Materials Literature
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This study chose the propiconazole and nano-zinc oxide of different particle size as the study object. The single and combined toxicity on the mouse embryonic fibroblast cell (NIH/3T3) was researched. The results showed that the cell growth was inhibited by propiconazole and nano zinc oxide of different concentrations…
The results of numerical finite element modeling of microdestruction of spatially reinforced composite materials, based on the method of asymptotic averaging and the method of finite element solution of local problems on periodicity cells, are presented. The modified Pisarenko−Lebedev model has been used as a criterio…
The growth-controlled synthesis of zinc oxide nanorods (ZnO NR) in the aqueous phase has been investigated. The rods were grown on ZnO films previously deposited onto Si(100) and indium tin oxide (ITO) substrates by RF magnetron sputtering. The formation of the rods took place in the presence of hexamethylenetetramine…
A multi‐electrolyte‐step (MES) anodic aluminum oxide (AAO) method was used to achieve nanochannel arrays with good circularity and periodic structure. The nano‐channel array fabrication process included immersion in a phosphoric acid solution with a 120–150 bias voltage. Bowl‐shaped structures were then formed by remo…
Complex oxide nanocrystals with a spinel structure show their remarkable optical, electronic, mechanical, thermal, and magnetic properties. In this study, we present a simple yet versatile strategy to grow self-assembled epitaxial CoFe2O4 nanocrystals with well-controlled size (less than 10 nm) and single orientation.…
The influence of water-soluble cationic meso-tetra-(4 N-oxyethylpyridyl)porphyrin (H2TOEPyP4) and it’s metallocomplexes with Ni, Cu, Co, and Zn on hydrodynamic and spectral behavior of DNA solutions has been studied by UV/Vis absorption and viscosity measurement. It was shown that the presence of planar porphyrins suc…
Material defects formed while manufacturing, fabricating and material handling are crucial in deciding the fatigue life of machine member. Research reports the modelings of effect of a defect upon the high cycle fatigue (HCF) behavior of materials are sparse. This paper attempts to model the effect of a defect over th…
The excited state relaxation of two types of azobenzene derivative excited at 350 nm in the short-wavelength (S2(π, π*)) band was studied by transient absorption spectroscopy. We compared the relaxation dynamics and the time-resolved anisotropic relaxation properties of these two molecules in liquid solution and in bu…
A new class of biodegradable functional polymers – epoxy-poly(ester amide)s (EPEAs), was synthesized for the first time on the basis of naturally occurring α-amino acids, fatty diols and cis- and trans-epoxysuccinic acids. The syntheses were conducted via both solution Active Polycondensation and Interfacial Polyconde…
Supported and stable inorganic crystals in nanometric size, such as PbS or other quantum dots, are very desired materials in the form of thin films for the application in technological areas. Herein, an approach to the growth of PbS crystals in poly(acrylic acid) (PAA) ultrathin film covalently immobilized in the poly…
Reduction of Cu(II) cations immobilized as cross-linkers in polyacrylate network colloids produce relatively small (~3 nm) Cu metal particles which are further tuned to smaller size (~1.5 nm) by partially substituting Ca(+2) for Cu(+2) in the polymer network colloid.
A surface-enhanced Raman scattering (SERS) substrate based on porous carbon film supported Au nanoparticles (NPs) has been successfully fabricated by using an eggshell membrane as template. The as-prepared substrate exhibited excellent sensitivity toward Rhodamine 6G (R6G) at a low concentration of 1 × 10−9 M and grea…
The influence of the granule size of zinc oxide powders on the diffuse reflection spectra and their modifications caused by electron irradiation are investigated in the size range of 70–630 μm. It is ascertained that the reflection coefficient before irradiation and the coefficient of absorption induced by irradiation…
Graphene is the promising material for the gas sensing application. High sensitivity to the nitrogen dioxide and ozone allows application of the simple graphene based devices for the environmental monitoring. The aims of the work were the fabrication of reliable graphene devices and the comparison of epitaxial and CVD…
Porous electrochemical supercapacitive materials, as an important type of new-generation energy storage devices, require a detailed analysis and knowledge of their capacitive performances upon different charging/discharging regimes. The investigation of the responses to dynamic perturbations of typical representatives…
Samples of La1 − x Ca x Mn1 − z O3 + δ (x = 0.05−0.15) with deficient manganese and excess oxygen δ do not pass into a metallic state and have low spin ordering temperatures T C at acceptor Mn4+ concentrations near the percolation threshold. These results are explained by carrier localization in clusters near cation v…
Titanium dioxide (TiO2) nanoparticles labelled with 18O isotopes were prepared via a sol–gel method with titanium alkoxide and 18O water precursors. The presence of 18O in the labelled TiO2 sample was confirmed using Raman spectroscopy and secondary-ion mass spectrometry. The photocatalysis of cyclohexane under UV lig…
The direct assembly of LDH nanosheets and organic molecules, such as Mn(II)–salen complex, into a sandwich-structured nanocomposite has been achieved via a modified flocculation method. When used as a catalyst, the obtained material has superior thermal stability and catalytic properties over a material prepared using…
The Peaceman--Rachford scheme is a commonly used splitting method for discretizing semilinear evolution equations, where the vector fields are given by the sum of one linear and one nonlinear dissipative operator. Typical examples of such equations are reaction-diffusion systems and the damped wave equation. In this p…
This paper presents the optical and photophysical properties of RNA templated PbSe nanostructures in the presence of excess Pb(2+). These particles exhibit an onset of absorption in the NIR range at about 1208 nm (0.97 eV) and display weak excitonic bands at 320 nm, 405 nm and 670 nm. The excitation of these particles…