Non-brownian microrheology of a fluid-gel interface.
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.
Hobbie
E K
EK
Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Lin-Gibson
S
S
Kumar
S
S
D004058:Diffusion; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D005782:Gels / Q000737:chemistry*; D044085:Microfluidics / Q000379:methods*; D018715:Microscopy, Video; D011108:Polymers / Q000737:chemistry; D011409:Propylene Glycols / Q000737:chemistry; D012828:Silicones / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry; D013499:Surface Properties
D004129:Dimethylpolysiloxanes; D005782:Gels; D011108:Polymers; D011409:Propylene Glycols; D012828:Silicones; D012833:Siloxanes; C402373:poly(methylhydrosiloxane); C012504:polypropylene glycol; C013830:baysilon