Convergent-beam X-ray crystallography

Area of Science:

• Materials Science
• Crystallography
• X-ray Optics

Background:

• Molecular and polymeric crystals exhibit properties dependent on atomic and macroscopic structures.
• X-ray diffraction typically analyzes either molecular or crystal structure, not both simultaneously.
• Crystal inhomogeneities and morphology can limit structural accuracy and understanding.

Purpose of the Study:

• To develop a method for spatially resolved structural analysis of crystals.
• To integrate molecular and crystal structure analysis with high resolution.
• To account for crystal morphology in structure factor determination.

Main Methods:

• Utilizing X-ray convergent-beam diffraction.
• Employing highly focusing X-ray multilayer Laue lenses.
• Mapping Bragg reflections into tomographic images for projection topographic imaging.

Main Results:

• Achieved spatially resolved structural information from crystals.
• Enabled high-resolution characterization of strain and defects.
• Demonstrated accounting for crystal morphology in structure factor analysis.

Conclusions:

• X-ray convergent-beam diffraction provides a novel approach for comprehensive crystal characterization.
• This method enhances understanding of crystal structure-property relationships.
• Potential applications include studying diffusion, binding, crystal growth, and dynamic crystal responses.