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Abstract
A critical aspect of the behavior of dispersed particles is their stability. In applications such as the production of lattices, toner manufacturing, and biological processes such as blood typing that is essential to control the stability of suspension. The most significant characteristics of colloidal dispersions are the particle size distribution, particle shape, and chemical composition. In real aggregation processes, the characteristics of the aggregates will vary as a function of the state of the system. Therefore, a convenient and precise method is needed to enable irregular aggregates to be characterized. The main focus of this work is the development of a multiwavelength spectrophotometric method for obtaining a relationship between the aggregation kinetics and the physical behavior of systems containing aggregates. A scattering model based on Mie Theory integrated with the fractal description of particle aggregates is presented. It is shown that the spectroscopy of clusters is very sensitive to the value of the fractal dimension. To validate the aggregation model, particle aggregation studies under a variety of experimental conditions have been conducted and are reported herein. The evolution of particle size distribution was measured continuously using ultraviolet‐visible (UV‐VIS) spectroscopy. The model agrees well with the experimental results over the size range of 0.1–1.5 µ for perikinetic collision mechanisms.