Engineering topics

Ren, Z.

Publications and source records attributed to Ren, Z..

5 records

DOE OSTI2023

Mapping the 3D position of battery cathode particles in Bragg coherent diffractive imaging

In Bragg coherent diffractive imaging, the precise location of the measured crystals in the interior of the sample is usually missing. Obtaining this information would help the study of the spatially dependent behavior of particles in the bulk of inhomogeneous samples, such as extra-thick battery cathodes. This work presents an approach to determine the 3D position of particles by precisely aligning them at the instrument axis of rotation. In the test experiment reported here, with a 60 µm-thick LiNi 0.5 Mn 1.5 O 4 battery cathode, the particles were located with a precision of 20 µm in the out-of-plane direction, and the in-plane coordinates were determined with a precision of 1 µm.

25 ENERGY STORAGE↗

DOE OSTI2022

Stable and Efficient Single-Atom Zn Catalyst for CO2 Reduction to CH4

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99 GENERAL AND MISCELLANEOUS↗

NASA NTRS1999

Chemical Bonding in TI Cuprates Studied by X-ray Photoemission

Epitaxial thin films of the TI cuprate superconductors are studied with x-ray photoemission spectroscopy.

Superconductors photoemission↗

NASA NTRS1999

Chemical Bonding in TI Cuprates Studied by X-ray Photoemission

The variation of E(sub f) with oxygen stoichiometry is detectable in rigid shifts of the photoemission core levels, as previously reported for TI-2201 and TI-1212.

high temperature superconductors photoemission↗

NASA NTRS1989

Mutants of Arabidopsis thaliana with decreased amplitude in their phototropic response

Two mutants of Arabidopsis thaliana have been identified with decreased phototropism to 450-nanometer light. Fluence-response relationships for these strains (ZR8 and ZR19) to single and multiple flashes of light show thresholds, curve shapes, and fluence for maximum curvature in first positive' phototropism which are the same as those of the wild type. Similarly, there is no alteration from the wild type in the kinetics of curvature or in the optimum dark period separating sequential flashes in a multiple flash regimen. In addition, in both strains, gravitropism is decreased compared to the wild type by an amount which is comparable to the decrease in phototropism. Based on reciprocal backcrosses, it appears that the alteration is due to a recessive nuclear mutation. It is suggested that ZR8 and ZR19 represent alterations in some step analogous to an amplifier, downstream of the photoreceptor pigment, and common to both phototropism and gravitropism.

NASA Discipline Number 29-20↗