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An optically driven biological micromotor

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    physics/0501099 From: Deepak Mathur [view email] Date: Wed, 19 Jan 2005 10:08:23 GMT (393kb) Euler buckling in red blood cells: An optically driven
    Message 1 of 1 , Feb 1, 2005
      physics/0501099
      From: Deepak Mathur [view email]
      Date: Wed, 19 Jan 2005 10:08:23 GMT (393kb)

      Euler buckling in red blood cells: An optically driven biological
      micromotor
      Authors: A. Ghosh, S. Sinha, J. A. Dharmadhikari, S. Roy, A. K.
      Dharmadhikari, J. Samuel, S. Sharma, D. Mathur
      Subj-class: Biological Physics; Optics; Soft Condensed Matter

      We report the observation of an optically driven micromotor of
      biological origin. A single red blood cell (RBC) folds when placed
      in an optical trap. The folded RBC is birefringent and rotates in
      circularly polarized light. Optical forces permit a high degree of
      control over the speed and direction of rotation of such a
      micromotor. This cellular micromotor has potential applications in
      micromanipulation, possibly like an "optical screwdriver" to apply
      torques at the micron scale. A simple theoretical model captures the
      main observed features and makes predictions that are successfully
      tested.
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