could be tuned from 2 t…
This research demonstrates laser-assisted fabrication of high-efficiency diffraction gratings in fused-silica glass samples. Initially, femtosecond laser pulses are used to engrave diffraction gratings on the glass surfaces. Then, these micro-patterned glass samples undergo CO 2 laser polishing process. unpolished dif…
In this paper, spherical nanohydroxyapatite was synthesized by hydrothermal method. During the synthesizing process, different amount of L-lysine template was added with the hydrothermal temperature 185 °C and the time 25 h. The products were characterized by using FTIR, XRD and TEM. Results showed that the rod-like n…
Improvement of the technology for producing modified polytetrafluoroethylene towards the application of ultrasound of high intensity directly in pressing composite substantially improves its mechanical and tribological properties. Introduction of ultrasonic vibrations in compressible material is shown to increase the…
Nickel(II)-DHS complex was obtained from N,N′-bis(2,5-dihydroxybenzylidene)-1,2-diaminoethane (H2DHS) ligand and nickel acetate tetrahydrated in ethanolic solution with stirring under reflux. This complex, dissolved in an alkaline solution, was oxidized to form electroactive films strongly adhered on the ITO (indium t…
The complex [CdI 2 (4-CNPy) 2 ] ( I ) was obtained by a reaction of CdI 2 with 4-cyanopyridine (4-CNPy, C 6 H 4 N 2 ) and structurally characterized (CIF file CCDC no. 983377). The crystals of complex I are monoclinic, space group C 2, a = 24.698(5) Å, b = 4.127(1) Å, c = 7.597(2) Å, β = 96.05(1)°, V = 770.0(3) Å 3 ,…
We have systematically studied the structural, electronic and mechanical properties of a novel superhard sp 3 carbon allotrope ( Amm 2-carbon) based on the density functional theory (DFT). This carbon allotrope was identified using a developed methodology in the theoretical design of superhard materials based on the C…
The ability of cyclodextrins to facilitate inclusion of chemical molecules can be exploited to obtain new adsorbent materials for organic pollutants removal such as synthetic dyes from wastewater. In this work we report a study on the formation of the complex acrylamidomethylated-β-cyclodextrin, then on the grafting o…
This study is devoted to the synthesis and investigation of the Mo5SiB2-based ceramic material (T 2 phase). The influence of the initial temperature on basic combustion parameters is shown. It is found that preheating the reaction mixture enables the initiation of the combustion in the self-oscillatory mode and the in…
The kinetics of sample wear on a four-ball friction-testing machine using various lubricants is analyzed. It is shown that the growth of the contact-patch area on the balls obeys the kinetic second-order equation, which, within the limits, corresponds to catastrophic wear. The linear wear rates and the strain level of…
The results of studying parameters of the surface layer after the tribological testing of different materials using a low-vacuum Phenom ProX scanning electron microscope are presented. It is shown that its use for the analysis of surface layers provides a very accurate estimate of their main parameters, i.e., volume t…
The transmission/reflection spectra of bilayer structures consisting of thin amorphous and polycrystalline Pb(Zr 0.52 Ti 0.48 )O 3 ferroelectric films deposited on dielectric substrates of magnesium oxide MgO and sapphire α-Al 2 O 3 were measured in the frequency range of 5–4000 cm −1 . Based on these spectra and usin…
Due to an increased concern about the global energy crisis and environmental pollution, microbial fuel cells (MFCs) have been a major focus for renewable energy production. To date, however, a surprisingly small number of bacterial strains and their optimal growth conditions have been investigated for use in MFCs, rev…
Low-temperature synthetic methods (the molecular layering and pyrolysis of a liquid aerosol) for the nanostructured oxide films for the gas sensors based on zirconium dioxides and rare earth element (Ce, Y, and Tb) oxides sensitive to the oxygen-impoverished media and ozone have been suggested. It has been shown that…