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Optical Trap Loading of Dielectric Microparticles In Air
Published on: February 5, 2017
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Optical Trap Loading of Dielectric Microparticles In Air.
Haesung Park1, Thomas W LeBrun2
1Physical Measurement Laboratory, National Institute of Standards and Technology.
Journal of Visualized Experiments : Jove
|February 13, 2017
Summary
This study presents a novel method for selectively trapping dielectric microparticles in air using optical tweezers. This technique allows for controlled manipulation and measurement of individual microparticles, advancing studies in particle-surface interactions.
Area of Science:
- Physics
- Optical trapping
- Microparticle manipulation
Background:
- Optical traps are crucial for manipulating microparticles.
- Selective trapping of microparticles in air presents challenges.
Purpose of the Study:
- To demonstrate a method for selective optical trap loading of dielectric microparticles in air.
- To outline a detailed experimental protocol for this technique.
Main Methods:
- Utilizing a single-beam gradient optical trap and radiation pressure.
- Employing ultrasonic vibrations from a piezoelectric transducer (PZT) to detach microparticles.
- Using electrostatic force for particle manipulation and charge measurement within the trap.
Main Results:
- Successfully trapped selected dielectric microparticles in air.
- Demonstrated controlled placement of trapped particles.
- Recorded particle trajectories for Brownian and ballistic motion analysis.
Conclusions:
- The developed method enables selective and reversible optical trap loading.
- This technique facilitates precise studies of particle-surface interactions and optical alignment verification.
