Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Development of simple and reliable protocols for the synthesis of phase-pure core–shell metal nanoparticles is an important problem in nanomaterials synthesis; the synthesis of Au core–Pd/Pt shell nanoparticles is described in this paper. This is accomplished by utilizing Keggin ions bound to the surface of gold nanop…
Molecular dynamics simulations were used to calculate the thermal conductivity of carbon nanotubes and diamond nanowires with atomic interactions modeled by the Brenner potential. The dependence of thermal conductivity on length, temperature, and temperature “boundary” condition was investigated. Lengths from 50 nm to…
Ultrafine grained structure formed dynamically through a severe warm deformation in the temperature range from 773 K to 923 K has been investigated in a 0.16%C-0.4%Si-1.4%Mn steel. The effects of the deformation conditions such as deformation temperature and strain rate on microstructural evolution were examined using…
The shape-preserving conversion of biologically self-assembled 3-D nanoparticle structures (SiO(2)-based diatom frustules) into a new nanocrystalline material (anatase TiO(2))via a halide gas/solid displacement reaction route is demonstrated.
The formation and reactivity of surface intermediates in the reverse water-gas-shift reaction on a Pt/CeO2 catalyst are critically dependent on the reaction conditions so that conclusions regarding the reaction mechanism cannot be inferred using ex operando conditions.
AE 1. AE (1191). 2. AE (1193). 2.1. AE . 2.2. . 2.3. -AE . 3. AE (1200). 3.1. . 3.2. a . 3.3. . 3.4. , (). 4. AE (1213). 4.1. AEAE. 4.2. AE - AE . 5. (1228). (1229). 1. AE XX AE, AE , AE . AE AE -. - AE [1 3] , , AEAE . 1996 . [4 6]. AE AE AE (), AE 1991 . [7]. AE AE AE AE AE AE AE - AE - , -. ,
Nanometre-sized PEDOT-silica core-shell particles were synthesized and self-assembled into crystalline colloidal arrays with a reflection peak in the visible region; these particles were also etched with hydrofluoric acid to produce hollow PEDOT particles.
We determined the local atomic structure of MgO epilayers on Ag(001) by means of polarization-dependent x-ray absorption spectroscopy measurements at the Mg and O $K$ edges. A quantitative analysis of the data in the extended energy range has been performed using multiple scattering simulations. We found that, even in…
We consider a fully practical finite element approximation of the nonlinear degenerate parabolic system \begin{align} \gamma\,\textstyle{\frac{\partial u}{\partial t}} - \nabla . ( \,b(u) \,\nabla [ w +\alpha\,\phi]\, ) = 0\,, \quad w = - \gamma\, \Delta u + \gamma^{-1}\,\Psi'(u)\,, %\nonumber \\ \quad \nabla . (\, c(…
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…