Materials Literature
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Ru is examined as a barrier/seed layer in different layer stacks, with and without Ta, for a Cu/low-κ system. Ru was found to promote a more pronounced Cu(111) texture than Ta, and the texturing appears to increase with the increase of the Ru-layer thickness. Physical-vapor-deposited Cu films on both Ru and layers are…
Abstract: Principal features of method of metal magnetic memory (MMM) as compared to known magnetic NDT methods are considered. Among the basic features of the MMM method, that it is based on use of the own magnetic leakage field (SMLF), arising in ferromagnetic and paramagnetic products on accumulations of high-densi…
Replication of mesoporous silica to ordered mesoporous carbon (OMC) has been studied with the recently discovered large-pore MCM-48-like cubic Iad mesoporous silica (KIT-6), with particular interest in the effect of the silica pore connectivity. The carbonization was performed with sucrose or furfuryl alcohol under va…
A CH4 atmospheric rf plasma treatment process was demonstrated for hydrophobic treatments of various substrates including metallic and insulating surfaces as well as flat and rough surfaces. A stable rf glow plasma was generated over a 1 cm × 16 cm area using a cylindrical electrode geometry. A typical hydrophobic tre…
Vanadium oxide was electrodeposited on a carbon nanotube (CNT) film substrate with a three-dimensional porous structure at the nanometer scale as an electrode material for pseudocapacitors using organic electrolytes. Microstructures of the electrochemically prepared on the CNT film substrate ( /CNT film electrode) sho…
A new formulation of gradient elasticity is derived and implemented. Padé approximations are used to introduce an implicit relation between non-local strains and displacements. As a result, the finite element interpolation requires only 𝒞0-continuous (rather than 𝒞1-continuous) shape functions. The underlying energy f…
The present paper shows the potential of fumed silica as nano-reinforcements in polymers, by considering the limitations and challenges one has to face dealing with nanoparticles in general. The dominating effect of the manufacturing route and surface properties of fumed silica influencing the resulting degree of disp…
It has been known that classical continuum mechanics laws fail to describe strain localization in granular materials due to the mathematical ill-posedness and mesh dependency. Therefore, a non-local theory with internal length scales is needed to overcome such problems. The micropolar and high-order gradient theories…
To develop high-temperature shape memory alloys, Ti–50(Pt,Ir)mol% compounds are noted because of their martensitic transformation from B2 to B19(2H) or 4H(4O) structures above 1273 K. A thermal expansion measurement and loading-unloading compression test were performed for Ti–50(Pt,Ir) to determine if the shape memory…
Conformational control of the receptor-fluorophore orientation of BF2 chelated azadipyrromethene sensors reveals two photophysically different modes of analyte triggered fluorescence switching both of which exhibit large off-on fluorescence intensity responses to the light input-output of the sensors in the visible re…
We report on the observation of the excitation/emission spectrum of a dendrimer-encapsulated gold nanocluster; the synthesis of Au-PAMAM was based on reduction of HAuCl4 x 3 H2O co-dissolved in methanol together with fourth-generation OH-terminated PAMAM.
Silicone rubber is universally regarded as the best-in-class elastomer for extreme environments. In addition, silicone rubber is one of the most permeable elastomers. This property is a key advantage for silicone rubber in many design situations. However, some applications which require silicone performance in extreme…
Deposition and Evaluation of Protective PVD Coatings on Ferritic Stainless Steel SOFC Interconnects, Gorokhovsky, V. I., Gannon, P. E., Deibert, M. C., Smith, R. J., Kayani, A., Kopczyk, M., VanVorous, D., Yang, Zhenguo, Stevenson, J. W., Visco, S., Jacobson, C., Kurokawa, H., Sofie, S. W.
A new effective approach for estimating the Leslie coefficients of liquid crystals based on MBBA data is presented. Literature values of the temperature‐dependent Leslie viscosity coefficients of MBBA are used to fit with the analytical functions of Leslie coefficients based on the Imura and Okano theory, and a set of…
In this work, the effects of preparation conditions in roughening silver substrates by electrochemical triangular-wave oxidation-reduction cycles (ORC) on surface-enhanced Raman scattering (SERS) were investigated. Based on this prepared substrate, the practical limit of detection (LOD) of rhodamine 6G (R6G) can be re…
Abstract The crystal structures and magnetic properties of heterocyclic thiazyl radicals and related materials have been examined. TTTA (=1,3,5-trithia-2,4,6-triazapentalenyl) exhibited a first-order phase transition between a paramagnetic high-temperature (HT) phase and a diamagnetic low-temperature (LT) phase, with…
The overall objective of this effort is to support DOE with independent system level analyses of various H2 storage approaches, to help to assess and down-select options, and to determine the feasibility of meeting DOE targets. Specific objectives in Fiscal Year 2008 included: (1) Model various developmental hydrogen…
We have developed a mixed conducting samaria-doped ceria (SDC) cathode with highly dispersed Ni catalysts in a solid oxide electrolysis cell (SOEC) for efficient hydrogen production. The Ni-dispersed SDC cathode exhibited the highest performance at 17 vol %-Ni loading due to the effective enhancement of the reaction r…
The equilibrium between Ti and O has been investigated in molten Fe–Ti alloy saturated with various kinds of titanium oxides at 1873 K. The present results have been thermodynamically analyzed applying Wagner's formalism as well as Darken's quadratic formalism with the excess Gibbs free energy change of mixing describ…
Thermoelectric properties of ZrNiSn based half-Heusler compounds, Zr0.7X0.3NiSn (X=Ti, Hf), ZrNi0.7Y0.3Sn (Y=Pd, Pt), and ZrNi1.05Sn were investigated from room temperature to 1000 K. All the substitutions and addition of the excess nickel drastically decreased the thermal conductivity. The experimental values at room…