Materials Literature
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In recent years, there has been a resurgence of interest in transparent ferroelectric glass-ceramics (TFGCs), which are a special class of glass-ceramic composites that combine the low cost of fabrication and forming of transparent glass with the superior nonlinear optical and electro-optical properties of ferroelectr…
Pioneers in the field of small diameter graft development sought to promote graft endothelialization and, thereby, increase patency by transplanting a varying degree of autologous endothelial cells onto vascular grafts prior to implantation. This process has become known as endothelial cell seeding. The underlying hyp…
The first examples of luminescent lanthanide complexes with an o-nitrobenzoic acid-based ligand, 2-nitro-4-thiophen-3-yl benzoic acid, have been isolated. The structural and preliminary photophysical characterization is presented.
The variable temperature magnetic susceptibility, X-ray crystallography, and IR and Raman spectra of a new dinuclear complex [{Fe(II)(NCBH(3))(4-phpy)}(2) mu-bpypz)(2)] demonstrated the first two-step spin-crossover associated with a 1 : 1 mixture of high-spin pair [HS-HS] and low-spin pair [LS-LS] at the plateau.
Novel colloidosome microcapsules with aqueous gel cores and integral shells of polymeric colloid particles have been prepared and characterized. Our method is based on templating water-in-oil emulsions stabilized by polystyrene (PS) latex particles, followed by gelling of the aqueous phase with a suitable hydrocolloid…
A macrohomogeneous model is presented for a porous electrode that includes coupled potential and concentration gradients with linear kinetics. The equations are solved to obtain an analytical expression for the impedance of a porous electrode. Complex plane plots are presented that illustrate two well-defined arcs: a…
Anchorage of PdII ions into mesoporous ion-exchange resins functionalized with sulfonic groups is highly effective for the direct synthesis of hydrogen peroxide using methanol as a solvent at 313 K. The high performance of these catalytic systems is due to the ability of sulfonic acid groups of the resin to interact a…
Preparation of hybrid organic-inorganic MCM-41 and SBA-15 silicas functionalized with perfluoroalkylsulfonic acid groups has been achieved in a single step by reacting the mesoporous silicas with 1,2,2-trifluoro-2-hydroxy-1-trifluoromethylethane sulfonic acid beta-sultone; the catalysts showed higher activity than com…
Thin films of thermochromic tungsten doped VO2 on glass substrates were prepared from the atmospheric pressure chemical vapour deposition (APCVD) reaction of VOCl3,·H2O and WCl6. X-Ray diffraction (XRD) and Raman spectroscopy indicated a solid solution V1−xWxO2 (x = 0.003–0.032). XPS studies indicated the tungsten was…
Hydrophobic coatings have been applied to various industrial items. However, their expected properties cannot always be obtained for practical use by merely decreasing their surface energies. Various cases require precise design and control of a coating's structure and chemical composition. This paper briefly reviews…
Polypropylene-SiO2 nanocomposites were synthesized using twin-screw extruders. The properties of the nanocomposites were studied using two different inorganic fillers: colloidal (sol) and powder silica nanoparticles. Reinforcing and toughening effects of the nanoparticles on the polymer matrix were found at a loading…
A series of cobalt-free and low cost perovskite oxygen permeable membranes based on BaCe(x)Fe(1-x)O(3-delta)(BCF) oxides was successfully synthesized and the membrane showed both high oxygen permeability and high stability under reductive atmosphere, which will be most suitable for constructing a membrane reactor for…
Electrolytes play an important role in determining the performance of conducting polymer electrochromic devices. Good electrolytes should have high conductivity, large electrochemical windows, excellent thermal and chemical stability, and negligible evaporation. Room-temperature ionic liquids are ideal electrolytes to…
Highly selective epoxidation (>95%) of unfunctionalized alkenes was performed by tetrabutylammonium periodate in the presence of six different phenyl substituted manganese(III) meso-tetraphenylporphyrins [Mn(Por)] and imidazole in CH2Cl2. Electron-withdrawing and bulky substituents on the phenyl groups lowered the cat…
A fascinating nanoobject, amphiphilic polymer brushes with a hard core of multi-walled carbon nanotubes (MWNTs) and a relatively soft shell of polystyrene-block-poly(acrylic acid) (PS-b-PAA), was easily constructed by in situ atom transfer radical polymerization (ATRP) of styrene followed by tert-butyl acrylate on the…
We report atomic level high resolution transmission electron microscopy (HRTEM), electron nanodiffraction and nano-electron energy loss spectroscopy (nano-EELS) of boron-doped carbon nanostructures obtained by laser ablation of Co/Ni/B-doped carbon targets. The observations provide direct evidence for structural syste…
We present studies of the optical properties of the new nonlinear material BiB3O6 for second harmonic generation from the visible to infrared. We have determined the phase-matching conditions and effective nonlinear coefficients in the three principal optical planes, acceptance bandwidths, spatial and temporal walkoff…
In this review we describe and discuss recent results on the linear dielectric response of high-permittivity dielectric crystals and ceramics in the wide frequency range 102–1014Hz. Our attention is paid to materials which exhibit some interesting low-frequency polar-phonon anomalies in combination with some additiona…
The corrosion behavior of a Mg-based alloy, WE43, ac/dc anodized using a waveform involving a final period of current decay in an alkaline silicate solution, has been investigated using electrochemical impedance spectroscopy during exposure to a 0.86 M NaCl solution. The change of the oxide film morphology with immers…
Abstract The macroscopic electrooptic activity of organic materials depends upon the molecular hyperpolarizability, beta, of individual organic chromophores and upon the product of number density, N , and noncentrosymmetric order, <cos 3 theta>, of the chromophores in a hardened polymer lattice. Quantum…