Materials Literature
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Young's modulus, hardness and fracture toughness of highly ordered nanoporous alumina (PAA) were measured by nanoindentation and Vickers microindentation. A finite element model that accounts for the anisotropy and the pores was developed to extract the Young's modulus and hardness values from the experiments. The mea…
Polyaniline(PANI) microwires containing CdS nanoparticles have been prepared by introducing hydrogen bonding and/or electrostatic interaction between mercaptocarboxylic acid capped CdS nanoparticles and PANI. SEM and TEM proved them to be wire-like structures. PL spectra of the PANI/CdS complex is blue-shifted by 14 n…
Thin films of tungsten oxide, titanium doped tungsten oxide and overlayers of titanium oxide/tungsten oxide have been produced by aerosol assisted CVD (AACVD) at 400 °C. The films were crystalline monoclinic WO3 by XRD, showing strong preferred orientation in the (0 2 0) plane. Films were blue on deposition (WO3−x; x…
This paper addresses some of the underlying statistical assumptions and issues in the collection and refinement of powder diffraction data. While standard data collection and Rietveld analysis have been extremely successful in providing structural information on a vast range of materials, there is often uncertainty ab…
Magnetic nanodot arrays were prepared from thin film templates of cylinder-forming polystyrene-polylactide diblock copolymers by first annealing the films to obtain PLA cylinders oriented perpendicular to the surface, then selectively staining the PS matrix with RuO4 vapors, followed by etching the cylinders by O2-rea…
The deposition, stability, and function of carbonaceous films formed by exposing porous yttria-stabilized zirconia (YSZ) anodes in YSZ-based solid oxide fuel cells (SOFCs) to n-butane at elevated temperatures was studied using a combination of four-probe conductivity, impedance spectroscopy, and cell polarization meas…
Selectivity in the binding of phosphorylated tyrosine residues to aqua-lanthanide complexes is signalled by changes in spectral form by luminescence emission and 1H NMR spectroscopy.
A novel nano-composite material of Ni(OH)2/USY was prepared in our lab. This nanostructure creates electrochemical accessibility of electrolyte OH- ions to Ni(OH)2 thin layers and a fast diffusion rate within the redox phase.
To be able to determine the elemental composition and morphology of individual nanoparticles consisting of no more than a dozen or so atoms that weigh a few zeptograms (10(-21) g) is but one of the attainments of modern electron microscopy. With slightly larger specimens (embracing a few unit cells of the structure) t…
Article Application of Vibration Technology to Polymer Electrospinning was published on September 1, 2004 in the journal International Journal of Nonlinear Sciences and Numerical Simulation (volume 5, issue 3).
Five heat treat options for an advanced nickel-base disk alloy, LSHR, have been investigated.These included two conventional solution heat treat cycles, subsolvus/oil quench and supersolvus/fan cool, which yield fine grain and coarse grain microstructure disks respectively, as well as three advanced dual microstructur…
Examples of a new class of zwitterionic, “right-hand side” merocyanines containing a cyanodicyanomethylidenedihydrofuran electron acceptor have been prepared. As well as allowing for the facile synthesis of these chromophores, our synthetic methodology enables considerable variation in both the donor moiety as well as…
Cyanide-functionalized mesoporous silica SBA-15 (CN/SBA-15) with pore diameters larger than 6 nm has been prepared by a one-pot synthesis. The structure of CN/SBA-15 is affected by the amount of the functional silane 2-cyanoethyltriethoxysilane (CTES) and the conditions of co-condensation in the acidic aqueous solutio…
We report a one-pot synthesis of regioregular polythiophene stabilized gold nanoparticles with narrow size distributions that can form fibril-like structures due to the self-assembly of regioregular polythiophene.
For wetland soil studies, it would be desirable to estimate soil redox status and its effect on element translocations based on diagnostic redoximorphic features. However, their identification and interpretation is often complicated and require a regional calibration. This study was conducted (i) to determine the rela…
Photochromic performance of diarylethene single crystals was controlled by crystal engineering using non-covalent aromatic-aromatic interactions as the directional intermolecular force. A diarylethene derivative with two pentafluorophenyl groups, 1,2-bis(2-methyl-5-pentafluorophenyl-3-thienyl)perfluorocyclopentene (1a…
Results of the electrical conductivity study of highly textured, ultrathin (15 nm) cubic yttria-stabilized zirconia (YSZ) thin films are presented for the first time. A nanoscale effect that results in exceptionally high ionic conductivity at moderate temperatures is detected in films less than 60 nm thick. The conduc…
Bimodal porous carbons with both micropores and meso- or macropores were selectively synthesized by an colloidal crystal-templating process. The opal templates exclusively contributed to the formation of meso- and macropores in carbons. The electrical double-layer capacitance per surface area of the templated porous c…
Electrocrystallization of (o-P2)Mo(CO)4, where o-P2 is the tetrathiafulvalene-based chelating diphosphine o-Me2TTF-(PPh2)2, in the presence of the Linquist anion Mo6O192− affords a 2:1 salt, formulated as [(o-P2)Mo(CO)4]2[Mo6O19], with a Heisenberg spin chain magnetic behaviour.
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