Materials Literature
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Several bismuth amides and a bismuth thioamidate compound were synthesized and characterized in order to find volatile bismuth precursors for atomic layer deposition (ALD) of oxide materials. Crystal structures of Bi(N(SiMe3)2)3 and Bi(SC(Me)NPri)3 are reported. Based on precursor characterization Bi(N(SiMe3)2)3 was s…
Noncovalently functionalized MWNTs with SDS were coated with ZnS layers by a simple in-situ synthetic method without causing a significant modification of energy states of the MWNTs. The coating layer was composed of ZnS nanoparticles with size of less than 4 nm.
Experiments at UC San Diego PISCES-B, in collaboration with EFDA, are investigating the influence of beryllium impurities on deuterium plasma erosion of graphite material. The experiments are designed to reduce uncertainties in the prediction of tritium retention in redeposited mixed-materials expected in future burni…
Unloaded microspheres were prepared from polyhydroxybutyrate (PHB) and polyhydroxybutyrate-co-valerate (PHB-HV) polymers using an oil-in-water emulsion solvent evaporation method. The study was conducted to evaluate how the polymer and some process parameters affect properties of the final microspheres such as particl…
The spray-induced mixing characteristics and thermal decomposition of aqueous urea solution into ammonia have been studied to design optimum sizes and geometries of the mixing chamber in SCR (Selective Catalytic Reduction) system. The cold flow tests about the urea-injection nozzle were performed to clarify the parame…
Single-chamber cells of two different types have been operated between 700 and 800°C in various methane-air mixtures. These cells are made mostly of conventional materials for solid oxide fuel cells (SOFCs), strontium-doped lanthanum manganite, yttria-stabilized zirconia (YSZ), and Ni-YSZ cermet. One type is electroly…
Rattle-type silica particles with metal cores, applicable to catalysts and metal/inorganic composite coating materials, were prepared by the pre-shell/post-core method that can control the size of metal cores inside silica capsules and exchange from metal cores into different ones with a metal displacement reaction.
Rapid, quantitative SERS analysis of nicotine at ppm/ppb levels has been carried out using stable and inexpensive polymer-encapsulated Ag nanoparticles (gel-colls). The strongest nicotine band (1030 cm(-1)) was measured against d(5)-pyridine internal standard (974 cm(-1)) which was introduced during preparation of the…
The formation of chromate conversion coatings (CCCs) on commercially pure Al (AA1050) during immersion in a chromic/hydrofluoric acid solution has been investigated. A film formation mechanism is proposed based on the combination of open circuit potential measurements and surface analysis techniques, such as Auger ele…
We have developed a high-performance cathode for solid oxide electrolysis cells (SOECs) for hydrogen production. Mixed conducting samaria-doped ceria (SDC) particles were employed in combination with highly dispersed Ni electrocatalysts. The Ni (8 vol %) dispersed SDC cathode exhibited very high performance at a water…
microscopy, crystallography This paper discusses the results of a 3-day short course in spindle stage techniques recently offered at the McCrone Research Institute. The 14 students enrolled had levels of experience with spindle stage and optical crystallography which varied from novice to expert, but all were soon abl…
Typically, the debonding and sliding interface enabling fiber pullout for SiC‐fiber‐reinforced SiC‐matrix composites with BN‐based interphases occurs between the fiber and the interphase. Recently, composites have been fabricated where interface debonding and sliding occur between the BN interphase and the matrix. Thi…
The recent finding that radio frequency plasma activation of CH(4)/PH(3) gas mixtures can yield films with P : C ratios < or = 3 has served to trigger further research into new 'phosphorus carbide' materials. Theoretical and experimental results relating to periodic and amorphous materials, respectively, are presented…
Low temperature CO adsorption on a Pd-H-ZSM-5 sample results in formation of Pd3+(CO)2 species (2221 and 2200 cm−1). The dicarbonyl structure has been proven by coadsorption of 12CO and 13CO: mixed Pd3+(13CO)(12CO) species absorb at 2210 and 2158 cm−1. Evacuation of the sample at increasing temperatures leads to reduc…
A series of novel lanthanide polyoxomolybdates was synthesized by reaction of lanthanide cations with the Anderson type anion (TeMo(6)O(24))(6-). The polyoxometalates K(6n)(TeMo(6)O(24))(n)[(Ln(H(2)O)(7))(2)(TeMo(6)O(24))](n)[middle dot]16nH(2)O (Ln = Eu, Gd) and K(3n)[Ln(H(2)O)(5)(TeMo(6)O(24))](n)[middle dot]6nH(2)O…
Carbon nanotubes have been synthesised by catalytic chemical vapour deposition of a H2–CH4 mixture (18 mol% CH4) over (Mg,Co,Mo)O catalysts. The total amount of cobalt and molybdenum has been kept constant at 1 cat% and the proportion of molybdenum with respect to cobalt has been varied from x(Mo) = 0.25–1.0. This var…
Biomineralization leads to the formation of inorganic crystals with unique, ordered, refined shapes that are regulated by specific macromolecules. This process has been a source of inspiration for exploring novel approaches to the fabrication of inorganic-based surfaces and interfaces. Among those macromolecules, sulf…
Bubble nucleation sites in beer glasses should be uniformly small to ensure that the foam produced comprises homogenously small bubbles with attendant reduced degrees of disproportionation. The latter phenomenon is also hindered by increased film thickness in foam, which in turn will be enhanced by increased localised…
The electrochemical properties of the interface between Ni and yttria-stabilized zirconia (YSZ) in the H 2 H 2 O Ni YSZ electrode have been investigated in order to obtain knowledge on the effect of segregation of impurities to the electrode-electrolyte interface on performance. Even for a relatively pure nickel…
This paper proposes a simple, practical PSPICE model of a three-phase, three-legged, saturated transformer with accurate performance. The transformer is modeled with its electric and magnetic equivalent circuits and a simple but reliable characterization of its nonlinear magnetic behavior. Two three-phase transformers…