Optical Tweezers

Optical tweezers are a scientific instruments that uses a focused laser beam to provide an attractive or repulsive force, depending on the index mismatch (typically on the order of piconewtons) to physically hold and move microscopic dielectric objects. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.

The optical tweezers use a focused laser beam to trap, move and position single cells or sub-cellular and microscopic particles in a size range of approximately 0.1 micro – 200 micro.

More information about optical tweezers on wikipedia.org

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