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Tunable freezing in 2D PMMA colloids: Density functional theory of combined Yukawa–Hamaker interactions

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  • Bayen, Moushila
  • Biswas, Rohit
  • Mishra, Pankaj

Abstract

We have studied the freezing transition in two-dimensional polymethyl methacrylate (PMMA) colloidal monolayers in nonpolar solvents using a realistic DLVO-type potential that combines tunable Yukawa repulsion and Hamaker attraction, modulated by a mixing parameter ν. Pair correlation of the isotropic phase of the system is computed via Percus–Yevick integral equation theory and has been used in classical density functional theory to map fluid-triangular solid phase boundaries, revealing that higher temperatures or larger ν shift coexistence to elevated densities due to enhanced entropy and softened repulsion. These predictions align with experimental PMMA systems and highlight how solvent-mediated tuning of the interplay of Yukawa repulsion and Hamaker attraction controls crystallization in 2D colloidal assemblies.

Suggested Citation

  • Bayen, Moushila & Biswas, Rohit & Mishra, Pankaj, 2026. "Tunable freezing in 2D PMMA colloids: Density functional theory of combined Yukawa–Hamaker interactions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 694(C).
    • Handle: RePEc:eee:phsmap:v:694:y:2026:i:c:s0378437126003146
    DOI: 10.1016/j.physa.2026.131578
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