Materials Literature
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It has recently been shown that the intercalation and subsequent in situ polymerization of organic monomers within the interlayer of clay minerals yields nanocomposites with novel material properties. We present results of plane-wave density functional theory (DFT) based investigations into the initial stages of the p…
The synthesis of compounds containing polyhedral boron cages and porphyrin or phthalocyanine units connected covalently in one molecule is reviewed. The importance of these compounds arises, on the one hand, from the use of polyhedral boron derivatives in neutron capture therapy for cancer; on the other hand, porphyri…
Collagen nanofibers were generated at ambient temperature and pressure by electrospinning a 1 wt% solution of type I collagen and polyethylene oxide. Products were imaged with high-resolution scanning electron microscopy (HRSEM) at medium (approximately 30,000 x) and high magnifications (approximately 100,000 x) and w…
Silver nanowires grow from highly Ag+-loaded zeolitesat the impact of the electron beam from a transmission electron microscope. Both bent, polycrystalline (see Figure), and straight single crystal wires (15 to 150 nm wide, and up to tens of μm long) can be obtained. Their formation can be rationalized as the reductio…
Fluoro-edenite, ideally NaCa 2 Mg 5 (Si 7 Al)O 22 F 2 , was found both as prismatic or acicular crystals of millimetric size and as fibers in the rock cavities in gray-red altered benmoreitic lavas occurring at Biancavilla (Etnean Volcanic Complex, Catania, Italy). It is associated with feldspars, quartz, clino- and o…
Spontaneous octupolar ordering in a dendrimer has been observed for highly nonlinear ruthenium complexes. Various oligomers containing N ruthenium-tris-bipyridine monomers have been synthesized and characterized. The quadratic nonlinear properties of supramolecular dendritic or predendritic structures are reported for…
Single‐crystal layers of 0.65Pb(Mg 1/3 Nb 2/3 )O 3 ·0.35PbTiO 3 (PMN‐35PT) were grown heteroepitaxially on {001}‐BaTiO 3 template crystals. A {001}‐BaTiO 3 crystal was embedded in a fine‐grained matrix of PMN‐35PT containing excess PbO and heated between 950° and 1150°C for 0–5 h. The initial growth of the PMN‐35PT on…
A dichlororuthenium(IV) complex of 5,10,15,20-tetrakis[(1S,4R,5R,8S)-1,2,3,4,5,6,7,8-octahydro-1,2:5,8-dimethanoanthrance-9-yl]porphyrin, [Ru(IV)(D(4)-Por)Cl(2)] (1), was prepared by heating [Ru(II)(D(4)-Por)(CO)(MeOH)] (2) in refluxing CCl(4). Complex 1 is characterized by (1)H NMR (paramagnetically shifted pyrrolic…
The Young’s modulus of diamond-like carbon (DLC) pillars was measured by means of mechanical vibration using scanning electron microscopy. The DLC pillars were grown using Ga+ focused ion beam-induced chemical vapor deposition with a precursor of phenanthrene vapor. The Young’s modulus of the DLC pillars was around 10…
A method to perform a predictive search for a given amplitude and phase modulation response in twisted nematic liquid crystal displays is presented. The algorithm is based on a simple physical model that we recently proposed and that considers the effect of liquid-crystal layers located in the vicinity of the edges, w…
Uniform complete shells in one step on a time scale of minutes can be achieved by solvent-controlled precipitation of nanocrystals on the surface of colloidal particles. The thickness of the shells can be effectively controlled through the proper choice of the concentration ratio of colloidal particles serving as core…
Crystal structures of Ba2In2O5: (Ba1−xLax)2In2O5+x (x=0.1, 0.2, 0.3, and 0.5), and Ba2(In1−xGax)2O5 (x=0.1, 0.2 and 0.5) are analyzed by transmission electron microscopy and electron diffraction. Ba2In2O5 has an orthorhombic brownmillerite structure and belongs to space group Ibm2. (Ba1−xLax)2In2O5+x has a tetragonal…
Based on Eringen’s micropolar elasticity theory (MET), a two‐dimensional finite element formulation including one extra degree of freedom is derived by using a linear triangular element, and a corresponding computer program is also developed. By varying the technical constants such as micropolar Young’s modulus E m ,…
An electron beam inspection system based on the projection imaging electron microscope was developed and the proof-of-concept system has been constructed and evaluated. The secondary electrons are projected through the projection imaging optics and imaged onto the image detection system. The projected secondary electr…
The crystal structure of hydrothermally formed Al‐substituted tobermorite‐1.1nm (Ca 4.9 Si 5.5 Al 0.5 O 16.3 (OH) 0.7 ·5H 2 O) has been analyzed using synchrotron radiation powder diffraction data. Crystallographic positions of a zeolitic Ca atom and three water molecules in the channel of the framework were determine…
Abstract The rheological behavior and crosslinking kinetics of model filled rubber compounds during curing were investigated. The effect of chemical composition of monodisperse size particles, prepared by emulsifier‐free emulsion polymerization, on dynamic moduli and gelation time of the filled compounds was studied.…
Different types of magnetic structures were described in terms of a propagation vector and some of its associated basis vectors. Group Theory calculations were used for magnetic symmetry analysis. The use of symmetry in the proper descripton and solution of magnetic structures was demonstrated.
The synthesis of a metal-free form of texaphyrin, an aromatic porphyrin-like macrocycle, is described. Previously, texaphyrins could only be obtained reproducibly in the form of metal complexes. Using ferrocenium cation as the oxidizing agent and starting with a reduced porphyrinogen-like nonaromatic form of texaphyri…
We investigated major physical-chemical characteristics and benthic algae of different alpine lotic systems comprising streams and lake outlets of rhithral and kryal origin over an annual cycle. We also evaluated the structure of the algal communities and its relation to environmental characteristics for the different…
BACKGROUND/AIMS: The aim of this article is to propose a new way to measure the mechanical behaviour of skin by using optical analysis software. Some examples on scars and stretch marks show the validity and the prospects of such a method. METHODS: Software is used to compare two states of deformation. The user takes…