Materials Literature
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Porous dielectric thin films, composed of isolated helical columns, are fabricated by the glancing angle deposition technique. The selective reflection of circularly polarized light and the optical rotation of linearly polarized light are investigated as a function of film material and helical morphology. The stronges…
The structure and magnetic properties of a dodecanuclear iron(III) wheel are reported, featuring a bridging zwitterionic ligand.
We report a direct salt-conversion approach for large-scale synthesis of carbon-encapsulated magnetic Fe and Fe3C nanoparticles.
The present paper presents a proceeding to prepare partially conductive textile structures as basic substrates to integrate sensors and microelectronic devices into textiles. The proceeding is based on two steps. The first is to create a textile prestructure by conventional textile technologies, such as Jacquard weavi…
The multifield statistical approach for the description of collective properties of mesodefect ensembles is developed to allow the determination of the specific nonlinear form of the evolution equation for the macroscopic tensor parameter of defect density. Characteristic self-similar solutions of this equation are fo…
Abstract The intensification of wet textile processes, such as cleaning and dyeing, by application of ultrasound is well known. In these processes, mass transfer in the interyarn and intrayarn pores of the textile is the basic physical phenomenon. The results of experiments on textile cleaning, based on basic principl…
Electron energy loss spectroscopy was used to investigate the bonding of plasma deposited carbon films. The experimental conditions include the use of a specific collection angle for which the shape of the spectra is free of the orientation dependency usually encountered in graphite due to its anisotropic structure. T…
The perfectly matched layer (PML) absorbing boundary condition is shown to be analytically unstable for a material with a bandwidth of negative refractive index. Physically, this is a consequence of the reversed phase and group velocities in such a medium. The instability is inherent in the PML and is not implementati…
The thermophysical properties of mixtures of hexanethiolate-capped gold nanoparticles and three types of discotic liquid crystals, investigated using polarizing optical microscopy, differential scanning calorimetry and DC conductivity, indicate inclusion of gold nanoparticles into a matrix of triphenylene-based discot…
The protective capacity of solution-cast polyaniline coating systems toward mild steel has been investigated via simple electrochemical polarization techniques. Coatings containing a polyaniline-emeraldine salt species were found to significantly reduce corrosion rates in 0.1 mol dm −3 NaCl and 0.1 mol dm −3 HCl. The…
Abstract Organic solids and polymers that absorb in the near-infrared (NIR) region (1000–2000 nm) represent a class of emerging materials and show a great potential for use in photonics and telecommunications. The radical anions of stacked aromatic imides, fused phorphyrin arrays, polythiophenes, sandwich-type lanthan…
The mechanism for filiform corrosion (FFC) is thought to involve oxygen diffusion through the tail to the active head. The primary cathodic region is near the back of the head (at the head/tail boundary), where oxygen concentration is higher, and the primary anodic region is at the front edge of the head of the filame…
Dinuclear [(NiL)Gd(hfac)(2)(EtOH)](H(3)L = 1,1,1-tris(N-salicylideneaminomethyl)ethane, Hhfac = hexafluoroacetylacetone), trinuclear [(NiL)(2)Gd(NO(3))], and tetranuclear [(NiL)Gd(CH(3)CO(2))(2)(MeOH)](2) complexes, were prepared by treating [Ni(HL)] with [Gd(hfac)(3)(H(2)O)(2)], Gd(NO(3))(3).6H(2)O, and Gd(CH(3)CO(2)…
A simple geometry optical sensor based on porous silicon technology is theoretically and experimentally studied. We expose some porous silicon optical microcavities with different porous structures to several substances of environmental interest: Very large red shifts in the single transmission peak in the reflectivit…
OBJECT: Interest has developed in the use of magnesium (Mg++) as a neuroprotectant and antivasospastic agent. Magnesium may increase cerebral blood flow (CBF) and reduce the contraction of cerebral arteries caused by various stimuli. In this study the authors tested the hypothesis that a continuous intravenous infusio…
Modifications of the passive film formed on 316L stainless steel (SS) in acidic media were performed under dc or ac polarization. The effects of these ageing treatments on the chemical composition and the electronic structure of the passive film were studied. Chemical analysis with angle resolved X-ray photoelectron s…
Well ordered cubic (MCM-48) mesoporous silica and aluminosilica materials were assembled from zeolite seeds (ZSM-5, Beta or silicalite-1) via a two-step crystallization process and their hydrothermal stability in steam and boiling water was investigated using a variety of techniques including powder XRD, nitrogen sorp…
Nanostructured manganese dioxide ( MnO 2 ) was potentiodynamically deposited on polyaniline (PANI) matrix at a scan rate of 200 mV s − 1 . The composite electrode of PANI and MnO 2 ( PANI MnO 2 ) was characterized in 0.1 M Na 2 SO 4 for electrochemical supercapacitors. Optimization of thickness of the PANI film and…
We report a simple and general noncovalent method for attaching ZnO and MgO nanoparticles onto MWNTs using water-in-oil microemulsions, which is important for preserving the mechanical and electrical properties of carbon nanotubes.
A significant enhancement of the gold catalysis stability against sintering has been achieved using brookite as a catalytic support.