Materials Literature
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We propose that one of the best grounds for the materials design from the viewpoint of {\it electron correlation} such as ferromagnetism, superconductivity is the atomically controlled nanostructures and heterointerfaces, as theoretically demonstrated here from three examples with first-principles calculations: (i) Ba…
Using muon spin spectroscopy we have found that, for both ${\mathrm{N}\mathrm{a}}_{x}{\mathrm{C}\mathrm{o}\mathrm{O}}_{2}$ ($0.6\ensuremath{\le}x\ensuremath{\le}0.9$) and three- and four-layer cobaltites, a common low temperature magnetic state (which in some cases is manifest as an incommensurate spin density wave) f…
Recently, an environmental criteria was required for every product and process. The great amount of pollution caused by the paper and cellulose industry effluents, especially those produced from nonwood fibrous materials, e.g., rice straw and bagasse. Using new technologies or redesigning products to meet new environm…
The rotation-inversion controversy for the photoisomerization mechanism of azobenzene has been addressed on the basis of the CASSCF calculations for the excited-state relaxed surface scan along the CNN bending (inversion), the CNNC torsion (rotation), and the concerted CNN bending (concerted inversion) reaction pathwa…
We have used transistor devices with carbon nanotubes as the conducting channel to explore the interaction between the nanotube surface and streptavidin, both in dry and in buffer environments. We find charge transfer between the protein and the nanotubes in both cases. Comparison with simpler molecules allows the est…
A derivatized porphyrin with long alkyl chains, 5,10,15,20-tetrakis(hexadecyloxyphenyl)-21H,23H-porphine, is selective toward semiconducting single-walled carbon nanotubes (SWNTs) in presumably noncovalent interactions, resulting in significantly enriched semiconducting SWNTs in the solubilized sample and predominantl…
A metallic planar particle, that will be called spiral resonator (SR), is introduced as a useful artificial atom for artificial magnetic media design and fabrication. A simple theoretical model which provides the most relevant properties and parameters of the SR is presented. The model is validated by both electromagn…
Thin film mechanical behavior and stress presents a technological challenge for materials scientists, physicists and engineers. This book provides a comprehensive coverage of the major issues and topics dealing with stress, defect formation, surface evolution and allied effects in thin film materials. Physical phenome…
Nanostructured materials gained great importance in the past decade, owing to their wide range of potential applications in many areas, e.g. mechanical, structura l, sensor devices, biomedical, electronics. A large interest is involved with carbon nanotubes, which can be used as a main constituent of composite materia…
Depending on types of yarn and technology used, there are numerous process points and quality characterisics to be controlled by sampling process control in the textile yarn industry. In all of these control stages, sampling interval may change drastically, say, from the quarter hour to 10,000 h. Therefore, determinin…
A hexagonal columnar crystal undergoes a shear-melting transition above a critical shear rate or stress. We combine the analysis of the shear-thinning regime below the melting with that of synchrotron x-ray scattering data under shear and propose the melting to be due to a proliferation of dislocations, whose density…
Injectable thermoplastic oligomers represent a promising biomaterial for drug delivery provided they possess a melting point at or very near physiologic temperature, as well as a low melt viscosity. One approach would be to prepare an oligolactone. In this paper, we examine the role of different alcohol initiators use…
A simple evaporation-condensation method was used to investigate self-assembled CdS nanorods with different geometrical configurations. At the evaporation temperature of 800 °C, the growth of branched CdS structures with multi nanorod arms along the [0001] direction was observed. However, at 1000 °C, dendritic arrays…
The purpose of this work is to improve the epoxidation of a long-chain olefin. The conversion and yield from the epoxidation of 1,7-octadiene is greatly enhanced by using a new cocatalyst in the presence of hydrogen peroxide in an organic solvent/aqueous solution two-phase medium. An active intermediate of the catalys…
By molecular modeling simulations, we study the dynamics of the rise of a meniscus on the outside of a fiber. We develop methods to measure simultaneously the height of the liquid interface and the contact angle versus time. We observe that in the complete wetting case (with an equilibrium contact angle equal to zero)…
The behavior of Ba and Ti sources in the reaction mixture during the formation of crystalline barium titanate (BaTiO 3 ) powders from titanium isopropyl alkoxide (TIP)/acetic acid/barium acetate/KOH solutions has been investigated. From Fourier transform infrared (FT-IR) analysis, it was found that two acetate groups…
Equal channel angular pressing is an innovative process for obtaining severe plastic deformations in materials. A modified configuration of the one proposed by Segal et al in 1986 is analysed in this work by the upper bound method. This new configuration is called equal fillet radii angular pressing. With this die con…
Silica xerogels synthesized by the sol−gel process were used as templates to fabricate mesoporous carbons. The silica was prepared in a two-step process, under acid pH conditions, at a high H 2 O/Si molar ratio of 194 and at different HCl/Si molar ratios. Two sources were used as silica precursors: tetraethoxysilane (…
This letter reports on a simulation of the nanoscale self-assembly process of a two-phase monolayer on an elastic substrate. Two competing actions determine the phase sizes and their spatial ordering. The phase boundary energy tends to coarsen the phases, while the concentration-dependent surface stress tends to refin…
To understand the connection between the conformation of a protein molecule and the oxidation of its methionine residues, we measured the rates of oxidation of methionine residues by H(2)O(2) in granulocyte colony-stimulating factor (G-CSF) as a function of pH and also studied the structural properties of this protein…