AI Article Synopsis
- The study focuses on how oppositely charged colloidal particles form clusters, using numerical simulations based on Brownian dynamics and a Yukawa potential.
- It identifies an equilibrium phase where clusters coexist with unassociated particles, revealing that the number and shape of clusters are influenced by the particles' charge numbers and ratios.
- The research also establishes a phase diagram for cluster formations and shows that clusters can develop a multilayer structure when there's a high charge ratio, indicating dynamic changes in cluster-particle interactions during the formation process.
Article Abstract
Cluster formation of oppositely charged colloidal particles is studied numerically. A simple Brownian dynamics method with a screened-Coulomb (Yukawa) potential is employed for numerical simulations. An equilibrium phase which consists of clusters and unassociated particles is obtained. It is shown that the equilibrium association number of clusters and their shapes are determined by charge numbers and charge ratio of the binary particles. The phase diagram of cluster formation for various charge numbers and their ratios is obtained. A simple relation between the association number and the charge ratio is found. It is demonstrated that in the case of high charge ratio the cluster takes a multilayer structure which is highly symmetric. It is also pointed out that the cluster-particle interaction changes dynamically in the cluster formation process, which is involved in the selection of final cluster structure.
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| http://dx.doi.org/10.1103/PhysRevE.94.012609 | DOI Listing |
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