SEARCH · Search NASA
Results for “DIAMONDS”
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Novel experimental setup for megahertz X-ray diffraction in a diamond anvil cell at the High Energy
Explore the source record for details and available documents.
Diamonds in the Rough: Direct Surface Enhanced Infrared Spectroscopic Evidence of Nitrogen Reduction on Boron-Doped Diamond Supported Metal Catalysts
In situ investigations of electrocatalytic processes of increasing societal interest such as the nitrogen reduction reaction (NRR) re-quire aggressive experimental conditions that are not readily compatible with surface sensitive techniques such as attenuated total reflection surface enhanced infrared absorption spectroscopy (ATR-SEIRAS). A method for performing ATR-SEIRAS studies at very negative potentials where conventional IR-active films delaminate, and fail is reported. The method relies on a thin film of very robust boron-doped diamond deposited on a micromachined Si wafer, which provides extended mid-IR transparency at long wavelengths. SEIRAS activity is achieved by electrodepositing gold nanoparticles onto the conductive BDD layer. The Au@BDD layers are shown to sustain prolonged periods of electrolysis at negative potentials with no degradation of the modifying layer. The efficacy of these substrates for electrocatalysis is demonstrated by studying the reduction of N 2 at -1.5 V vs Ag/AgCl in an aqueous-based electrolyte. So under these conditions, direct spectroscopic evidence of both NH 3 and hydrazine formed from the nitrogen reduction reaction (NRR) is provided.
Cinema:Snap: Real-time tools for analysis of dynamic diamond anvil cell experiment data
We report we developed tools and a workflow for real-time analysis of data from dynamic diamond anvil cell experiments performed at user light sources. These tools allow users to determine the phases of matter observed during the compression of materials in order to make decisions during an experiment to improve the quality of experimental results and maximize the use of scarce experimental facility time. The tools fill a gap in dynamic compression data analysis tools that are real-time, are flexible to the needs of high-pressure scientists, connect to automated processing of results, can be easily incorporated into workflows with existing tools and data formats, and support remote experimental data analysis workflows. Specific analytics developed include novel automated two-peak analysis for overlapping peaks and multiple phases, coordinated views of pressure and temperature values, full-compression contour plots, and configurable views of integrated x-ray diffraction. We present an experimental use case to show how the tools produce real-time analytics that help the scientists revise parameters for the next compression
Field Assisted Photoemission from Nanocrystalline Diamond and Diamond Field Emitter Arrays
Explore the source record for details and available documents.
Thermal and Electrical Properties of Diamond and Undoped Diamond Films
Explore the source record for details and available documents.
Mixing of carbonatitic into saline fluid during panda diamond formation
Not provided.
Large elastoplasticity under static megabar pressures: Formulation and application to compression of samples in diamond anvil cells
Explore the source record for details and available documents.
New test beam results of 3D and pad detectors constructed with poly-crystalline CVD diamond
Not provided.
Thermal equation of state of Molybdenum determined from in situ synchrotron X-ray diffraction with laser-heated diamond anvil cells
Abstract not provided
A New Boron Nitride and Graphite Composite Heater for Rapid Resistive Heating in the Diamond Anvil Cell and Dynamic Diamond Anvil Cell
Explore the source record for details and available documents.