Femtosecond-resolved imaging of a single-particle phase transition in energy-filtered ultrafast electron microscopy.

ABSTRACT: Using an energy filter in transmission electron microscopy has enabled elemental mapping at the atomic scale and improved the precision of structural determination by gating inelastic and elastic imaging electrons, respectively. Here, we use an energy filter in ultrafast electron microscopy to enhance the temporal resolution toward the domain of atomic motion. Visualizing transient structures with femtosecond temporal precision was achieved by selecting imaging electrons in a narrow energy distribution from dense chirped photoelectron packets with broad longitudinal momentum distributions and thus typically exhibiting picosecond durations. In this study, the heterogeneous ultrafast phase transitions of vanadium dioxide (VO₂) nanoparticles, a representative strongly correlated sy

SUBMITTER: Kim YJ 

PROVIDER: S-EPMC9882981 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature