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Non-Brownian Microrheology of a Fluid Gel Interface



Erik K. Hobbie, Sheng Lin-Gibson, S K. Kumar


We use stroboscopic video microscopy to study the motion of a sheared fluid-gel interface. External 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.
Physical Review Letters


fluid-gel interface, non-Brownian, optical microrheology


Hobbie, E. , Lin-Gibson, S. and Kumar, S. (2008), Non-Brownian Microrheology of a Fluid Gel Interface, Physical Review Letters, [online], (Accessed July 14, 2024)


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Created February 20, 2008, Updated February 19, 2017