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Related Concept Videos

X-ray Crystallography02:18

X-ray Crystallography

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The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
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X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
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Related Experiment Video

Updated: Jun 2, 2025

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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Convergent-beam attosecond x-ray crystallography.

Henry N Chapman, Chufeng Li1, Saša Bajt

  • 1Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.

Structural Dynamics (Melville, N.Y.)
|January 16, 2025
PubMed
Summary
This summary is machine-generated.

Observing molecular dynamics requires attosecond X-ray pulses and advanced crystallography. This study proposes using convergent-beam X-ray crystallography with hard X-ray free-electron lasers to achieve sub-femtosecond time resolution.

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Area of Science:

  • Chemical Physics
  • Materials Science
  • Quantum Mechanics

Background:

  • Observing ultrafast molecular dynamics requires sub-ångström spatial and sub-femtosecond temporal resolution.
  • Current methods limit the study of electronic structure dynamics after photoinitiation or X-ray perturbation.

Purpose of the Study:

  • To achieve attosecond timescale resolution in quantum crystallography.
  • To enable direct observation and control of coupled electronic and nuclear dynamics in molecules.

Main Methods:

  • Employing convergent-beam X-ray crystallography with high-power attosecond pulses from a hard-X-ray free-electron laser.
  • Utilizing dispersive optics, specifically multilayer Laue lenses, to encode time information into diffraction patterns.
  • Analyzing Bragg streaks in snapshot diffraction patterns to map X-ray arrival times and positions.

Main Results:

  • Demonstrated deep sub-femtosecond time precision in encoding time into diffraction patterns.
  • Showcased the ability to capture snapshots spanning tens of femtoseconds with fine temporal sampling.
  • Observed an increased number of reflections in snapshot diffraction patterns, enhancing serial crystallography.

Conclusions:

  • The proposed method enables unprecedented temporal resolution for studying molecular dynamics.
  • This technique advances quantum crystallography towards attosecond timescales.
  • Offers improved speed and accuracy for serial crystallography, particularly for small molecules.