Aggregation of colloidal particles with a finite interparticle attraction energy

Wan Y. Shih, Jun Liu, Wei Heng Shih, Ilhan A. Aksay

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Aggregation of colloidal particles with a finite attraction energy was investigated with computer simulations and with gold particles coated with a surfactant. Computer simulations were carried out with the Shih-Aksay-Kikuchi (SAK) model, which incorporates a finite nearest-neighbor attraction energy-E into the diffusion-limited-cluster-aggregation (DLCA) model. Both the computer simulations and the experiments showed that (i) with a finite interparticle attraction energy, aggregates can still remain fractal, and (ii) the fractal dimension remains unchanged at large interparticle attraction energies and increases when the interparticle attraction energy is smaller than 4 kBT where T is the temperature and KB is the Boltzmann constant. The agreement between the simulations and the experimental results suggests that the reversible aggregation process in a colloidal system can be represented by the SAK model.

Original languageEnglish (US)
Pages (from-to)961-984
Number of pages24
JournalJournal of Statistical Physics
Issue number5-6
StatePublished - Mar 1991

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Mathematical Physics


  • Aggregation
  • colloid


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