Single polymer dynamics in an elongational flow.

  title={Single polymer dynamics in an elongational flow.},
  author={T. Perkins and D. Smith and S. Chu},
  volume={276 5321},
The stretching of individual polymers in a spatially homogeneous velocity gradient was observed through use of fluorescently labeled DNA molecules. The probability distribution of molecular extension was determined as a function of time and strain rate. Although some molecules reached steady state, the average extension did not, even after a approximately 300-fold distortion of the underlying fluid element. At the highest strain rates, distinct conformational shapes with differing dynamics were… Expand

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