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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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UV-vis polarized visible attenuated total reflectance (p-ATR) and Förster Resonance Energy Transfer (FRET) measurements are used to determine the orientation of molecules in metal ion linked multilayers.
ABSTRACT Ten soil cores were collected from the long-term heavy metal-contaminated Savannah River Site (SRS) and studied using shotgun metagenomics. In-line with our previous reports, Bradyrhizobium spp. dominated the SRS soils, and thus we recommend that SRS bioremediation studies target the Bradyrhizobium genus.
This final report summarizes the research conducted under project DE SC0019992, a multi-institution collaboration between the University of California, Berkeley, and Lawrence Berkeley National Laboratory. The overarching goal of the project was to develop a fundamental understanding of the thermodynamic and kinetic factors governing selective gas uptake in metal–organic frameworks (MOFs), with the long-term aim of enabling the rational design of next-generation adsorbents for energy-efficient separations.
This is the final report for this project. The long-term objective of our project is to develop a general molecular-level picture of the surface chemistry associated with ALD processes. Our central hypothesis is that the chemistry of ALD precursors can differ significantly from that seen in solution. Awareness of such differences should provide general guidelines on what to watch for when synthesizing new ALD precursors and designing and optimizing new ALD processes, especially in terms of minimizing the incorporation of impurities in the growing films and of carrying out depositions under mild pressure and temperature conditions. The main objective of our research project has been to advance the fundamental knowledge of the surface chemistry of ALD precursors needed for the design and optimization of film deposition processes. A modern surface-science approach has been implemented to both elucidate the mechanism of the reactions of the precursors on the surface and characterize the composition and morphology of the growing films. In general, emphasis is being placed on: • Identifying the primary reactions that may lead to the deposition of clean films; •Identifying the secondary reactions that may help the ALD process, by, for instance, helping with the reduction (or oxidation) of the metal atom; • Identifying the secondary reactions that may lead to the deposition of undesirable impurities in the growing films; • Determining the kinetic parameters of the relevant surface reactions in order to define the optimum conditions for film deposition and to minimize impurity deposition. • Characterizing the nature of the resulting films, with focus on their stoichiometry and on the final oxidation states of the constituent elements; and • Using the information obtained to propose better precursors for given ALD processes.
Critical angle technique for measuring index of refraction of metals that have an index less than unity in extreme ultraviolet
Platinum and palladium distribution in iron meteorites and ordinary chondrite metal phase spectrographically determined
Metal boot splices hard sheathed instrumentation cables used with high temperature strain gages and thermocouples. Silver brazing the conductors together, hermetically seals the splice. This boot is a highly reliable sealed splice which is equally effective at cryogenic temperatures, high temperatures, nuclear environments, and combinations of the above.
Fabrication processes for producing refractory metal alloy wire
Physical and mechanical properties of rhenium, technetium, hafnium, noble metals, and related alloys reviewed in terms of availability and costs
Adhesive properties of metal, glass, ceramic, polymer, and mineral combinations in ultrahigh vacuum
Compatibility of refractory metals with liquid Hg, Cs, K, Na and Li, noting resistance to corrosion
Metal-nonmetal transition in n- and p-type Si from high magnetic field galvanometric measurements, noting abnormally large magnetoresistance accompanied by Hall coefficient increase
Etchant containing chloroplatinous or chloroplatinic acid greatly reduces contact resistance between metallic surfaces. Etching results in a monolayer plating of platinum on the wafer surface, preventing oxide growth.
Refractory metal alloys metallurgy and technology - Conference, Washington, D.C., April 1968
Weldability and thermal stability of refractory metal alloys
Effect of oxygen contamination on weldability of refractory metal alloys
Long-time temperature stability of refractory metal alloys and weldability determinations
Production of small diameter refractory metal alloy wires for superalloy reinforcement