One of the great dream experiments in Science is to directly observe atomic motions as they
occur. Femtosecond electron diffraction provided the first'light'of sufficient intensity to …

▪ 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 ultrafast photoinduced ring-opening of 1, 3-cyclohexadiene constitutes a textbook
example of electrocyclic reactions in organic chemistry and a model for photobiological …

Simultaneous observation of nuclear and electronic motion is crucial for a complete
understanding of molecular dynamics in excited electronic states. It is challenging for a …

With the recent advances in ultrabright electron and x-ray sources, it is now possible to
extend crystallography to the femtosecond time domain to literally light up atomic motions …

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 …

Structural rearrangements within single molecules occur on ultrafast time scales. Many
aspects of molecular dynamics, such as the energy flow through excited states, have been …

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 …

With properly timed sequences of ultrafast electron pulses, it is now possible to image
complex molecular structures in the four dimensions of space and time with resolutions of …