Dice Question Streamline Icon: https://streamlinehq.com

Presence of rapidly moving dislocations at α/β-PdHx phase boundaries during intercalation wave propagation

Ascertain whether rapidly moving dislocations are present at the α/β-PdHx phase boundaries during intercalation wave propagation in palladium nanocubes and determine their detectability under the current liquid-phase TEM experimental conditions.

Information Square Streamline Icon: https://streamlinehq.com

Background

Atomic-resolution HRTEM images and Bragg-filtered lattice analyses suggest coherent α/β-PdHx interfaces during hydrogen absorption in 14 × 16 nm and 19 × 21 nm Pd nanocubes. However, the temporal resolution and sensitivity of the current setup may miss fast-moving defects.

Dislocations at moving phase boundaries could influence mechanical equilibrium, interface coherence, and strain accommodation during the intercalation wave, making their existence and dynamics a critical unresolved aspect of the transformation mechanism.

References

While we cannot entirely exclude the possibility of rapidly moving dislocations at the interfaces, which may escape detection using our current experimental setup, the observations in Fig. 3 suggest the presence of a coherent phase boundary within the hydriding 14 × 16 nm Pd nanocube.

— Atomic evolution of hydrogen intercalation wave dynamics in palladium nanocrystals (2404.02416 - Lee et al., 3 Apr 2024) in Results and discussion, subsection 'Atomic evolution of hydrogen intercalation wave dynamics' (near Fig. 3)