The optical stretcher: a novel laser tool to micromanipulate cells.

@article{Guck2001TheOS,
  title={The optical stretcher: a novel laser tool to micromanipulate cells.},
  author={Jochen Guck and Revathi Ananthakrishnan and Hind K. Mahmood and Taeho Moon and Carol C. Cunningham and Josef K{\"a}s},
  journal={Biophysical journal},
  year={2001},
  volume={81 2},
  pages={767-84}
}
When a dielectric object is placed between two opposed, nonfocused laser beams, the total force acting on the object is zero but the surface forces are additive, thus leading to a stretching of the object along the axis of the beams. Using this principle, we have constructed a device, called an optical stretcher, that can be used to measure the viscoelastic properties of dielectric materials, including biologic materials such as cells, with the sensitivity necessary to distinguish even between… CONTINUE READING
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