Optically-controllable, micron-sized motor based on live cells.

  title={Optically-controllable, micron-sized motor based on live cells.},
  author={Mohanram Gudipati and Jimson D'Souza and Jayashree A. Dharmadhikari and A. K. Dharmadhikari and B. Jagadiswara Rao and Deepak Mathur},
  journal={Optics express},
  volume={13 5},
We demonstrate rotation of live Chlamydomonas reinhardtii cells in an optical trap; the speed and direction of rotation are amenable to control by varying the optical trapping force. Cells rotate with a frequency of 60-100 rpm; functional flagella are shown to play a decisive role in rotation. The rotating cells generate torque (typically ~7500-12000 pN nm) that is much larger than that generated chemically by a dynein head in vitro (40 pN nm). The total force associated with a rotating live… CONTINUE READING