Materials Literature
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Relativistic calculations of the parameters β,γ and δ of the photoelectron angular distribution have been carried out using the quadrupole approximation for a number of atoms at photoelectron energies up to 10 000 eV. The calculations have been performed using the Dirac-Fock (DF) atomic model, the exchange interaction…
AIMS: The study investigated the physiology of Amaricoccus kaplicensis to determine whether it could outcompete polyphosphate accumulating bacteria in activated sludge systems removing phosphorus, by preferentially assimilating substrates in the anaerobic stages of these processes. METHODS AND RESULTS: The storage pro…
We analyse the possibilities of elastic matching and effective internal stress relief at the coexistence of polar phases in ferroelectric PbZr 1- x Ti x O 3 compositions close to the morphotropic phase boundary. The important role of the polydomain (twinned) monoclinic phase in this stress relief over wide concentrati…
Abstract A novel, fast, and simple synthetic procedure for polycarbamate/urea dendrimers, based on an AB–CD 2 coupling strategy, is presented. The reactivity difference of the two isocyanate functionalities of the AB building block allows the construction of these dendrimers without the necessity of activation or depr…
We propose that the behaviour of asymmetric binary fluid mixtures with a large class of attractive or repulsive interparticle interactions can be understood by mapping onto effective non-additive hard-sphere models. The latter are best analysed in terms of their underlying depletion potentials which can be exactly sca…
At least three phthalocyanine units can be incorporated into phosphonium salts to give compounds such as 1, following unprecedented exchange reactions between phthalocyanine moieties bound to a palladium center and phenyl groups bound to the coordinated phosphane. Preliminary second-order nonlinear optics studies of t…
Sol−gel-derived manganese oxide can readily be prepared as highly porous, nanostructured materials, including ambigel or aerogel monoliths and thin films supported on conductive, transparent glass. The electrochromic properties of manganese oxide, a mixed electron−cation conductor, provide an independent measure of th…
Complex permittivity and Young's modulus provide relevant information on the role of point defects in the dielectric and mechano-elastic properties of ferroelectric materials. Low-frequency measurements as a function of the temperature performed on Bi 4 Ti 3 O 12 (BIT) have shown that point and dipole defects are froz…
The diameters of HiPco single-wall carbon nanotubes were increased by heat treatments. The original diameters estimated from Raman spectra were in the range of 0.79 to 1.2 nm; they increased with the heat-treatment temperature, reaching about 1.47 nm after 1800 °C heat treatment. Thermogravimetric analyses showed that…
In the growth process of ultrathin films of vanadium oxides on Pd(111), a sequence of novel oxide phases with layer-dependent structures and oscillating oxidation states has been detected experimentally and understood theoretically. These phases are interface mediated and metastable with respect to further oxide growt…
This review focuses on the effect of flow fields on the orientation of block copolymer nanostructures in the melt and in solution. In particular, the alignment induced by strong shear fields or large extensional flows applied to model diblock and triblock copolymers is considered. The distinct orientation states of la…
The one-electron properties of a certain class of one-dimensional ternary quasicrystals are investigated. In particular, we show in detail the presence of a special kind of critical states called marginal critical states in these QCs. By the use of a real-space renormalization-group method, it is shown that the scalin…
Specific binding of biotinilated bovine serum albumin (bBSA) and tetramethylrhodamine-labeled streptavidin (SAv−TMR) was observed by conjugating bBSA to CdSe−ZnS core−shell quantum dots (QDs) and observing enhanced TMR fluorescence caused by fluorescence resonance energy transfer (FRET) from the QD donors to the TMR a…
Abstract Aluminum nitride (AlN) is known to have a high thermal conductivity and is one of the valid candidates as substrate material for integrated circuits. The material also has a potential in metal production and handling. However, AlN has only a moderate flexural strength and fracture toughness. It has been repor…
Abstract Ni, Pd and Cr thin films were grown on (100)SrTiO3 surfaces by molecular beam epitaxy at substrate temperatures of TNJ, pd=650°C and Tcr =150°C. Electron energy-loss spectroscopy (EELS) and high resolution transmission electron microscopy (HRTEM) were applied to investigate the local electronic structure and…
Employing a time dependent Ginzburg-Landau type model for nematic liquid crystals in two dimensions, we study the kinetics of nematic ordering in a porous medium following a zero temperature quench from the isotropic phase. We consider various geometrical properties of computer generated model porous media, and comput…
Abstract In conventional sintering, high heating rates are often used to enhance densification and reduce grain growth. The essence of this concept is to use fast heating rates to favor densification instead of grain growth, if the activation energy for densification is greater than that for grain growth. At low tempe…
We have determined the initial cleavage rate of the cyclobutane ring of poly[4,4′-oxydiphenylene-1,2,3,4-cyclobutanetetracarboximide] (CBDA-ODA) for linearly polarized ultraviolet light (LPUVL). The initial cleavage rates β// and β/ for LPUVL polarized parallel and perpendicular to the polyimide backbone direction, re…
Abstract The traditional application of titanium dioxide was as a white pigment; later, it was discovered their photocatalytic properties as an anode for the photo-oxidation of water. Furthermore, titanium dioxide films are now widely used in catalysis and photocatalysis because of low cost and other advantageous prop…
This paper describes the effect of terminal substituent on the mesomorphic properties in 3-and 4-(4-alkoxyphenoxycarbonyl)phenyl 3- and 4-R-benzoate and 4-(4-alkoxybenzoyloxy)phenyl 2-, 3-, and 4-R-benzoates (R = CF3, OCF3, OCF2H). The meta-trifluoromethoxy and para-difluoromethoxy compounds tend to show a smectic C p…