Materials Literature
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Milling of V 2 O 5 in a ball mill increased the surface area from 7 to a maximum of 32 m 2 /g. Simultaneously, XRD line broadening suggested a reduction of the microcrystallites. A color change during milling indicated oxygen loss, and Raman spectroscopy provided evidence for the formation of shear structures such as…
Acrylic, cotton, and wool 1 × 1 rib knitwear fabrics are subjected to up to fifty laundering cycles in a variety of washing and drying conditions. Tactile and mechanical properties of the new and washed fabrics are quantified using subjective and objective evaluation methods. Principal components analysis (PCA) identi…
Results are provided from molecular-dynamics (MD) simulations for a ${\mathrm{Ni}}_{0.5}{\mathrm{Zr}}_{0.5}$ model adapted to Hausleitner-Hafner interatomic potentials, including estimates for the formation energies of vacancies, interstitials, and antisite defects in the orthorhombic structure of the intermetallic co…
The isothermal crystallization of isotactic polypropylenes has been studied under static conditions and under shear flow. The shear was induced by displacement of a glass fibre in the molten polymer. An α-monoclinic crystalline phase was formed with a columnar organization at the surface of the glass fibre, which did…
The ligands 3-ethyl-4-methylpyridine (3-Et,4-Mepy) and azide coordinate to MnII forming an alternating chain with the formula [Mn(3-Et,4-Mepy)2(μ-N3)2]n. This compound crystallizes in the space group P–1. The compound consists of chains of octahedrally coordinated manganese atoms alternately bridged by double end-to-e…
Columnar discotic carboxylic esters of 2-hydroxy-3,6,7,10,11-penta(1-pentyloxy)triphenylene, characterized by a variety of functional groups, were prepared with the purpose of studying the effects of the substituents on the mesophase behaviour. Bulky substituents and polar substituents were found to destabilize the co…
Dialogues for the estimation of crystallite size, shape and lattice strain are designed and included in an X-ray powder diffraction (XRPD) program, named AXES . They implement peak fitting and Voigt analysis followed by a Williamson–Hall plot (WHP). Eight different peak-shape functions can be used for individual peak…
Acrylic monomers and polymers have been intercalated in the lamellar structure of an iron substituted nickel layered double hydroxide (LDH) (Ni:Fe=7:3). The synthesis consists of an original step-by-step soft chemistry preparation route in which the formation of the Ni0.7 Fe0.3O2 slabs is dissociated from intercalatio…
A new Monte-Carlo program for simulation of low energy electron scattering in solids is presented. Applications to electron microscopy and electron microprobe analysis are discussed. Elastic interactions are described by Mott cross sections within the framework of partial wave analysis (PWA) whereas the inelastic coll…
Abstract This work examines the influence of well‐defined diblock copolymers on the interfacial tension and morphology of an immiscible polymer blend. The system studied is a blend of 80% polystyrene and 20% ethylene propylene copolymer compatibilized by diblock copolymers of poly(styrene‐hydrogenated butadiene). The…
Nitrogen dioxide was applied for molecular beam epitaxy of ZnO on (0001) sapphire substrates. Equipped with liquid nitrogen cryoshrouds, the pressure inside the chamber was kept below 1×10 -7 Torr during growth. The samples were characterized by reflection high energy electron diffraction, X-ray diffraction, photolumi…
Ligand-assisted templating with carboxylate surfactants is used to produce micro- and mesoporous zirconias in a method where the organic template can be removed with a simple acid treatment obviating the usual harsh calcination conditions required to remove templates from transition metal oxide molecular sieves. A new…
Enzymatic and non-enzymatic iodination of the amino acid tyrosine is a well known phenomenon. The iodination technique has been widely used for labeling proteins. Using high-resolution X-ray crystallographic techniques, the chemical and three-dimensional structures of iodotyrosines formed by non-enzymatic incorporatio…
We propose a hydrodynamic model that justifies the surface viscosity already introduced as a phenomenological parameter in the surface dynamics of nematic liquid crystals. In this model the surface orienting field of a substrate is assumed to be diluted in a thin boundary layer that is described by the balance equatio…
The preparation and characterization of the properties of mullite ceramic foams suitable for diesel exhaust filtration systems are described. Two foams of different cell sizes, 32 and 61 ppi (pores per inch), were prepared from slurries by the replication process with polyurethane sponges as the templates. The microst…
The non-enzymatic deamidation of Asn to Asp is known to occur in proteins and peptides and is accelerated by phosphate buffer [Tyler-Cross, R. and Schirch, V. (1991) J. Biol. Chem. 25, 22549-22556]. We attempted to identify the site in lysozyme where a phosphate ion binds by means of 1H-15N HSQC measurements of 15N-la…
Preferentially (105)-oriented Sr 0.7 Bi 2.8 Ta 2 O 9 (SBTO) thin films on SiO 2 /n-Si(100) have been prepared by a pulsed laser deposition method at temperatures as low as 350°C, which is the lowest process temperature for growing SBTO ferroelectric thin films. Dielectric properties of SBTO films have been improved by…
Polycrystal plasticity models are commonly developed with a narrow focus on the grain as the fundamental unit of crystallographic orientation and anisotropic behavior. However, deformation and strengthening mechanisms occur simultaneously at multiple length scales and may lead to bulk deformation behavior of metals th…
Phase diagrams of SrTiO3-based solid solutions with PbTiO3, BaTiO3, and CaTiO3 have been analyzed using our own experimental data and some data from the literature on dielectric, ultrasonic, and optical properties. At small concentration x of the second end-member of solid solutions, ferroelectric phase transition tem…
We have synthesized and characterized the following four metalloporphyrins: Fe(OEP)(CO)(1-MeIm), Ru(OEP)(CO)(1-MeIm), Os(OEP)(CO)(1-MeIm), and Fe(TPP)(iPrNC)(1-MeIm), where OEP = 2,3,7,8,12,13,17,18-octaethylporphyrinate, TPP = 5,10,15,20-tetraphenylporphyrinate, and 1-MeIm = 1-methylimidazole, using single-crystal X-…