Materials Literature
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In a search for sharp features in the electronic density of states (DOS) of quasicrystals, a systematic comparative study of the DOS in the vicinity of Fermi energy ${E}_{F}$ was performed in icosahedral ${\mathrm{Al}}_{72.4}{\mathrm{Pd}}_{20.5}{\mathrm{Mn}}_{7.1},$ ${\mathrm{Al}}_{62}{\mathrm{Cu}}_{25.5}{\mathrm{Fe}}…
In Ni 2+ x Mn 1− x Ga shape-memory ferromagnetic alloys with coincident magnetic and structural phase transitions, a reversible structural field-induced phase transition was observed at constant temperature and pressure in magnetic fields of about 10 T. Computational results are in qualitative agreement with experimen…
We prepared five mutant lysozymes in which glycines whose dihedral angles are located in the region of the left-handed helix, Gly49, Gly67, Gly71, Gly102 and Gly117, were mutated to an alanine residue. From analyses of their thermal stabilities using differential scanning calorimetry, most of them were more destabiliz…
A new Monte Carlo simulation method designed for polymer solutions confined to planar slits is presented. The slit is in equilibrium with a surrounding bulk solution and the method allows a variation of the slit width while maintaining the polymer chemical potential constant. This is achieved by changing the tangentia…
The frequency dependent viscoelastic properties and lamellar spacing of three symmetric styrene−isoprene (PS−PI) diblock copolymers are compared to those of their hetero-four-arm star counterparts. The PS and PI arm molecular weights of the three linear and three star samples are 10, 20, and 60 kg/mol, respectively. A…
The phase behavior of model colloidal systems containing platelets and polymer is investigated using computer simulation and perturbation theory. For polymer coils with a diameter sigma(P) larger than 0.3sigma(D), where sigma(D) is the diameter of the platelets, isotropic fluid-fluid coexistence is observed, in additi…
It is pointed out theoretically that the ordered morphology in the binary mixtures of A−B type diblock copolymers, ((A−B) 1 /(A−B) 2 ), depends not only on the compositions of block copolymers (i.e., the volume fraction of the A block, f A1, f A2 ) but also on the relative chain-length differences of the constituent c…
Diffraction profiles were analysed from thermally deposited 111-oriented gold films, ranging in thickness from 300 to 1900 Å. The data were collected using the high-resolution powder diffractometer on beamline BM16 at the European Synchrotron Research Facility (ESRF) set at a wavelength of 0.3507 Å. The profiles were…
A comprehensive study of morphological and topographical changes in low tempera ture plasma treated flax fibers is reported. Time-series images of fiber surface appearance are examined by environmental scanning electron microscopy (ESEM). As the exposure time increases, the depth of the micropores etched by the plasma…
Porphyrin aggregation is a field of wide interest owing to the possible technological and biomedical applications. Under these premises, the possibility of tuning and driving the assembly processes turns out to have a central role in achieving specific structures and, therefore, functions. Recently, we have demonstrat…
Vanadium oxide nanotubes (VOx-NTs) are easily accessible in pure form from vanadium(V) alkoxides and amines by a sol-gel reaction and a subsequent hydrothermal treatment. The wall structure of VOx-NTs containing hexadecylamine or dodecylamine as the structure-directing template has been characterised by transmission e…
Regioselective synthesis using protecting-group strategy yields azulene-cellulose conjugates 6-(azulene-2-carboxylate)-2,3-di-O-methyl cellulose AzC-1, 6-(4-azulene-1-yl-benzoate)-2,3-di-O-methyl cellulose AzC-2, and 6-(azulene-1-carboxylate)-2,3-di-O-methyl cellulose AzC-3. The spectral and electrochemical properties…
The generation of magic number silica clusters [(SiO 2 ) n O 2 H 3 ] - with n = 4 and 8 by XeCl laser (308 nm) ablation of porous siliceous materials is reported. The production of magic cluster [(SiO 2 ) 4 O 2 H 3 ] - can be enhanced by sample selection and experimental optimization so that it becomes the most promin…
Abstract The microstrocture of poly(butylene terephthalate) (PBT) has been investigated at the different stages of the manufacture of a new generation of composite materials, i.e., commingled Twintex® PBT/glass fiber composites. From differential scanning calorimetry and wide angle X‐ray scattering analysis in additio…
Abstract In this work, the electrical and morphological properties of blends of poly(ethylene terephthalate) (PET), poly(methyl methacrylate) (PMMA), and carbon black (CB) were analyzed. Resistivity decreases similarly in both PET and PMMA with CB concentration. Similarly in the PET/PMMA blend, extensive modification…
Novel rheo-optical methods have been used to directly observe morphology evolution, during shear start-up and reversal flow, in semiflexible main-chain thermotropic liquid-crystalline polymers (TLCPs). Using a specially designed microrheometer allowing for simultaneous transient optical and mechanical observations, we…
CdS 0.65 Se 0.35 nanoparticles are grown in a glass matrix by thermally annealing a base glass material, in which Cd, S, and Se were introduced by diffusion. The starting base material contains no crystalline structure. A comparative study of the confinement effects on the annealed samples using photoluminescence, low…
Numerous nontoxic (resorbable) salts were prepared from cations and anions belonging to the human metabolism, such as Na, K, Mg, Ca, Zn and Fe in combination with chloride, iodide, hydroxide, carbonate, acetate, stearate, glycolate, L-lactate, D-mandelate and various N-substituted α-amino acids. All these salts were u…
Our high-pressure x-ray diffraction experiments on berlinite ${\mathrm{AlPO}}_{4}(\ensuremath{\alpha}\ensuremath{-}{\mathrm{AlPO}}_{4})$ show that it transforms to a crystalline Cmcm phase beyond 13 GPa. The persistence of diffraction pattern up to 40 GPa does not confirm the previous conclusions of high-pressure amor…
In one spatial dimension, the metastable dynamics and coarsening process of an n ‐layer pattern of internal layers is studied for the Cahn–Hilliard equation, the viscous Cahn–Hilliard equation, and the constrained Allen–Cahn equation. These models from the continuum theory of phase transitions provide a caricature of…