A bidimensional simulation of particle-cluster aggregation with variable active sites particles |
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Authors: | M G Bertoluzzo S M Bertoluzzo J A Luisetti C A Gatti |
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Institution: | (1) Facultad de Ciencias Bioquimicas Y Farmaceuticas Departamento de Quimica-Fisica Suipacha 531 2000 Rosario Argentina, AR |
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Abstract: | In this work a simple program has been developed which simulates the process of particle– cluster aggregation limited by
diffusion. All the simulation have been carried out using 2d square lattices with square “particles” having a variable number
of active inter-action sites (from 3 to 8) for each particle in order to analyze the effect of such limitation on the fractal
dimension of the aggregates. The fractal dimension of such aggregates was calculated by the so-called “box counting” method.
It has been shown that there is no change in the value of the fractal dimension (1.70) as the active site number is increased.
Instead it appears that there is an average number of active sites of about 2.3 for all the structures no matter how many
active interaction sites the particles have. This appears as an interesting result in connection with the aggregation of particles
such as renneted casein micelles, which could present differences in the surface density of active sites.
Received: 11 February 1997 Accepted: 8 January 1998 |
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Keywords: | DLA simulation colloidal aggregation active sites fractal dimension |
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