The optical stretcher as a tool for single-particle X-ray imaging and diffraction

Area of Science:

• Biophysics
• Optical Physics
• Biotechnology

Background:

• Optical tweezers are established tools for micromanipulation.
• Optical stretchers, using opposing laser beams, offer enhanced force application for studying cell elasticity.
• Advancements in laser-based manipulation are crucial for high-resolution biological studies.

Purpose of the Study:

• To demonstrate the experimental capabilities of an optical stretcher as a sample delivery system for X-ray diffraction and imaging.
• To highlight the micromanipulation potential of optical stretchers for biological samples.
• To explore the integration of optical stretching with synchrotron and X-ray free-electron laser (FEL) facilities.

Main Methods:

• Utilized a commercially available optical stretcher system for sample manipulation.
• Applied optical stretching to image polymer beads and label biological cells.
• Recorded X-ray holograms from multiple views of biological cells using the optical stretcher setup.

Main Results:

• Successfully reconstructed the three-dimensional phase of a biological cell.
• Demonstrated the capability to deform cells at high laser intensities.
• Showcased X-ray hologram recording from different views of a biological cell, even in a non-optimized configuration.

Conclusions:

• The optical stretcher is a viable tool for X-ray diffraction and imaging studies at synchrotrons and X-ray FELs.
• Combining optical stretching with X-ray techniques can link structural parameters to elastic properties.
• High-throughput screening using optical stretchers could significantly advance X-ray-based biological research.