Difference between revisions of "Microrheology"
From Soft-Matter
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== Definition == | == Definition == | ||
| − | Microrheology is a form of [http://en.wikipedia.org/wiki/Rheology rheology] | + | Microrheology is a form of [http://en.wikipedia.org/wiki/Rheology rheology] in which the properties of a complex fluid are measured with microscopic spatial precision by tracking the movement of a small, micron-sized, particle embedded in the fluid. |
== Passive Microrheology == | == Passive Microrheology == | ||
| + | In passive microrheology, Brownian motion of the particle due to thermal energy is observed. The viscoelastic modulus of a complex fluid (<math>G(\omega)</math>) can be determined from the mean square displacement <math>\<\delta r^2\></math> of the tracer particle undergoing thermal motion. Mason and Weitz showed that | ||
== Active Microrheology == | == Active Microrheology == | ||
Revision as of 14:34, 16 September 2009
Original Entry: Ian Burgess, Fall 2009 (currently under construction)
Definition
Microrheology is a form of rheology in which the properties of a complex fluid are measured with microscopic spatial precision by tracking the movement of a small, micron-sized, particle embedded in the fluid.
Passive Microrheology
In passive microrheology, Brownian motion of the particle due to thermal energy is observed. The viscoelastic modulus of a complex fluid (<math>G(\omega)</math>) can be determined from the mean square displacement <math>\<\delta r^2\></math> of the tracer particle undergoing thermal motion. Mason and Weitz showed that
