Non-brownian microrheology of a fluid-gel interface

E. K. Hobbie, S. Lin-Gibson, S. Kumar

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We use stroboscopic video microscopy to study the motion of a sheared fluid-gel interface. Mechanical noise plays a role analogous to temperature, but with a low-frequency breakdown of linear response consistent with an underlying instability. We relate the fast motion of the interface to the rheological properties of the gel, laying the foundation for a non-Brownian optical microrheology.

Original languageEnglish (US)
Article number076001
JournalPhysical Review Letters
Issue number7
StatePublished - Feb 20 2008

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