Dehydrocoupling of dimethylamine-borane catalysed by rhenium complexes and its application in olefin transfer-hydrogenations
Re(I) complexes are applied as catalysts for the dehydro-coupling of Me2NH.BH3 and the transfer-hydrogenation of olefins.
Materials Literature
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The Stability of LSF-YSZ Electrodes Prepared by Infiltration
Composite electrodes were prepared by adding (LSF) into porous yttria-stabilized zirconia (YSZ) and their performance was studied as a function of time and calcination temperature. X-ray diffraction (XRD) patterns of the LSF-YSZ composites indicated an expanded lattice parameter after calcination above , suggesting th…
Catalysts based on palladium dendrimers
This report reviews the role of palladium dendrimers in catalysis as (a) soluble macromolecules for the support of catalysts, that are separable by nanofiltration techniques; (b) ligand-modifiers that can create specific metal nanoenvironments and tune the solubility of the catalyst; (c) spacers for the support of mol…
On the activation of molecular hydrogen by gold: a theoretical approximation to the nature of potential active sites
The study of adsorption and dissociation of molecular hydrogen on single crystal Au(111) and Au(001) surfaces, monoatomic rows in an extended line defect and different Au nanoparticles by means of DF calculations allows us to firmly conclude that the necessary and sufficient condition for H2 dissociation is the existe…
Fabrication and Characterization of p-n Homojunctions in Cuprous Oxide by Electrochemical Deposition
The conduction type (n- or p-type) of electrochemically deposited cuprous oxide can be controlled by solution pH. It was found that cuprous oxides deposited at solution pH below 7.5 are n-type semiconductors, while cuprous oxides deposited at a solution pH above 9.0 are p-type semiconductors. A two-step process was ad…
A mixed-valence Co7 single-molecule magnet with C3 symmetry
The synthesis, structure and magnetic properties of [Co(II)(4)Co(III)(3)(HL)(6)(NO(3))(3)(H(2)O)(3)](2+) [H(3)L = H(2)NC(CH(2)OH)(3)] are reported: the complex is an exchange-biased single molecule magnet.
Functionalized carbon nanotubes for polymeric nanocomposites
Functionalized carbon nanotubes are more favorable for the desired homogeneous dispersion of exfoliated nanotubes as nanoscale fillers in polymeric nanocomposites. However, the compatibility of the large amount of functional groups necessary for the nanotube functionalization with the polymeric matrices is critical to…
Hydrogen storage in nanoporous carbon materials: myth and facts
We used Grand canonical Monte Carlo simulation to model the hydrogen storage in the primitive, gyroid, diamond, and quasi-periodic icosahedral nanoporous carbon materials and in carbon nanotubes. We found that none of the investigated nanoporous carbon materials satisfy the US Department of Energy goal of volumetric d…
Aligned MWCNT Sheet Electrodes Prepared by Transfer Methodology Providing High-Power Capacitor Performance
Aligned MWCNT Sheet Electrodes Prepared by Transfer Methodology Providing High-Power Capacitor Performance, Honda, Yuichi, Haramoto, Tetsuhisa, Takeshige, Masayuki, Shiozaki, Hideki, Kitamura, Takaharu, Ishikawa, Masashi
Biomimetic design through natural language analysis to facilitate cross-domain information retrieval
Biomimetic, or biologically inspired, design uses analogous biological phenomena to develop solutions for engineering problems. Several instances of biomimetic design result from personal observations of biological phenomena. However, many engineers' knowledge of biology may be limited, thus reducing the potential of…
Templateless, surfactantless, simple electrochemical route to rapid synthesis of diameter-controlled 3D flowerlike gold microstructure with “clean” surface
We report for the first time a simple low-cost electrochemical route to synthesis of diameter-controlled hierarchical flowerlike gold microstructures with "clean" surfaces using gold nanoplates or nanopricks as building blocks without introducing any template or surfactant.
Electrical relaxation dynamics in TiO2 – polymer matrix composites
Polymer matrix-TiO2 composites were prepared in three different filler concentrations. The electrical relaxation dynamics as well as the electrical conductivity of all samples were examined by means of Broadband Dielectric Spectroscopy (BDS) over a wide frequency and temperature range. The recorded relaxation response…
Interactive Effects of Albumin and Phosphate Ions on the Corrosion of CoCrMo Implant Alloy
The corrosion behavior of CoCrMo alloy in simulated body fluids has been analyzed by electrochemical techniques and surface analysis. Interaction of albumin and phosphates present in the body fluids on the passive film of the alloy was also investigated. Electrochemical techniques such as potentiodynamic and potentios…
Using colloidal lithography to fabricate and optimize sub-wavelength pyramidal and honeycomb structures in solar cells
The external quantum efficiency of solar cells can be improved by using texturing pyramid- and honeycomb-like structures with minimum reflection. In this study, we investigated the reflection properties of texturing structures through rigorous coupled-wave analysis and the three-dimensional finite-difference time doma…
Dendrimers and magnetic resonance imaging
The multivalent character of dendrimers has positioned these well-defined, highly branched macromolecules at the forefront in the development of new contrast agents for biomedical magnetic resonance imaging (MRI). By modifying the periphery of the dendrimer with gadolinium(III) chelates, the relaxivity of the resultin…
Luminescence of Native Defects in Zn[sub 2]GeO[sub 4]
Pure phase Zn 2 Ge O 4 was fabricated by solid state reactions and the products were annealed in various atmospheres, such as O 2 , air, N 2 , vacuum, Zn, and Ge. The material was a native defect phosphor presenting white-bluish emission and its photoluminescence was about 40% brighter than that of the commercial ZnO…
Silica Segregation in the Ni∕YSZ Electrode
Solid oxide fuel cells were tested as solid oxide electrolysis cells used for high-temperature steam electrolysis.The cells were tested at a variety of operation temperatures, current densities, and gas flows to the electrodes.The cell voltages monitored during the electrolysis operation increased significantly during…
Segmental dynamics in miscible polymer blends: recent results and open questions
In this short review we summarize the outcome of the large amount of effort made during the past decade from both the experimental and the theoretical point of view in order to understand the effect of blending on the segmental dynamics in polymers. Each of the two families of models proposed-one based on thermally ac…
Material encapsulation and transport in core–shell micro/nanofibers, polymer and carbon nanotubes and micro/nanochannels
In this article, we review recent work on the co-electrospinning of polymer core–shell nanofibers and the manufacture of hollow nanotubes. The encapsulation and release of bioactive compounds from co-electrospun core–shell fibers is considered next, bearing in mind such applications as sensors and drug release. Then,…
Reversal of multidrug resistance by transferrin-conjugated liposomes co-encapsulating doxorubicin and verapamil.
PURPOSE: Liposomes co-encapsulating doxorubicin (DOX) and verapamil (VER), and conjugated to transferrin (Tf-L-DOX/VER) were synthesized and evaluated in K562 leukemia cells. The design of this formulation was aimed at selective targeting of tumor cells, reducing cardiotoxicity of DOX and VER, as well as overcoming P-…