Materials Literature
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New types of porphyrin derivatives bearing "C-glycoside" moieties, either in 5,10,15,20- or in 5,15-meso-positions, were prepared and fully characterized. The presence of the glycosidic groups imparts to the title macrocycles, besides an amphiphilic character, a clear tendency to form chiral suprastructures upon solve…
We demonstrate here a simple method to tune the optical properties of thin films of nickel nanowires grown inside an anodic alumina oxide (AAO) template using different anodizing conditions. The optical properties of the metal plate can be effectively tuned by adjusting the thickness of porous alumina oxide. In our ca…
Cu(OH)(2) nanoribbon arrays were synthesized by a simple room-temperature solution reaction for the first time, which exhibited noticeable hydrogen storage capacity and large BET surface area.
Two novel lanthanide selenidoarsenates(v) [Ln(dien)2(micro(3)-AsSe(4))] (Ln = Nd 1, Sm 2, dien = diethylenetriamine) were synthesized by the reactions of As(2)O(3) and Se with Nd(2)O(3) or Sm(2)O(3) in dien under solvothermal conditions. 1 and 2 are in the orthorhombic crystal system with Iba2 and Pbca space groups, r…
Disposing of conventional fiber-reinforced polymers (FRPs) poses an environmentally challenging problem. Disposal of FRPs by combustion discharges carbon dioxide in the air because the resin of FRPs is made of fossil fuel. When they are disposed of in the ground, FRPs remain semi-permanently without decomposing. In re…
Highly efficient and chemically compatible LnxSr1-xCoO3-delta (Ln = La, Sm, Gd, ...)/Co3O4 electrocatalysts for oxygen reduction reaction are presented and the very low cathode polarization resistances and excellent performances implied their promising application for developing intermediate-temperature solid oxide fu…
The authors present a left-handed metamaterial (LHM) with asymmetric defects at microwave frequencies. The LHM is composed of the periodic arrays of hexagonal split ring resonators and wires, and the defects are introduced into the integrated LHM. It is shown with beam shifting experiment that the transmittance spectr…
Modification of chemical vapor deposition low- k films upon sequential exposure to helium plasma and then ammonia plasma is characterized using various methods. The He plasma emits extreme ultraviolet (EUV) photons creating O 2 vacancies, which impacts surface reactive sites and induces localized chemical modification…
Mixed rare-earth organophosphates have been investigated as potential corrosion inhibitors for AA2024-T3, and previously have shown synergistic inhibition behavior; however, the mechanism was not identified. In this paper, a key factor contributing to corrosion inhibition of AA2024-T3 with mischmetal diphenyl phosphat…
The metamaterial slab with low refractive index exhibits directive properties which make it suitable to work as antenna. The characteristics of such a device are affected under the presence of a conducting rod of arbitrary shape placed over the slab. A qualitative and quantitative approach is presented which is possib…
A novel Ru(II) organometallic catalyst with highly ordered cage-like mesoporous structure was prepared by coordinating the Ru(II) with the PPh2-ligand incorporated into the FDU-12 support (Ru–PPh2-FDU-12). During water-medium isomerization of 1-phenyl-3-buten-1-ol, the Ru–PPh2-FDU-12 exhibited almost the same activity…
ture cause the material to have good insulation properties and change the density of the material. A disorganised or less organised yarn surface gives dispersed light reflections, which in turn give a desirable matte appearance. The sponge-like structure is felt to be softer than the lean twisted ‘flat’ yarn, and the…
The electronic transitions for flavylium cations and quinonoidal bases of 17 substituted flavylium salts have been studied at semiempirical and DFT (density functional theory) levels. Solvent effect on electronic spectra was included by Polarizable Continuum Model, PCM. We assigned longest-wavelength absorption maxima…
Palladium nanoparticles of different sizes and shapes combined with polyaniline and derivatives of polyaniline can give rise to a host polymer with interesting physical properties and important potential applications. The resulting composite can be produced in the form of nanofibres, nanorods, thin films, etc. Potenti…
L'utilisation des fibres de chanvre dans une matrice cimentaire confère des propriétés intéressantes aux composites. La compréhension des mécanismes d'interactions entre les fibres et la matrice cimentaire est indispensable afin de mieux appréhender le comportement mécanique du composite. Les fibres de chanvre, par un…
A phase-field model of electrochemical interface dynamics is developed to study cathode shape and topology change in transport-limited electrolysis in two and three dimensions under conditions of rapid charge redistribution. A case study for the binary model is carried out for an Fe–FeO system. Stability behavior of t…
The mechanical properties of copper thin films formed by electroplating were compared with cold-rolled copper films using tensile test and nano-indentation. Both the Young's modulus and tensile strength of the films were found to vary drastically depending on the microstructure of the films. Though the Young's modulus…
Glass fiber reinforced polymers GFRPs are increasingly being applied as structural materials with their advantages of light weight and high strength in the fields of aerospace engineering and rapid transport engineering. To strengthen the GFRPs, sheet electron beam (EB) irradiation under low potential has been perform…
meso-Aryl-substituted subporphyrins bearing a 2-carboxyphenyl group were prepared and shown to form complementary face-to-face dimers upon azeotropic removal of methanol.
A technology for preventing capacity loss during charge–discharge cycling of a high-voltage hybrid electrochemical capacitor is presented. During high-voltage cycling of the capacitor, which combined the negative electrode of a lithium-ion battery with the positive electrode of an electric double-layer capacitor, extr…