Two-Point Microrheology of Inhomogeneous Soft Materials

by: John C Crocker, MT Valentine, Eric R Weeks, T Gisler, PD Kaplan, AG Yodh, DA Weitz

Physical Review Letters, Vol. 85, No. 4. (24 July 2000), pp. 888-891.

View FullText article

DOI, PROLA (abstract), PROLA (pdf)

Reviews [Write a review of this article]

There are no reviews of this article

Find related articles from these CiteULike users

kedmond, pjkiley, kkims, weeks, dchen

Find related articles with these CiteULike tags

colloidal, diffusion, methods, microrheology, qualif3, two-point, weeks, weitz, yodh

摘要

We demonstrate a novel method for measuring the microrheology of soft viscoelastic media; based on cross correlating the thermal motion of pairs of embedded tracer particles. The method does not depend on the exact nature of the coupling between the tracers and the medium; and yields accurate rheological data for highly inhomogeneous materials. We demonstrate the accuracy of this method with a guar solution; for which other microscopic methods fail due to the polymer's mesoscopic inhomogeneity. Measurements in an F-actin solution suggest conventional microrheology measurements may not reflect the true bulk behavior.

@article{crocker00, abstract = {We demonstrate a novel method for measuring the microrheology of soft viscoelastic media; based on cross correlating the thermal motion of pairs of embedded tracer particles. The method does not depend on the exact nature of the coupling between the tracers and the medium; and yields accurate rheological data for highly inhomogeneous materials. We demonstrate the accuracy of this method with a guar solution; for which other microscopic methods fail due to the polymer's mesoscopic inhomogeneity. Measurements in an F-actin solution suggest conventional microrheology measurements may not reflect the true bulk behavior.}, author = {Crocker, John C. and Valentine, M. T. and Weeks, Eric R. and Gisler, T. and Kaplan, P. D. and Yodh, A. G. and Weitz, D. A. }, citeulike-article-id = {822942}, doi = {http://dx.doi.org/10.1103/PhysRevLett.85.888}, journal = {Physical Review Letters}, keywords = {methods, microrheology, two-point}, month = {July}, number = {4}, pages = {888--891}, posted-at = {2007-09-19 14:45:53}, priority = {0}, publisher = {American Physical Society}, title = {Two-Point Microrheology of Inhomogeneous Soft Materials}, url = {http://dx.doi.org/10.1103/PhysRevLett.85.888}, volume = {85}, year = {2000} }

RIS record

TY - JOUR ID - crocker00 L3 - citeulike-article-id:822942 N2 - We demonstrate a novel method for measuring the microrheology of soft viscoelastic media; based on cross correlating the thermal motion of pairs of embedded tracer particles. The method does not depend on the exact nature of the coupling between the tracers and the medium; and yields accurate rheological data for highly inhomogeneous materials. We demonstrate the accuracy of this method with a guar solution; for which other microscopic methods fail due to the polymer's mesoscopic inhomogeneity. Measurements in an F-actin solution suggest conventional microrheology measurements may not reflect the true bulk behavior. IS - 4 JF - Physical Review Letters EP - 891 TI - Two-Point Microrheology of Inhomogeneous Soft Materials PB - American Physical Society VL - 85 SP - 888 KW - methods KW - microrheology KW - two-point AU - Crocker, John AU - Valentine, MT AU - Weeks, Eric AU - Gisler, T AU - Kaplan, PD AU - Yodh, AG AU - Weitz, DA PY - 2000/07/24/ UR - http://dx.doi.org/10.1103/PhysRevLett.85.888 ER -

RIS BibTeX