Materials Literature
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The laser ablation threshold energy density of the glass nanocomposites of the different composition for the YAG-Nd laser pulse radiation experimental measurements have been fulfilled. The dependences of the laser ablation threshold parameters versus the optical and physical properties of these nanocomposites have bee…
Metamaterials are artificial media designed to control electromagnetic wave propagation. Due to resonance, most present-day metamaterials inevitably suffer from narrow bandwidth, extremely limiting their practical applications. On the basis of tailored properties, a metamaterial within which each distinct unit cell re…
The relationships between corrosion inhibition performance of three kinds of benzimidazole inhibitors compounds and their molecular electronic properties have been investigated using quantum chemistry method. Quantum parameters such as highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUM…
In this work, we study the effect of the applied voltage form and its rise speed on breakdown voltage of polyvinyl chloride sheaths. We first present the statistical model of Weibull used for processing the results, then we describe the experimental devices. We finally study the evolution of the nominal breakdown volt…
Polymer composites with carbon nanofillers have been regarded as a promising candidate for electronic package materials. The challenge for such materials is to increase the electrical and thermal conductivity of the composites. Herein, we reported an epoxy composite film with high thermal and electrical conductivity t…
Both conventional solution-phase and direct solid-solid redox reactions between tetrathiafulvalene (TTF) and the vanadium-substituted polyoxometalate (n-Bu4N)3[SV(V)W11O40] give rise to microcrystalline or powdered semiconducting charge transfer solid material. A single-crystal X-ray structure derived from growing cry…
This work emphasis on the competence of (100)-oriented PMN–PT buffer layered (0.68 PbMg 1/3 Nb 2/3 O 3–0.32 PbTiO 3 with Pb ( Zr 0.3 Ti 0.7) O 3/ PbO x buffer layer) and (001)-oriented PMN–PT (0.67 PbMg 1/3 Nb 2/3 O 3–0.33 PbTiO 3) for low grade thermal energy harvesting using Olsen cycle. Our analysis (based on well-…
The problem of coupling the porous structure of carbon materials with their electronic structure to achieve the maximum efficient operation of an electric double layer, i.e., the interfaces with the electrolyte, was considered. The initial materials for producing activated carbon were flax and field horsetail fibers.…
Synthesis of bona fide N -confused phlorin derivatives through simple chemical reduction of N -confused porphyrin precursors using sodium borohydride, p-toluenesulfonyl hydrazide, etc. is described. Spectroscopic, X-ray diffraction analyses and DFT-assisted calculations of these species support the nonaromatic phlorin…
The photoisomerization effect on new chalcone derivative is reported. The synthesized chalcone was characterized by different spectral analysis such as1H-NMR,13C-NMR, FTIR, LCMS and UV/Vis. It revealed the photoisomerization effect in solution, theE-Zisomerization occurred around 60sec, whereasZ-Eisomerism occurred at…
This paper deals with the measurement of the magnetic properties of steel and other soft magnetic, electrical conductive, materials at high temperatures up to the Curie temperature and slightly above. At first the theory of measuring the magnetic properties at room temperature is described on the basis of the ring cor…
Finite element 2-D analysis was implemented to simulate the dielectric spectra of nanodielectrics. As a test case, silica modified with a high graft density of short molecules and a low graft density of epoxy compatible chains were incorporated into epoxy. TEM images of the composites filler distribution were used to…
We demonstrate a spray pyrolysis method to grow carbon nanotubes (CNTs) with high degree of crystallinity, aspect ratio and degree of alignment on a variety of different substrates, such as conventional steel, carbon fibres (CF) and ceramics. The process consists in the chemical vapour deposition of both a thin SiO2 l…
The aim of this study is to investigate the thermal decomposition and hydrogen release of salt-free manganese borohydride composites with metal hydrides and metal borohydrides of lithium, sodium, magnesium, and calcium. Combined thermogravimetry, differential scanning calorimetry, and mass spectrometry were performed…
Em solos ácidos de ambiente mais tropical com esmectitas, assim como em solos altamente tamponados de ambiente subtropical, contendo esmectita com hidroxi-Al entrecamadas (EHE) e, ou, vermiculita com hidroxi-Al entrecamadas (VHE), os teores de Al-KCl podem ser excepcionalmente altos; entretanto, em alguns casos não se…
ABSTRACT Microbial reduction of silver ion (conc. 1 m M AgNO 3 ) was performed by Alkaliphilus oremlandii strain ohILAs in an alkaline pH 10. The synthesized silver nanoparticle was stabilized by poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate) biopolymer which was also synthesized by the microbial culture of Alkaliphil…
The problem of k-value degradation (plasma damage) is a key issue for the integration, and it is becoming more challenging as the dielectric constant of low-k materials scales down. One way to circumvent this issue is temporarily conversion of low-k material from a porous to a dense state by filling the pores with a s…
Three oligopolymers derived from a-Naphthol (N), formaldehyde (F) with aniline (TERP-1), paraaminobenzoic acid (TERP-2) and sulphanilic acid (TER-3) were synthesized and their inhibitive action on corrosion of mid steel in 1M HCl was studied using electrochemical impedance spectroscopy (EIS), potentiodynamic polarizat…
This investigation explores DNA-binding interactions of various forms of an alkyl-substituted cationic porphyrin, H2TC3 (5,10,15,20-tetra[3-(3'-methylimidazolium-1'-yl)]porphyrin). The motivating idea is that incorporating alkyl rather than aryl substituents in the meso positions will enhance the prospects for interca…
Metamaterial (MTM) modeling and simulation using the Finite-Difference Time-Domain (FDTD) method is discussed. The frequency dependence of the permittivity and permeability of the metamaterial is modeled using the Lorentz model. All the metamaterial approaches introduced for this purpose (i.e., auxiliary differential…