Microrheology from Rotational Diffusion of Colloidal Particles

by: Efren A Reyes, Pedro D Leyva, Jose

Physical Review Letters, Vol. 94, No. 10. (2005)

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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.

@article{citeulike:1305143, 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.}, author = {Reyes, Efren A. and Leyva, Pedro D. and Jose}, citeulike-article-id = {1305143}, doi = {10.1103/PhysRevLett.94.106001}, journal = {Physical Review Letters}, keywords = {colloids, diffusion, microrheology, rotation}, number = {10}, posted-at = {2008-04-28 20:26:04}, priority = {2}, publisher = {APS}, title = {Microrheology from Rotational Diffusion of Colloidal Particles}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000094000010106001000001\&idtype=cvips\&gifs=yes}, volume = {94}, year = {2005} }

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TY - JOUR ID - citeulike:1305143 L3 - citeulike-article-id:1305143 TI - Microrheology from Rotational Diffusion of Colloidal Particles JF - Physical Review Letters VL - 94 IS - 10 PB - APS N2 - 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. KW - colloids KW - diffusion KW - microrheology KW - rotation AU - Reyes, Efren AU - Leyva, Pedro AU - Jose PY - 2005/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000094000010106001000001&idtype=cvips&gifs=yes ER -

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