Materials Literature
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Recently, it was proposed that neutrophils generate ozone. Evidence for the proposal is based largely on three experimental systems using probes that are known to react with ozone. However, further assessment of the findings shows that in each case, there is a plausible alternative explanation. Oxidation of indigo car…
We calculate the mean end-to-end distance R of a self-avoiding polymer encapsulated in an infinitely long cylinder with radius D. A self-consistent perturbation theory is used to calculate R as a function of D for impenetrable hard walls and soft walls. In both cases, R obeys the predicted scaling behavior in the limi…
I present herein the development of highly active and reusable polymeric catalysts produced by self-assembly process of non-cross-linked amphiphilic polymeric ligands with inorganic species. Thus, PWAA 1 prepared from H3PW12O40 and poly[(N-isopropylacrylamide)-co-(acrylamide with ammonium salt)] is suitable for oxidat…
The synthesis and magnetic characterization of pegylated bis(aminoxyl) diradical with an S= 1 ground state are presented, revealing water-induced changes in the molecular conformation and magnetic properties.
Electrodeposition of hydrated was performed successfully using an acidic solution on a highly boron-doped diamond (BDD) substrate. The electrochemical and photoelectrochemical properties indicated interesting and improved photocatalytic behavior of n-type . Scanning electron microscopy showed that the resulting hydrat…
We have synthesized a novel dendrimer (1) based on two covalently linked cyclam units as a core appended to six branches, each one consisting of one dimethoxybenzene and two naphthyl units (cyclam = 1,4,8,11-tetraazacyclotetradecane). Such a dendrimer shows three fluorescence bands which can be assigned to naphthyl lo…
Structural characterization of a nickel aryldiazo complex supported by the bulky 1,2-bis(di-tert-butylphosphino)ethane ligand reveals square-planar Ni geometry and an unusual side-on coordination mode for the N2R moiety, while the related nitrosyl complex displays trigonal-planar geometry at Ni and end-on coordination…
Novel mixed amido-/imido-/guanidinato-complexes of tantalum are reported. The complexes were synthesised by insertion reactions of carbodiimides of the type C(NR)2(R =iso-propyl (i-Pr)) into the M-N bonds of tantalum mixed amido/imido complexes. Three representative complexes were synthesised and fully characterised b…
Under NEDO project "The development for advanced thermoelectric conversion system", Komatsu Ltd. is involved in R&D for suicide, Bi-Te and their cascading modules. Aiming to 15% of conversion efficiency /spl eta/ under the hot side T/sub h/=580/spl deg/C and the cold side T/sub c/=30/spl deg/C until March, 2007, 12% a…
Bi2Te3 nanocapsules with hollow structure have been successfully synthesized by a low temperature aqueous chemical route in an open system at 65 °C. The nanocapsules are 50–200 nm in diameter and 100–800 nm in length. The tube walls have a thickness of about 6 nm with the normal parallel to the c-axis of the Bi2Te3 cr…
An Al-Co-Ce alloy system has been developed with two important protection abilities when deployed as a metal coating over AA2024-T3. These alloy coatings can both act as a sacrificial anode and supply soluble ions that could function as inhibitors. In this paper, the electrochemical (or electrolytic) throwing power of…
A classical electrostatic polarization scheme using the additive distribution procedure has been applied to determine the static longitudinal polarizability and second hyperpolarizability of a all-trans hexatriene molecule in an infinite stretched fiber. The parameters have been derived from ab initio coupled-perturbe…
The three refractive indices of a liquid crystal that exhibits lamellar analogues of the three‐dimensional isotropic, nematic, and smectic A phases are reported as functions of temperature for the Lam‐I and Lam‐N phases. The data suggest a number of striking behaviour types. The orientational distribution of the mesog…
-based phosphors doped by were studied for use in white light emitting diodes (LEDs). Variations of excitation and emission spectra by changes in the alkaline earth ions in host lattice were studied. It was found that the system was excellent for white LED applications with excitation in the 380-465 nm region. Special…
Novel Y-junction polyaniline (PANI) nanorods and nanotubes (40–100 nm in diameter and a few micrometers in length) were selectively prepared, for the first time, using in situ self-assembly of water-soluble Fe3O4 nanoparticles coated with polyethylene glycol(5) nonylphenyl ether (NP5) and cyclodextrin (CD) as template…
The ratio of monomer and excimer emissions of a triad 1 with tetrathiafulvalene (TTF) and pyrene units could be reversibly modulated by the different oxidation states of the TTF unit. The working mechanism of this new fluorescence switch was demonstrated to be the collective result of the tunable photoinduced electron…
<title>Abstract</title> The ecology of algae associated with benthic habitats in freshwater lentic environments such as lakes and wetlands and the primary biotic and abiotic factors (i.e., nutrients, light, hydrodynamics and herbivory) affecting their productivity are reviewed. There is a growing consensus that periph…
Dendritic growth, and the formation of material microstructure in general, necessarily involves a wide range of length scales from the atomic up to sample dimensions. The phase field approach of Langer, enhanced by optimal asymptotic methods and adaptive mesh refinement, copes with this range of scales, and provides a…
Abstract Layered double hydroxides (LDHs), also known as hydrotalcite-like compounds (HTs), anionic clays, and mixed-metal layered hydroxides (MMLHs), are unusual among oxide and hydroxide materials in having large permanent positive layer charges and, consequently, large anion exchange capacities. Interest in the LDH…
Successful development of hydrogen separation membranes based on mixed ionic and electronic conductors would improve the economics of hydrogen production. The combination of high proton conductivity and good chemical stability is desirable for practical applications. In this paper, we report a new compound, BZCY6 , as…