We study the kinetics of an aggregation process induced by adding salt to a stable colloidal suspension of 73 nm (diameter) particles. Despite the subdiffraction size of the colloidal particles, the process is monitored via optical microscopy, which is used here to obtain time-resolved scattering information about the colloidal aggregates. The radius of the aggregates is determined as a function of time and their fractal dimension is extracted. Our results are compatible with a diffusion limited aggregation process, as independently confirmed by spectral turbidimetry measurements on the same sample. © 2011 EDP Sciences and Springer.

Kinetics of colloidal fractal aggregation by differential dynamic microscopy

Ferri F.;
2011

Abstract

We study the kinetics of an aggregation process induced by adding salt to a stable colloidal suspension of 73 nm (diameter) particles. Despite the subdiffraction size of the colloidal particles, the process is monitored via optical microscopy, which is used here to obtain time-resolved scattering information about the colloidal aggregates. The radius of the aggregates is determined as a function of time and their fractal dimension is extracted. Our results are compatible with a diffusion limited aggregation process, as independently confirmed by spectral turbidimetry measurements on the same sample. © 2011 EDP Sciences and Springer.
Ferri, F.; D'Angelo, A.; Lee, M.; Lotti, A.; Pigazzini, M. C.; Singh, K.; Cerbino, R.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11383/1792319
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