Materials Literature
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A series of sandwich-shaped complexes based on two square tetranuclear Ag(I) metallomacrocycles, [[Ag4(pprd)4]2(XF6)]-(BF4)6.8MeNO2 (pprd = 4-(2-pyridyl)pyrimidine; X = Si, Ge and Sn), in which a XF6(2-) anion is encapsulated, were prepared and their structures were characterized both in the solid state and solution.
The electric double-layer capacitances at carbon electrodes with different surface morphologies have been determined in organic solution and polymeric gel electrolytes by an ac impedance method. The capacitance depended not only on the surface structure but also on the electrolyte composition. Activated carbon fiber w…
Surface-modified gold nanoparticles have pronounced benefits in the biomedical field due to their significant interaction with delivery materials. In the present study we used hydrophobically-modified polycations (i.e., N-acylated chitosan) to stabilize gold nanoparticles. Aliphatic hydrophobic groups, having carbon c…
The reaction kinetics of the chemical polymerization of aniline in aqueous acid solutions with FeCl3 as the oxidant (initiator) was investigated at 25?C. The polymerization was performed in a special reactor which enabled the initial concentration of oxidant to be kept constant during the polymerization reaction. The…
The anodic behavior of highly doped in aqueous was investigated. Electrodes anodized in the absence of light in 2– at a constant potential of 0.5– (SCE), or subjected to linear potential sweeps to potentials in this range, were shown to exhibit the formation of a nanoporous subsurface region. Both linear sweep voltamm…
Using the Bloch modes of a periodic, semi-infinite array of slits in a metallic host, we study the transmission of obliquely incident plane-waves through sub-wavelength slits. Matching the tangential E- and H-fields at the entrance facet of the periodic structure yields the complex amplitudes of the various Bloch mode…
This paper studied the thermal-induced phase separation (TIPS) phenomenon via spinodal decomposition (SD) in a polymer solution under a linear concentration gradient. The one-dimensional model consists of the Cahn–Hilliard theory for SD and incorporates the Flory–Huggins free energy equation, the slow mode mobility th…
Hybrid catalytic membrane systems have been produced by modifying porous ceramic membranes with metal oxide films. A two-layer cermet membrane consisting of a flexible stainless steel layer and an overlying porous TiO 2 ceramic layer and a ceramic titanium carbide membrane are examined. The membrane surfaces have been…
Scatterometry takes advantage of the sensitivity exhibited by optical diffraction from periodic structures, and hence is an efficient technique for lithographic process monitoring. A feature region measurement algorithm has been developed to extract accurately and quickly the relevant constitutive parameters from diff…
Two novel co-polymers based on omega-pentadecalactone were enzymatically synthesized by a combination of ring-opening polymerization and polycondensation. Modified literature procedures enabled the production of the semi-crystalline materials with suitable molecular weights and melting characteristics. Microspheres we…
The synthesis and photophysical properties of a new terpyridine-based europium(III) chelate (Eu (TMT)-AP3) designed for peptide and protein labelling in aqueous solution phase is described. In order to obtain a stable, easy to handle, versatile and efficient labelling agent, a reactive aminopropargyl arm has been intr…
A series of polyurethaneurea (PUU) aqueous dispersions, which were stable at ambient temperature for more than 1 year, were prepared with C 36 ‐dimer‐fatty‐acid‐based polyester polyol, isophorone diisocyanate, dimethylol propionic acid, and ethylenediamine. The particle size of all these PUU (DPU) aqueous dispersions…
A Schiff base monomer was synthesized by the condensation reaction between salicylaldehyde and ethylenediamine. The Schiff base polymer, with a double azomethine group, was prepared by oxidative polycondensation (OP) reaction of monomer in aqueous alkaline medium with NaOCl as an oxidant at 90°C. The monomer and polym…
Wettability and penetration kinetics of liquid into porous material were studied by the capillary rise method. The mass gain of the penetrating liquid in a tube filled with glass beads was measured vs. time. Two types of glass beads surfaces: unmodified (smooth), modified (rough), were used to investigate the influenc…
Equal-channel angular pressing (ECAP) is one of the most efficient techniques of severe plastic deformation for the production of bulk ultrafine-grained metals. During the last decade the intensive developments of ECAP have been associated with numerous modifications of the die-set design as well as establishing new p…
Using a first-principles total energy method based on density functional theory within local density approximation, we have performed a first-principles computational tensile test (FPCTT) on an Al grain boundary. The theoretical tensile strength of the Al grain boundary is calculated to be 9.5 GPa at the strain of 16%…
Hexagonal columnar liquid-crystalline phases are induced for a new fan-shaped spiropyran compound as the result of an acidichromism effect of spiro-merocyanine isomerisation through protonation upon incorporation of 4-methylbenzenesulfonic acid.
We present a study of antireflective schemes and their operation over a full day. We compare simulation results for single and double layer antireflective coatings with bio-mimetic moth-eye structures, taking into account the full range of wavelengths and incident angles experienced by fixed solar cells from sunrise t…
Hydrogen peroxide was electrogenerated in-situ in aqueous bicarbonate solutions for the epoxidation of alkenes using Mn2+ as the catalyst. Water-soluble alkenes were epoxidized with excellent yields and high current efficiencies. The catalytic system could be adapted for the epoxidation of lipophilic alkenes in tert-b…
A series of uni-axial tensile cycling tests were conducted at room temperature in superelastic NiTi strip specimens with nano-grain size. The NiTi superelastic strip specimen’s Apparent Young’s Modulus (AYM) and the critical stress decrease when the specimen is subjected to an external uni-axial stress and the strain…