Materials Literature
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A wet chemistry procedure which couples chemical functionalization and a dispersion—centrifugation cycle was applied to the dissolution and purification of as-prepared electric-arc produced single-walled carbon nanotubes (SWNTs). It is validated that K2S2O8 treatment generates hydrophilic groups such as carboxyl and h…
The family of bismuth titanate, Bi4Ti3O12 (BIT) layered-structured ferroelectrics materials is attractive from the viewpoint of their application as electronic materials such as dielectrics, piezoelectrics and pyroelectrics, because they are characterized by good stability of piezoelectric properties, a high Curie tem…
We describe new developments in hybrid conjugated materials containing metal complexes or nanoparticles. Phosphino-oligothiophenes are useful building blocks for metal-containing polymers and oligomers, and as cross-linkable surface passivating groups for metal nanoparticles. These materials may find application as ne…
Diatom frustules have been identified as potential candidate materials for nanotechnology applications. However, for successful engineering applications, their mechanical properties must be fully determined. Toward this end, indentation hardness and elastic properties frustules of the centric diatom Coscinodiscus conc…
The tetraazamacrocyclic ligand TRITA(4-) is intermediate in size between the widely studied and medically used 12-membered DOTA(4-) and the 14-membered TETA(4-). The kinetic inertness of GdTRITA(-) was characterized by the rates of exchange reactions with Zn(2+) and Eu(3+). In the Zn(2+) exchange, a second order [H(+)…
The single crystals of a closed form spirooxazine spiro[azahomoadamantane-isoquinolinoxazine] were found for the first time to undergo photocoloration processes consistent with photochromism in the single crystalline phase.
In a diblock copolymer system the free energy field depends nonlocally on the monomer density field. In addition there are two positive parameters in the constitutive relation. One of them is small, with respect to which we do singular perturbation analysis. The second one is of order 1, with respect to which we do bi…
Surface quality, geometry confinement, internal integrity, and mechanical properties are of great importance for the applications of microstructures fabricated by localized electrochemical deposition. This study shows that the copper microcolumn grown by resuming the anode and cathode to a given separation when the sh…
Degrees of orientation of main chains and imide rings were quantitatively estimated for spin-coated films of six kinds of aromatic polyimides (PIs) using polarized attenuated total reflection (ATR)/Fourier transform infrared (FT-IR) spectroscopy. The degrees of chain orientation parallel to the film planes are signifi…
Lamellar-bridged silsesquioxanes were obtained by the acid-catalysed hydrolytic condensation of a series of bissilylated organobridged molecular precursors. It was found that exploiting cooperative effects between the molecular interactions created by long hydrophobic hydrocarbon chains and the H-bonding between urea…
The Ni60Nb15Ti15Zr10 glassy alloy was developed as a separator material for a proton exchange membrane fuel cell (PEMFC). The corrosion rate of the glassy alloy in sulfuric acid was approximately 3 digits lower than SUS316L. A precise groove forming of the glassy alloy can be achieved by hot-pressing in the supercoole…
Secondary ammonium salts namely dicyclohexylammonium 4-nitrocinnamate 1, 3-nitrocinnamate 2, 2-nitrocinnamate 3 and the corresponding benzoate salts namely dicyclohexylammonium 4-nitrobenzoate 4, 3-nitrobenzoate 5 and 2-nitrobenzoate 6 have been prepared and scanned for gelation. Salts 1 and 2 display excellent gelati…
A key to the development of nanotechnology will be the ability to make complex nanoscaled three-dimensional structures at low cost and in large numbers. The wide variety of structures in the silicified cell walls of diatoms offers a promising natural source of such materials. Diatom silica can be converted into other…
An artificial siderophore in the form of a squaraine dye (1) has been synthesized. The bidentate ligand chelates to Fe(III) between the deprotonated hydroxyl group on the ortho position of the ring adjacent to the carbonyl group of the cyclobutadiene ring. The optical response is due to a subtle geometry change of 1 o…
The permeability characteristics and water-solubility of edible pectin–soy flour films obtained in the absence or presence of the enzyme transglutaminase were investigated and compared with those possessed by both the commonly used high density polyethylene film and the biodegradable Mater-Bi® film. The soy protein tr…
Herein, we demonstrate that NEXAFS is a very effective technique at (a) identifying the phases of boron nitride nanotubes with the potential of distinguishing between hexagonal BN and cubic BN, and (b) monitoring the presence of defects and degree of crystallinity in nanoscale samples. Specifically, a prepared sample…
Air flow management and control in a fuel cell gas turbine hybrid power system is evaluated using the Hybrid Performance (Hyper) hardware simulation facility at the National Energy Technology Laboratory (NETL), U.S. Department of Energy. The Hyper facility at NETL is a hardware simulation of a fuel cell gas turbine hy…
Article Influence of polyelectrolyte complexes on the strength properties of papers from unbleached kraft pulps with different yields was published on January 1, 2005 in the journal Nordic Pulp & Paper Research Journal (volume 20, issue 1).
Selected corrosion properties of the recently developed amorphous Al-Co-Ce alloy system are reported over a range of cobalt and cerium compositions. Improved resistance to halide-induced pitting was observed in 0.6 M NaCl solution when fully amorphous and aged alloys (100°C for up to 1000 h) were compared to polycryst…
Lanthanide silylamides were grafted onto non-porous silica dehydroxylated at various temperatures, and the surface species nature and relative distribution were correlated with MMA polymerisation activity and selectivity.