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A Micropatterning Assay for Measuring Cell Chirality
Published on: March 11, 2022
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Chirality-assisted lateral momentum transfer for bidirectional enantioselective separation
Yuzhi Shi1,2, Tongtong Zhu3,4,5, Tianhang Zhang3
11School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049 China.
Light, Science & Applications
|April 28, 2020
Summary
Researchers demonstrate robust sorting of chiral particles using optical lateral forces. This breakthrough enables all-optical enantioselective separation of nanoscale chiral materials.
Area of Science:
- Optics and Photonics
- Nanotechnology
- Materials Science
Background:
- Chirality-dependent optical forces offer potential for enantioselective particle sorting.
- Previous experiments were limited to larger particles in the geometrical-optics regime.
Purpose of the Study:
- To demonstrate the first robust sorting of Mie-sized chiral particles using optical lateral forces.
- To investigate the underlying physical mechanisms of these forces for nanoscale chiral materials.
Main Methods:
- Utilizing a single linearly polarized laser beam to induce lateral optical forces.
- Experimenting with chiral particles at an air-water interface.
- Analyzing the influence of particle size, incident angle, and light polarization.
Main Results:
- Successfully sorted chiral particles with different handedness (Mie size regime).
- Identified novel physical interactions distinct from dipolar or geometrical-optics models.
- Demonstrated control over lateral force direction by adjusting experimental parameters.
Conclusions:
- Optical lateral forces can effectively sort nanoscale chiral particles.
- The findings pave the way for advanced enantioselective separation techniques in nanoscience and industry.
- The observed forces arise from complex light-particle interactions at the interface.
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