Since the discovery of electron-wave duality, electron scattering instrumentation has
developed into a powerful array of techniques for revealing the atomic structure of matter …

▪ Abstract In this review, we highlight the progress made in the development of 4D ultrafast
electron diffraction (UED), crystallography (UEC), and microscopy (UEM) with a focus on …

We used 600-femtosecond electron pulses to study the structural evolution of aluminum as it
underwent an ultrafast laser–induced solid-liquid phase transition. Real-time observations …

The use of pump-probe experiments to study complex transient events has been an area of
significant interest in materials science, biology, and chemistry. While the emphasis has …

One of the grand challenges in chemistry has been to directly observe atomic motions
during chemical processes. The depiction of the nuclear configurations in space-time to …

A rf photocathode electron gun is used as an electron source for ultrafast time-resolved
pump-probe electron diffraction. The authors observed single-shot diffraction patterns from a …

We report direct determination of the structures and dynamics of interfacial water on a
hydrophilic surface with atomic-scale resolution using ultrafast electron crystallography. On …

Femtosecond electron diffraction (FED) has the potential to directly observe transition state
processes. The relevant motions for this barrier-crossing event occur on the hundred …

Ultrafast electron microscopy and diffraction are powerful techniques for the study of the time-
resolved structures of molecules, materials, and biological systems. Central to these …

In this contribution, we consider the advancement of ultrafast electron diffraction and
microscopy to cover the attosecond time domain. The concept is centered on the …