Publications by authors named "R W House"
Article Synopsis
- Core loss spectroscopies offer detailed insights into redox processes in Li-ion battery cathodes, necessitating precise interpretation of their spectral features, particularly the oxygen K-edge spectra of lithium transition-metal oxides (LiMO).
- Using density-functional theory (DFT), three exchange-correlation functionals were applied to simulate the spectra, with rSCAN showing a better alignment with experimental data compared to PBE and PBE +, especially for energies near the main edge.
- The study demonstrates that DFT can effectively link experimental spectroscopic signatures to theoretical models, revealing the impact of structural distortions, chemical composition, and magnetism on the differentiation of materials with similar structures and magnetic states.
Article Synopsis
- Ferroptosis is a type of cell death linked to lipid peroxidation and is being targeted in cancer treatment, emphasizing the importance of understanding its triggers.
- Despite lipid deprivation reducing the overall levels of polyunsaturated fatty acids (PUFAs) in cancer cells, these cells become more vulnerable to ferroptosis.
- The study reveals that when deprived of lipids, cancer cells activate a pathway that reallocates PUFAs from triglycerides to synthesize and accumulate specific PUFAs in phospholipids, thereby increasing their sensitivity to ferroptosis despite lower PUFA levels overall.
Article Synopsis
- * Research indicates that bulk redox occurs in LiNiO through Ni-O rehybridization without involving trapped molecular oxygen, which is linked to surface degradation.
- * Degradation is characterized by oxygen removal upon discharge and persistent nickel reduction, suggesting the need for effective surface stabilization to improve LiNiO performance.
Understanding Li ion diffusion pathways in Li-rich layered transition metal (TM) oxides is crucial for understanding the sluggish kinetics in anionic O redox. Although Li diffusion within the alkali layers undergoes a low-barrier octahedral-tetrahedral-octahedral pathway, it is less clear how Li diffuses in and out of the TM layers, particularly given the complex structural rearrangements that take place during the oxidation of O. Here, we develop simultaneous electron ptychography and annular dark field imaging methods to unlock the Li migration pathways in LiNiMnCoO associated with structural changes in the charge-discharge cycle.
View Article and Find Full Text PDFSummary: Measuring cellular energetics is essential to understanding a matrix's (e.g. cell, tissue, or biofluid) metabolic state.
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