Shape separation of gold nanorods using centrifugation.

  title={Shape separation of gold nanorods using centrifugation.},
  author={Vivek Sharma and Kyoungweon Park and Mohan Srinivasarao},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={106 13},
We demonstrate the use of centrifugation for efficient separation of colloidal gold nanorods from a mixture of nanorods and nanospheres. We elucidate the hydrodynamic behavior of nanoparticles of various shapes and illustrate that the shape-dependent drag causes particles to have shape-dependent sedimentation behavior. During centrifugation, nanoparticles undergo Brownian motion under an external field and move with different sedimentation velocities dictated by their Svedberg coefficients… CONTINUE READING
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