Materials Literature
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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.
New self-immolative dendritic molecules have been designed and synthesized. The dendrons are built with a multi-enzymatic triggering mechanism, which initiates their biodegradation through a self-immolative chain fragmentation to release a reporter group from the focal point. The dendritic backbone is constructed from…
Intrinsic diamond with a bandgap of 5.4 eV exhibits a surface conductivity (SC) of the order of 10 − 5 Ω − 1 when terminated by hydrogen. This conductivity is carried by a hole-accumulation layer close to the surface with an areal carrier concentration of about 10 13 cm − 2 , and it has already been utilized for a uni…
Objectives: To investigate the anticancer activities of a Chinese herb, Oldenlandia diffusa (Bai Hua She She Cao).Methods: The water extract of the raw herb Oldenlandia diffusa was used in this study. The in vitro anti-proliferative activities of the extract were tested against eight cancer cell lines and one normal c…
Microfibrillar reinforced composites (MFC) comprising an isotropic matrix from a lower melting polymer, i.e., low density polyethylene (LDPE), reinforced by microfibrils of a higher melting polymer, recycled from bottles, i.e., poly(ethylene terephthalate) (PET), were processed under industrially relevant conditions v…
A new synthetic method involving SNAr coupling of 4-fluoronitrobenzene to arylamines, followed by the reduction of the nitro groups, has been developed. Two types of aniline oligomers, namely Ph/NH2 and NH2/NH2 tetramers have been prepared by this method. Tetramers in the leucoemeraldine and in the emeraldine oxidatio…