Flocculation and percolation in reversible cluster-cluster aggregation

The European Physical Journal. E, Soft Matter
Sujin BabuD Durand

Abstract

Off-lattice dynamic Monte-Carlo simulations were done of reversible cluster-cluster aggregation for spheres that form rigid bonds at contact. The equilibrium properties were found to be determined by the life time of encounters between two particles (te). te is a function not only of the probability to form or break a bond, but also of the elementary step size of the Brownian motion of the particles. In the flocculation regime the fractal dimension of the clusters is df=2.0 and the size distribution has a power law decay with exponent tau=1.5. At larger values of te transient gels are formed. Close to the percolation threshold the clusters have a fractal dimension df=2.7 and the power law exponent of the size distribution is tau=2.1. The transition between flocculation and percolation occurs at a characteristic weight average aggregation number that decreases with increasing volume fraction.

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Citations

Jun 25, 2009·The European Physical Journal. E, Soft Matter·D TruzzolilloC Cametti
Dec 3, 2008·The Journal of Chemical Physics·G OdriozolaM Lozada-Cassou
Aug 11, 2007·The Journal of Chemical Physics·Sujin BabuTaco Nicolai
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Jan 17, 2020·Scientific Reports·Erzsébet Bartolák-Suki, Béla Suki
Aug 15, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·S M MortuzaSoumik Banerjee
Aug 4, 2021·Journal of the American Chemical Society·Vincent MarichezThomas M Hermans
Apr 28, 2007·The Journal of Physical Chemistry. B·Antonio M Puertas, Gerardo Odriozola

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