We re-examine the classical problem of irreversible colloid aggregation, showing that the application of Digital Fourier Imaging (DFI), a class of optical correlation methods that combine the power of light scattering and imaging, allows one to pick out novel useful evidence concerning the restructuring processes taking place in a strong colloidal gel. In particular, the spatially-resolved displacement fields provided by DFI strongly suggest that the temporally-intermittent local rearrangements taking place in the course of gel ageing are characterized by very long-ranged spatial correlations.

Spatially: Resolved heterogeneous dynamics in a strong colloidal gel

BUZZACCARO, STEFANO;ALAIMO, MATTEO DAVID;SECCHI, ELEONORA;PIAZZA, ROBERTO
2015

Abstract

We re-examine the classical problem of irreversible colloid aggregation, showing that the application of Digital Fourier Imaging (DFI), a class of optical correlation methods that combine the power of light scattering and imaging, allows one to pick out novel useful evidence concerning the restructuring processes taking place in a strong colloidal gel. In particular, the spatially-resolved displacement fields provided by DFI strongly suggest that the temporally-intermittent local rearrangements taking place in the course of gel ageing are characterized by very long-ranged spatial correlations.
colloidal aggregation; correlation spectroscopy; digital microscopy; disordered solids; dynamic light scattering; gels; velocimetry; Condensed Matter Physics; Materials Science (all)
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/970473
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