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.;
2011-01-01

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.
2011
Ferri, F.; D'Angelo, A.; Lee, M.; Lotti, A.; Pigazzini, M. C.; Singh, K.; Cerbino, R.
File in questo prodotto:
File Dimensione Formato  
EPJ-ST_2011 - Cerbino.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: DRM non definito
Dimensione 691.97 kB
Formato Adobe PDF
691.97 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/1792319
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 31
  • ???jsp.display-item.citation.isi??? 31
social impact