abstract

• The microrheology of viscoelastic fluids is obtained from rotational diffusion of optically anisotropic spherical colloidal probes, measured by depolarized dynamic light scattering. The storage and loss moduli obtained from the rotational mean squared displacement is in excellent agreement with those obtained from translational diffusion and by mechanical measurements. We also show that this method is applicable to samples with strong light scattering components. This extends the capabilities of the microrheological methods based on the diffusional motion of colloidal probes. © 2005 The American Physical Society.

authors

• Andablo-Reyes E.
• Arauz Lara Bernardo José Luis
• Díaz-Leyva P.

publication date

• 2005-01-01

published in

• Physical Review Letters  Journal

keywords

• Microrheology; Rotational diffusion; Stokes-Einstein relation; Viscoelastic fluids; Diffusion; Elastic moduli; Emulsification; Fourier transforms; Light scattering; Rheology; Viscoelasticity; Colloids

Digital Object Identifier (DOI)

• 10.1103/PhysRevLett.94.106001

start page

end page

volume

• 94

issue

• 10