Particle tracking microrheology of complex fluids

T. G. Mason, K. Ganesan, J. H. Van Zanten, Denis Wirtz, Scot C Kuo

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Pages (from-to)3282-3285
Number of pages4
JournalPhysical Review Letters
Volume79
Issue number17
StatePublished - Oct 27 1997

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Einstein equations
photodiodes
polyethylenes
purity
deoxyribonucleic acid
trajectories
shear
oxides
probes
fluids
water
spectroscopy
lasers

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Mason, T. G., Ganesan, K., Van Zanten, J. H., Wirtz, D., & Kuo, S. C. (1997). Particle tracking microrheology of complex fluids. Physical Review Letters, 79(17), 3282-3285.

Particle tracking microrheology of complex fluids. / Mason, T. G.; Ganesan, K.; Van Zanten, J. H.; Wirtz, Denis; Kuo, Scot C.

In: Physical Review Letters, Vol. 79, No. 17, 27.10.1997, p. 3282-3285.

Research output: Contribution to journalArticle

Mason, TG, Ganesan, K, Van Zanten, JH, Wirtz, D & Kuo, SC 1997, 'Particle tracking microrheology of complex fluids', Physical Review Letters, vol. 79, no. 17, pp. 3282-3285.
Mason TG, Ganesan K, Van Zanten JH, Wirtz D, Kuo SC. Particle tracking microrheology of complex fluids. Physical Review Letters. 1997 Oct 27;79(17):3282-3285.
Mason, T. G. ; Ganesan, K. ; Van Zanten, J. H. ; Wirtz, Denis ; Kuo, Scot C. / Particle tracking microrheology of complex fluids. In: Physical Review Letters. 1997 ; Vol. 79, No. 17. pp. 3282-3285.
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