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Université de Fribourg

Monitoring spatially heterogeneous dynamics in a drying colloidal thin film

Zakharov, Pavel ; Scheffold, Frank

In: Soft Materials, 2010, vol. 8, no. 2, p. 102-113

We report on a new type of experiment that enables us to monitor spatially and temporally heterogeneous dynamic properties in complex fluids. Our approach is based on the analysis of near-field speckles produced by light diffusely reflected from the superficial volume of a strongly scattering medium. By periodic modulation of an incident speckle beam we obtain pixel-wise ensemble averages of the...