Materials Literature
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The electronic structure of pyrochlore-type ${\mathrm{Tl}}_{2}{\mathrm{Ru}}_{2}{\mathrm{O}}_{7},$ which undergoes a metal-semiconductor transition at ${T}_{t}\ensuremath{\sim}120\mathrm{K},$ has been studied by ultraviolet photoemission spectroscopy (UPS) and inverse-photoemission spectroscopy [bremsstrahlung isochrom…
We found an unusual negative thermal expansion in the simple perovskite ${\mathrm{MnF}}_{3}$ below the Neel point, where the spins are ordered in an A-type magnetic structure. The structure of ${\mathrm{MnF}}_{3}$ has been studied between 5 and 500 K using powder neutron and synchrotron diffraction. The structure rema…
A nonlinear model in the form of the Rayleigh-Plesset equation is developed for a gas bubble in an essentially incompressible elastic medium such as a tissue or rubberlike medium. Two constitutive laws for the elastic medium are considered: the Mooney potential, and Landau's expansion of the strain energy density. The…
Electrodeposition of NiFe 2 alloy from a non-aqueous ethylene glycol sulfate bath followed by electrochemical oxidation (anodization) of the alloy in an aqueous bath at room temperature is described as a novel electrochemical process to deposit spinel nanocrystalline NiFe 2 O 4 thin films on different conducting subst…
Very high-resolution inelastic x-ray scattering is employed to determine the dynamic response of the high-density crystalline water phases ice IX and ice XII in the $Q=2.0--15.5{\mathrm{nm}}^{\ensuremath{-}1}$ momentum transfer range. The spectra in the first and second Brillouin zone of the crystalline samples posses…
Results of a study on nucleation kinetics, growth, and characterization of strontium tartrate trihydrate single crystals in silica hydrogel are described. The basic structure, composition, and perfection of the grown crystals were determined by XRD, EDAX, and laser scattering tomography. It was found that experimental…
The thermopower, S , of La 0.7 Ca 0.3 Mn 1− y Fe y O 3 ( y = 0–0.09), measured for T = 25–310 K and magnetic fields of B = 0–10 T, exhibits strong sensitivity to doping with Fe. The weak increase of S observed in the undoped material with lowering temperature is enhanced considerably in the sample with y = 0.03 until…
Poly- dl -lactide end-capped by a protected thiol was synthesized by bulk ring-opening polymerization (ROP) of dl -lactide initiated by the reaction product of aluminum isopropoxide [Al ( i OPr) 3 ] with α- (2,4-dinitrophenylsulfenyl) ethanol. After the thiol deprotection, PLA-SH was used to stabilize gold nanoparticl…
The high-temperature behavior of KH 2 PO 4 and RbH 2 PO 4 has been investigated by several methods. Simultaneous differential scanning calorimetry and thermal gravimetry, combined with evolved gas analysis, was carried out from 25 to 500 °C under ambient pressure. The initial dehydration events in KH 2 PO 4 and RbH 2…
Abstract The nanostructures and morphologies of polyamide 6 (PA6)/organoclay nanocomposites prepared by melt compounding have been studied by using X‐ray diffraction (XRD) and transmission electron microscopy (TEM). A combination of XRD and TEM indicates that an exfoliated clay morphology dominates at low clay loading…
New bimetallic mu-oxo diferric complexes of several previously reported calix[4]pyrrole Schiff base macrocycles are described. The synthesis of a new member of this class of macrocycles is also reported; it was prepared via an acid-catalyzed condensation between 1,9-bisformyl-5,5-dipropyldipyrromethane and o-phenylene…
Biological fibrous composites commonly exhibit an architecture known as twisted plywood, which is similar to that of the cholesteric liquid-crystalline mesophases. The explanation for the structural similarity is that biological fibrous composites adopt a lyotropic cholesteric liquid-crystalline phase during their for…
The effects of the surface pressure on the particle arrangement of Langmuir-Blodgett (LB) monolayers of alkanethiol-capped gold nanoparticles were studied. The LB monolayers were prepared from a highly concentrated particle solution, which increases film fabrication efficiency but readily causes small particle voids i…
Optical properties of thermally evaporated nickel phthalocyanine thin films have been characterised using spectrophotometric measurements of transmittance and reflectance in spectral range 200–2100 nm. The refractive index n and the absorption index k were calculated. Some of the optical absorption parameters, namely…
The C-termini of Spidroins produced in the major and minor ampullate glands of spiders are highly conserved. Despite this conservation, no corresponding peptides have been identified in the spinning dopes or the silk filaments so far. To prove their presence or absence, polyclonal antibodies derived against fusion pro…
Surface-enhanced Raman scattering (SERS) from oxazine 720 (oxa), rhodamine 6G (R6G), and pyridine (py) adsorbed on a rough silver surface was observed. The silver electrode was immersed in aqueous solutions permitting control of the potential bias applied to the surface. SERS spectra in the Stokes and anti-Stokes regi…
We report measurements of the glass transition temperature ( T g ) in thin free-standing polymer films of polystyrene (PS) by means of confocal Raman spectroscopy. The paper introduces Raman spectroscopy as a novel method for the determination of T g in polymer thin films. We find excellent agreement between Raman sca…
New evidence for a nanophase separation of incompatible main and side chain parts in amorphous poly( n -alkyl methacrylates) with long alkyl groups are presented. Independent indications for the existence of alkyl nanodomains with a typical dimension in the 1 nm range from studies on dynamics and structure are reporte…
Molecular-dynamics simulations are presented for two correlation functions formed with the partial density fluctuations of binary hard-sphere mixtures in order to explore the effects of mixing on the evolution of glassy dynamics upon compressing the liquid into high-density states. Partial-density-fluctuation correlat…
Six dinuclear ferrous complexes including [Fe2(acpypentO)(O2CMe)(NCS)2] (1), [Fe2(acpypentO)(O2CMe)(NCSe)2] (2), [Fe2(acpypentO)(NCO)3] (3), ([Fe2(acpybutO)(O2CMe)(NCS)2] (5), [Fe2(acpybutO)(O2CMe)(NCO)2] (6), and [Fe2(acpybutO)(O2CMe)(N3)2] (7), one tetranuclear (bis-dinuclear) ferrous compound, [Fe4(acpypentO)2(N3)6…