Atomic-Resolution Imaging of Fast Nanoscale Dynamics with Bright Microsecond Electron Pulses

Area of Science:

• Materials Science
• Physics
• Chemistry

Background:

• Atomic-resolution electron microscopy is vital for understanding material structures.
• Advancements in fast cameras enable time-resolved imaging, capturing atomic dynamics.
• The potential of short electron pulses for atomic-resolution imaging is unexplored.

Purpose of the Study:

• To investigate the feasibility of using microsecond electron pulses for atomic-resolution electron microscopy.
• To assess the capability of this technique in handling significant sample drift.
• To observe atomic-scale dynamics on the microsecond timescale.

Main Methods:

• Generation of high-brightness microsecond electron pulses from a Schottky emitter.
• Application of drift-corrected imaging techniques with these electron pulses.
• Utilizing the technique to study crystallization and high-temperature transformations.

Main Results:

• Achieved atomic resolution imaging with microsecond electron pulses, even with substantial sample drift.
• Demonstrated superior performance compared to continuous electron beams in drift compensation.
• Enabled atomic-resolution observations of metal nanoparticle crystallization and perovskite nanocrystal transformations on the microsecond scale.

Conclusions:

• Microsecond electron pulses are a viable tool for high-resolution electron microscopy.
• This technique overcomes limitations of sample drift and extends temporal resolution.
• Opens new avenues for observing ultrafast atomic-scale phenomena in materials.