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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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Glycopolymers Prepared by Alternating Ring-Opening Metathesis Polymerization Provide Access to Distinct, Multivalent Structures for the Probing of Biological Activity
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Selective Ring-Opening Allene Metathesis: Polymerization or Ruthenium Vinylidene Formation
Not provided.
Near-Field Spectroscopy of Individual Asymmetric Split-Ring Terahertz Resonators
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Engineered Biosynthesis and Anticancer Studies of Ring-Expanded Antimycin-Type Depsipeptides
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Anomalous electronic transport in high-mobility Corbino rings
We report low-temperature electronic transport measurements performed in two multi-terminal Corbino samples formed in GaAs/Al-GaAs two-dimensional electron gases (2DEG) with both ultra-high electron mobility ( ≳ 20 × 10 6 cm 2 / Vs) and with distinct electron density of 1.7 and 3.6 × 10 11 cm -2 . In both Corbino samples, a non-monotonic behavior is observed in the temperature dependence of the resistance below 1 K. Surprisingly, a sharp decrease in resistance is observed with increasing temperature in the sample with lower electron density, whereas an opposite behavior is observed in the sample with higher density. To investigate further, transport measurements were performed in large van der Pauw samples having identical heterostructures, and as expected they exhibit resistivity that is monotonic with temperature. Finally, we discuss the results in terms of various lengthscales leading to ballistic and hydrodynamic electronic transport, as well as a possible Gurzhi effect.
Heterogeneous III-V/Si micro-ring laser array with multi-state non-volatile memory for ternary content-addressable memories
Not provided.
Stabilization of hexazine rings in potassium polynitride at high pressure
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Small-molecule inhibitors targeting Polycomb repressive complex 1 RING domain
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Customisable X-ray fluorescence photodetector with submicron sensitivity using a ring array of silicon p-i-n diodes
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Mapping static core-holes and ring-currents with X-ray scattering
Quantum chemistry simulations in conjunction with scattering theory are used to demonstrate how static core-holes and attosecond valence electron currents manifest as measurable X-ray scattering modulations.