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Updated: Jul 6, 2026

Combining Microfluidics and Microrheology to Determine Rheological Properties of Soft Matter during Repeated Phase Transitions
Published on: April 19, 2018
Non-brownian microrheology of a fluid-gel interface
E K Hobbie1, S Lin-Gibson, S Kumar
1Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Abstract:
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.
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