Materials Literature
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The successful incorporation of an organic chromophore with highly polarizable lead iodide chains in an organic–inorganic hybrid is revealed in this communication. The synthesis, structure, and preliminary studies of the linear and nonlinear optical (NLO) properties of the compound are divulged. The synergism exhibite…
Quantum-chemical calculations, incorporating both electron–phonon and electron–electron effects, are performed on two-chain model aggregates to assess the influence of interchain interactions on the nature of the singly charged species (polarons) in organic conjugated polymers. In symmetric cofacial dimers with fixed…
We have explored magnetic properties and structural characteristics of Fe/Pt multilayers after annealing at various temperatures in order to clarify the growth process of the ordered Fe–Pt phase in the Fe/Pt multilayer structures. It is found that rapid diffusion at Fe/Pt interface occurs at temperatures 275–325 °C an…
A series of mercaptopropyl-functionalized wormhole mesostructures, denoted MP-HMS, have been prepared through the S 0 I 0 assembly of alkylamine surfactants (S 0 ) and mixtures of 3-mercaptopropyltrimethoxysilane and tetraethyl orthosilicate as framework precursors (I 0 ). Unprecedented levels of organo functionalizat…
coated with 2-carboxyterthiophene (TTP-COOH) self-assemble through π-π interactions to form uniform transparent microspheres. The interaction between individual particles is relatively weak and the spherical aggregates can be destroyed by sonication to leave the monodispersed nanoparticles.
The disposal of fission products and actinides generated by the nuclear-fuel cycle is one of the major challenges in Environ-mental Sciences of the 21st Century. Because some fission products (e.g., 99Tc, 129I, 79Se and 135Cs) and actinides (e.g., 239Pu and 237Np) are long-lived, they have a major impact on the risk a…
Growing carbon nanotubes (CNTs) by arcing from graphite electrodes does not demand a noble gas atmosphere: water will do! CO and H2 bubbles generated by reaction of C vapor with water provide a quasi-inert atmosphere in which multiwalled carbon nanotubes grow from the cathode. Using cobalt salt solutions instead of pl…
A unique nanoporous sol-gel glass possessing a highly ordered porous structure (with a pore size of 153 A in diameter) was examined for use as a support material for enzyme immobilization. A model enzyme, alpha-chymotrypsin, was efficiently bound onto the glass via a bifunctional ligand, trimethoxysilylpropanal, with…
On pyrrole! The pyrrole-based corrole ligands can offer an alternative to porphyrin systems. The manganese corroles 1-4 are readily synthesized, undergo metal- not ligand-based redox chemistry, and 4 in particular shows impressive catalytic activity in the oxygenation of styrene with iodosylbenzene.
In this work Ag underlayers, with a slightly larger unit cell than FePt, were found not only to induce epitaxial growth of the FePt films but also to reduce the FePt ordering temperature. Without using the Ag underlayer, the FePt film deposited onto the Si substrate was fcc disordered. By the use of the Ag underlayer,…
Detection of explosives has the flavor of those mathematical problems that are not invertible. It is easier to hide explosives than to find them. Many approaches have been proposed and executed for the remote detection of explosives, contraband materials, weapons of mass destruction, currency, etc. Most detection tech…
This papers shows the evaluation process of the durability of compressed soil-cement bricks. A great number of tests were made to determine the behavior of bricks when they are compression loaded and under the influence of moisture. Two different types of soils were used to produce the bricks, a lime-clay soil and a s…
This paper presents a study into the architecture and construction of the 18th Century Civil Palaces located in Gravina street (Provincial Museum of Fine Arts of Alicante), the building stones used and the mineral related decay processes that these materials have suffered. The original building stones and other stones…
Eight commercial foods representing a wide range of viscosities (i.e. honey, condensed milk, mayonnaise, tomato ketchup, cream cheese, yogurt, process and Mozzarella cheeses) were investigated. Their steady shear viscosity and dynamic complex viscosity were determined by rheological measurements at two temperatures us…
A simple, economical and practical impact resistance test method has been developed for high strength fiber reinforced concrete (HSFRC). The results indicated that there is a logarithmic relation between flexural toughness energy (EFT) and impact energy (El) for FRC In this study, three different aspect ratios of hook…
Large amplitude oscillatory shear (LAOS) was applied to a linear polymer melt in order to study the mechanical harmonic generation in the nonlinear regime. In the nonlinear regime mechanical harmonics at 3w1, 5w1, etc. are generated under oscillatory shear with a shear frequency w1. These higher harmonics can be analy…