Aggregation of colloidal particles with a finite interparticle attraction energy

Citation:

Shih, W. Y. ; Liu, J. ; Shih, W. H. ; Aksay, I. A. Aggregation of colloidal particles with a finite interparticle attraction energy. Journal of Statistical Physics 1991, 62, 961-984.

Date Published:

Mar

Type of Article:

Article

ISBN Number:

0022-4715

Accession Number:

WOS:A1991FE89600006

Abstract:

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 4k(B)T, where T is the temperature and k(B) 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.

Last updated on 07/02/2018