Particle Tracking Microrheology of Complex Fluids

by: TG Mason, K Ganesan, JH van Zanten, D Wirtz, SC Kuo

Physical Review Letters, Vol. 79, No. 17. (27 October 1997), 3282.

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Abstract

We present a new method for measuring the linear viscoelastic shear moduli of complex fluids. Using photodiode detection of laser light scattered from a thermally excited colloidal probe sphere; we track its trajectory and extract the moduli using a frequency-dependent Stokes-Einstein equation. Spectra obtained for polyethylene oxide in water are in excellent agreement with those found mechanically and using diffusing wave spectroscopy. Since only minute sample volumes are required; this method is well suited for biomaterials of high purity; as we demonstrate with a concentrated DNA solution.

@article{citeulike:822246, abstract = {We present a new method for measuring the linear viscoelastic shear moduli of complex fluids. Using photodiode detection of laser light scattered from a thermally excited colloidal probe sphere; we track its trajectory and extract the moduli using a frequency-dependent Stokes-Einstein equation. Spectra obtained for polyethylene oxide in water are in excellent agreement with those found mechanically and using diffusing wave spectroscopy. Since only minute sample volumes are required; this method is well suited for biomaterials of high purity; as we demonstrate with a concentrated DNA solution.}, author = {Mason, T. G. and Ganesan, K. and van Zanten, J. H. and Wirtz, D. and Kuo, S. C. }, citeulike-article-id = {822246}, doi = {10.1103/PhysRevLett.79.3282}, journal = {Physical Review Letters}, keywords = {microrheology, particle-tracking}, month = {October}, number = {17}, pages = {3282+}, posted-at = {2007-09-29 03:41:17}, priority = {4}, publisher = {American Physical Society}, title = {Particle Tracking Microrheology of Complex Fluids}, url = {http://dx.doi.org/10.1103/PhysRevLett.79.3282}, volume = {79}, year = {1997} }

RIS record

TY - JOUR ID - citeulike:822246 L3 - citeulike-article-id:822246 TI - Particle Tracking Microrheology of Complex Fluids JF - Physical Review Letters VL - 79 IS - 17 SP - 3282 PB - American Physical Society N2 - We present a new method for measuring the linear viscoelastic shear moduli of complex fluids. Using photodiode detection of laser light scattered from a thermally excited colloidal probe sphere; we track its trajectory and extract the moduli using a frequency-dependent Stokes-Einstein equation. Spectra obtained for polyethylene oxide in water are in excellent agreement with those found mechanically and using diffusing wave spectroscopy. Since only minute sample volumes are required; this method is well suited for biomaterials of high purity; as we demonstrate with a concentrated DNA solution. KW - microrheology KW - particle-tracking AU - Mason, TG AU - Ganesan, K AU - van Zanten, JH AU - Wirtz, D AU - Kuo, SC PY - 1997/10/27/ UR - http://dx.doi.org/10.1103/PhysRevLett.79.3282 ER -

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