Materials Literature
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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…
Polyaniline coated poly(butyl methacrylate) core–shell particles were synthesized and formulated into electrically conductive colloidal inks appropriate for use in roll-to-roll printing. Since the first demonstration of an organic field-effect transistor, a specific interest in fabricating low-cost, large area organic…
Microarray technology, like many other surface-capture diagnostic methods, relies on fidelity of affinity interactions between a surface-bound probe (e.g., nucleic acid or antibody) and its target in the sample milieu to produce an assay signal specific to analyte. These interfacial interactions produce the assay resu…
In the last three decades, extensive experimental studies have revealed numerable optical systems related to 3d transition metal (TM) ions in synthetic high-pressure, high-temperature (HPHT) and natural diamonds. Most of them were associated with nickel and cobalt and only a few are due to other TMs. A lot of structur…
The use of di-2-pyridyl ketone oxime (Hpko)/X- "blends" (X- = OH-, Cl-, ClO4-) in copper chemistry has yielded neutral binuclear and cationic trinuclear, pentanuclear or hexanuclear complexes. Various synthetic procedures have led to the synthesis of compounds [Cu5(pko)7].[ClO4]3.2CH3OH.2H2O (1), [Cu3(pko)3(OH)(Cl)]2[…
Use of a novel electrolyte, a spiro-type quaternary ammonium salt (SBP-BF4), in an electric double-layer capacitor (EDLC) has allowed the use of a linear-structure carbonate–which, although it has a low viscosity, had never been used as a solvent because it does not dissolve a conventional electrolyte–as a sub-solvent…
Photoinduced energy transfer and electron transfer processes have been found between the excited singlet state of Zn-porphyrin and C(60) via an oligothienylenevinylene bridge depending on the length of the oligothiophene and solvent polarity.