X-ray nanotomography using near-field ptychography

Area of Science:

• Materials Science
• Physics
• Nanotechnology

Background:

• Propagation-based imaging and holotomography are powerful for 3D nano-structure analysis.
• Phase retrieval in tomography is challenging for strongly absorbing or refracting samples.
• Near-field ptychography effectively addresses phase retrieval issues in projection data.

Purpose of the Study:

• To extend near-field ptychography into three dimensions.
• To apply 3D near-field ptychography to analyze the nano-structure of a solid oxide fuel cell (SOFC).
• To compare the performance of 3D near-field ptychography with conventional holotomography.

Main Methods:

• Development and application of three-dimensional near-field ptychography.
• Integration with computed tomography for tomographic reconstruction.
• Comparative analysis of imaging quality and extracted structural properties.

Main Results:

• Successful application of 3D near-field ptychography to visualize the nano-structure of an SOFC anode.
• Demonstrated superior or comparable quality of tomographic data compared to holotomography.
• Provided detailed structural insights into the SOFC anode material.

Conclusions:

• 3D near-field ptychography is a robust method for nano-scale structural investigations.
• This technique overcomes limitations of traditional methods for challenging samples.
• Significant potential for applications in materials science, life sciences, and beyond.