Materials Literature
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Supersonic He and Ar atomic beam scattering from C(60) and graphene monolayers adsorbed on a Pt(111) surface are demonstrated in order to obtain detailed insight into a gas-molecule collision that has not been studied in detail so far. The effective masses and phonon spectral densities of the monolayers seen by differ…
The problem of supercurrent in superconducting graphene is revisited and the supercurrent is calculated within the mean-field model employing the two-component wave functions on a honeycomb lattice with pairing between different valleys in the Brillouin zone. We show that the supercurrent within the linear approximati…
Purpose The purpose of this paper is to present a methodology of identification and calculating vibrations of power transformers caused by magnetostriction. Design/methodology/approach All calculations are based on finite element approach. Electromagnetic model uses 2D time stepping solution in nonlinear continuum of…
The optical properties of slab waveguides made of indefinite permittivity ($\ensuremath{\varepsilon}$) materials (IEMs) are considered. In this medium, the real part of the transverse permittivity is negative while that of the longitudinal permittivity is positive. At any given frequency, the IEM waveguide supports an…
Copper nanoparticle was synthesized in the presence of heptadecafluorononanoic acid by the conventional solution immersion method at room temperature from the copper plate, as a resource material. The bulk etching rate was calculated by the weight loss method. The pale green colored Cu-HDFN was characterized by Fourie…
The effect of electron beam dose on the mechanical, thermal, and electrical properties over ethylene methylacrylate (EMA) copolymer was investigated. The copolymer (Elvaloy 1224) was subjected to electron beam radiation at different doses for cross-linking, with the incorporation of the sensitizer trimethylolpropane t…
We study hot electron transport in short-channel suspended multilayer graphene devices created by a distinct experimental approach. For devices with semitransparent contact barriers, a dip of differential conductance $(dI/dV)$ has been observed at source-drain bias ${V}_{d}=0$, along with anomalies at higher ${V}_{d}$…
Abstract The aim of this study was to tailor the surface properties of cellulose acetate membranes using low‐pressure plasma processing. Argon (Ar) plasma and Difluoromethane (CH 2 F 2 ) plasma were used to control the surface wettabilities of cellulose acetate membranes. Optical emission spectroscopy was used to exam…
Electrical-resistivity and magnetic-susceptibility measurements under hydrostatic pressure up to $p\ensuremath{\approx}2.75\text{ }\text{GPa}$ have been performed on superconducting (SC) LiFeP. A broad SC region exists in the temperature-pressure $(T\text{\ensuremath{-}}p)$ phase diagram. No indications for a spin-den…
Recent applications of infrared (IR) spectroscopy in research of clays and clay minerals are reviewed. After a brief description of the structures of clay minerals and basic principles of IR spectroscopy, the selected most interesting papers published in this area in 2007–2009 are discussed. The potential of both midd…
We report the electrical properties of single-walled carbon nanotube bundles aligned between two electrodes with a gap of 8 µm by the alternating current dielectrophoresis method. The resistance increased exponentially as the number of structural defects increased from the oxygen plasma treatment. However, no noticeab…
Unsaturated polyesters are important matrix resins used for glass fiber reinforced composites/plastics. The strength of fiber glass reinforced polyester composite is mainly related to the glass content of the material and the arrangement of glass fibers. In general, the higher the weight percent glass in the composite…
The diffusion of an interstitial Si atom along an edge dislocation in Al is studied by using a quantum-mechanics/molecular-mechanics coupling method. It is found that the diffusing Si atom follows approximately a sinusoidal trajectory. The diffusion energy barrier along the partial dislocation core is in excellent agr…
Abstract An optically active metal‐free porphyrin ( 1 ) with four chiral binaphthyl units attached at the meso ‐phenyl substituents through crown ether moieties has been designed, synthesized, and characterized. Its self‐assembly behavior in the absence and presence of K + was comparatively investigated by electronic…
Abstract Waterborne poly(styrene‐ co ‐butyl acrylate) was prepared via miniemulsion polymerization in which nanoclay (Cloisite® 30B, modified natural MMT) in different concentrations was encapsulated. Scanning electron microscopy, X‐ray diffraction, and transmission electron microscopy confirmed the encapsulation and…
An alternative method is presented for fabricating an antireflective nanostructure array using nanosilver colloidal lithography. Spin coating was used to produce the multilayered silver nanoparticles, which grew by self-assembly and were transformed into randomly distributed nanosilver islands through the thermodynami…
Abstract The vibrational behaviour of complexes of general formula [(ML 5 CN) 2 M′L′ 4 ] with either a cis or trans geometry has been studied. The ν(CN) modes have been assigned on the basis of both infrared and Raman intensities. The CN vibrators are but weakly coupled, particularly so in the cis arrangement. The spe…
Two new boron-based conjugated compounds 1 and 2 containing one and three monopyrrolo-annelated tetrathiafulvalene (TTF) unit(s) were synthesized and characterized. They exhibit typical ICT absorptions which can be modulated after addition of fluoride ion. In addition, the oxidation potentials of 1 and 2 are shifted t…
We determine the statistics of the local tube width in F-actin solutions, beyond the usually reported mean value. Our experimental observations are explained by a segment fluid theory based on the binary collision approximation. In this systematic generalization of the standard mean-field approach, effective polymer s…
The redox switching kinetics, that is, charge transfer and transport in layer-by-layer-deposited electroactive polyelectrolyte multilayers is systematically studied with variable-scan-rate cyclic voltammetry. The experiments are performed with films finished in the redox polycation (an osmium pyridine-bipyridine deriv…