Microrheology of cross-linked polyacrylamide networks.

  title={Microrheology of cross-linked polyacrylamide networks.},
  author={Bivash Ranjan Dasgupta and David A. Weitz},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  volume={71 2 Pt 1},
Experiments investigating the local viscoelastic properties of a chemically cross-linked polymer are performed on polyacrylamide solutions in the sol and the gel regimes using polystyrene beads of varying sizes and surface chemistry as probes. The thermal motions of the probes are measured to obtain the elastic and viscous moduli of the sample. Probe dynamics are measured using two different dynamic light scattering techniques, diffusing wave spectroscopy (DWS) and quasielastic light scattering… CONTINUE READING


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