Materials Literature
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We report on the synthesis of highly uniform, single phase zinc ferrite films prepared through a single step low temperature reaction by the liquid phase deposition (LPD) method. X-ray diffraction, TGA and EDX measurements support the assumption that the as-deposited films are constituted from a mixture of crystallize…
Micrometric ordered mesoporous silica spheres are synthesised by spray-drying alcoholic sols. For this synthetic route, the important effect of siloxane chemistry on both the morphological and the textural properties of spray-dried silica particles is demonstrated. This is achieved by correlating data obtained on the…
The synthesis and characterisation of [Ru(bipy)(2)(L1)](2+) and the homodinuclear complexes [M(bipy)(2)(L1)M(bipy)(2)](4+)(where M = Ru or Os), employing the ditopic ligand, 1,4-phenylene-bis(1-pyridin-2-ylimidazo[1,5-a]pyridine)(L1), are reported. The complexes are identified by elemental analysis, UV/Vis, emission,…
Mechanical and Electrical Properties of Solution-Processed Polyaniline/Multiwalled Carbon Nanotube Composite Films , Ramamurthy, Praveen C., Harrell, William R., Gregory, Richard V., Sadanadan, Bindu, Rao, Apparao M.
Abstract The structures of single crystals of the α -quartz homeotypes boron phosphate and boron arsenate prepared under high-pressure, high-temperature conditions in a belt-type apparatus were determined by X-ray diffraction. Both structures are more distorted with respect to the β -quartz structure type than α -quar…
Abstract Ionic strength and pH influence the adsorption of cations due to the variation of the electric charge in soils rich in iron (Fe) and aluminum (Al) oxides and hydroxides. The objective of this study was to investigate the influence of pH and ionic strength on zinc (Zn) sorption in a highly weathered Brazilian…
A simple sonication route to decorate multi-walled carbon nanotubes (MWCNTs) with crystalline tin nanoparticles is reported. The sonication process results in a uniform decoration of nanoparticles over the entire outer surface of the nanotubes. Acid-treated MWCNTs were exposed to ultrasonic radiation in a solution of…
A novel catalyst of silver nanoparticles over a zeolite film-coated copper grid (SZFC) has been fabricated via an in situ electrolytic method; it exhibited high catalytic activity and selectivity at a relatively low temperature for the partial oxidation of 1,2-propylene glycol to methyl glyoxal.
The formation of an endothelial cell (EC) monolayer is one critical factor in the development of a tissue engineered vascular graft. One potential method of endothelialization is the migration of native ECs from the surrounding blood vessel onto the newly implanted graft. In the present study, in vitro experiments wer…
Heck and Sonogashira cross-coupling reactions have been used for the functionalization of the upper rim of a tetraiodinated calix[4]arene. In this way, oligophenylenevinylene (OPV) and oligophenyleneethynylene (OPE) arrays have been constructed on the calix[4]arene core to produce covalent assemblies of four π-conjuga…
Composite acrylic pressure-sensitive adhesives (PSAs) were synthesized by emulsion polymerization in the presence of montmorillonite (MMT). An examination with X-ray diffraction (XRD) and transmission electron microscopy (TEM) showed that both intercalated and exfoliated structures of MMT coexisted in the composites.…
In situ laser-induced luminescence spectroscopy is used to study the visible luminescent characteristics of ZnO during the preparation process of ZnO supported on SiO2 by the pyrolysis of different Zn precursors in N2 or O2 atmosphere. The excitation source is 325 nm light, which is above the band gap (3.37 eV) of ZnO…
A novel bis scaffold containing a pentapeptide PHGGG, derived from the prion octarepeat, forms fibrils of nanometric dimensions, thus indicating that certain segments in the unstructured region of the prion protein may facilitate an initial fibrillation event.
Luminescent lanthanide complexes of europium and terbium grafted on amino-functionalised silica particles can easily be discriminated from conventional fluorescent markers such as fluorescein thanks to a new and simple time-resolved luminescence microscopy set-up.
The temperature-dependent physical properties of four related liquid crystalline materials are reported. The materials differ chemically only in the degree of fluorination of one of the core aromatic rings and all materials exhibit both chiral smectic-C (ferroelectric) and antiferroelectric liquid crystal phases. The…
The peroxo-heteropoly compound {HPO4[W(O)(O2)2]2} was synthesized on the surface of HMS by reacting HMS-PrNH(PO3H2) with [W2O3(O2)4(H2O)2]2− solution, and then palladium ions were exchanged into the channels of HMS to form a hybrid catalyst. The novel solid catalyst showed 34.1% propylene conversion and 83.2% selectiv…
Considerable effort has been spent to incorporate carbon nanotubes into polymer matrices to exploit their extraordinary modulus and resistance to brittle failure. However, when as-synthesized nanotubes are used, the composites often fail through nanotube pullout due to poor adhesion between the nanotube and polymer ma…
A high temperature approach has been utilized for the mass production of ultra-long, straight silica nanotubes and indium sulfide filled cable-like structures by heating of an Si wafer and In2S3 powder under a stream of hydrogen/argon gases at 950 °C. Transmission electron microscopy, scanning electron microscopy and…
A series of new derivatives of the di(2-pyridyl)amine ligand has been prepared, having the general formula (py)2NR, where R is one of a wide range of groups including naphthyl, pyrenyl, benzo-18-crown-6, pyrenyl, oxazolyl and bromo-biphenyl. All ligands are luminescent, with emission maxima between 370 and 520 nm, and…
This work focuses on the study of the mechanical properties and microstructure of plates of thin wall ductile iron, cast in sand moulds of vertical and horizontal configuration. All tests were carried out on ferritised samples. Melts of carbon equivalent values ranging from 4.06 to 4.85 were used to cast plates of thi…