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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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Tuning Oxygen Redox Reaction through the Inductive Effect with Proton Insertion in Li-Rich Oxides
As a parent compound of Li-rich electrodes, Li 2 MnO 3 exhibits high capacity during the initial charge; however, it suffers notoriously low Coulombic efficiency due to oxygen and surface activities. Here, we successfully optimize the oxygen activities toward reversible oxygen redox reactions by intentionally introducing protons into lithium octahedral vacancies in the Li 2 MnO 3 system with its original structural integrity maintained. Combining structural probes, theoretical calculations, and resonant inelastic X-ray scattering results, a moderate coupling between the introduced protons and lattice oxygen at the oxidized state is revealed, which stabilizes the oxygen activities during charging. Such a coupling leads to an unprecedented initial Coulombic efficiency (99.2%) with a greatly improved discharge capacity of 302 mAh g -1 in the protonated Li 2 MnO 3 electrodes. These findings directly demonstrate an effective concept for controlling oxygen activities in Li-rich systems, which is critical for developing high-energy cathodes in batteries.
Size-Controlled Synthesis of Iron and Iron Oxide Nanoparticles by the Rapid Inductive Heating Method
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Neonatal immunity associated with heterologous HIV-1 neutralizing antibody induction in SHIV-infected Rhesus Macaques
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Structural reorganization of the fungal endoplasmic reticulum upon induction of mycotoxin biosynthesis
Eukaryotic cells routinely compartmentalize metabolic pathways to particular organelles for biosynthetic purposes. Relatively few studies have addressed the cellular localization of pathways for secondary metabolites synthesis. In this study, the phytopathogenic fungus Fusarium graminearum reorganized its endoplasmic reticulum (ER) when triggered to produce mycotoxins, both in vitro and in planta. Fluorescence tagged biosynthetic proteins were found to co-localize with the modified ER as confirmed by co-fluorescence and co-purification with known ER proteins. Microscopy, cell sorting, and proteomics were applied in this FICUS collaborative effort.
Analysis of organic and high dissolved salt content solutions using inductively coupled plasma optical emission spectrometry
Quantification of analytes present in organic solvents or high salt content aqueous solutions using ICP-OES with minimal to no sample processing is desirable to improve analysis turnaround time and decrease sample cost.
High-speed photographic study of vaporclouds from wet droplets and the subsequent solid particles in an inductively coupled plasma
Horizontal ICP with large droplet cloud showing YO and neutral Y emission.
f-Block reactions of metal cations with carbon dioxide studied by inductively coupled plasma tandem mass spectrometry
The reaction rates of lanthanide and actinide cations with CO 2 are dictated by the crossing between the potential energy surface (PES) evolving from the ground state reactants (red) and the PES leading to the ground state products (green).
Direct, multielement determinations from cotton swipes via plate express microextraction coupled to an inductively coupled plasma mass spectrometer (μEx-ICP-MS)
Use of a microextraction device allows for ready sampling of solid substrates, such as cotton swipes, allowing transfer of sub-microgram quantities for multielement ICP-MS analysis.
Chiral induction at the nanoscale and spin selectivity in electron transmission in chiral methylated BEDT-TTF derivatives
Great efforts have been made in the last few decades to realize electronic devices based on organic molecules. A possible approach in this field is to exploit the chirality of organic molecules for the development of spintronic devices, an applicative way to implement the chiral-induced spin selectivity (CISS) effect. In this work we exploit enantiopure tetrathiafulvalene (TTF) derivatives as chiral inducers at the nanoscale. The aim is to make use of TTF's well-known and unique semiconducting properties, to be expressed in the fields of enantio-selectivity and the chiral-induced spin selectivity (CISS) effect. Further, the experimental results shown in this paper further demonstrate how chirality and spin are deeply interrelated, as foreseen within the CISS effect theory, paving the way for the application of TTF derivatives in the field of spintronics. In this work, we demonstrate that tetramethyl-bis(ethylenedithio)-tetrathiafulvalene (TM-BEDT-TTF) (1) behaves as an efficient spin filter, as evidenced by magneto-atomic force microscopy (mc-AFM) measurements. Additionally, it is shown to be effective in transferring chirality to CdS/CdSe core–shell nanoparticles, as inferred from the analysis of circularly resolved photoluminescence spectra. This makes 1 a promising candidate for a variety of applications, ranging from plasmonics to quantum computing.
Ultrafast preparation of ruthenium nanoparticle/molybdenum oxide/nitrogen-doped carbon nanocomposites by magnetic induction heating for efficient hydrogen evolution reaction
Synergetic interactions between ruthenium and molybdenum oxide weaken H adsorption on ruthenium active sites and hence enhance the electrocatalytic activity towards hydrogen evolution reaction.
An inductively coupled plasma tandem mass spectrometry investigation of the activation of methane by lanthanide cations
Lanthanide reactivity is limited by the energy required to access an electronic configuration with two unpaired non-f electrons.