Phase separation dynamics in a symmetric binary mixture of ultrasoft particles
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866917621698396160 |
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| author | Biswas, Tanmay Kahl, Gerhard Shrivastav, Gaurav P. |
| author_facet | Biswas, Tanmay Kahl, Gerhard Shrivastav, Gaurav P. |
| contents | Phase separation plays an role in determining the self-assembly of biological and soft-matter systems. In biological systems, liquid-liquid phase separation inside a cell leads to the formation of various macromolecular aggregates. The interaction among these aggregates is soft, i.e., these can significantly overlap at a small energy cost. From the computer simulation point of view, these complex macromolecular aggregates are generally modeled by the so-called soft particles. The effective interaction between two particles is defined via the generalized exponential potential (GEM-n) with n = 4. Here, using molecular dynamics simulations, we study the phase separation dynamics of a size-symmetric binary mixture of ultrasoft particles. We find that when the mixture is quenched to a lower temperature below the critical temperature, the two components spontaneously start to separate. Domains of the two components form, and the equal-time order parameter reveals that the domains grow in a power-law manner with exponent 1/3, which is consistent with the Lifshitz-Slyozov law for conserved systems. Further, the static structure factor shows a power-law decay with exponent 4 consistent with the Porod law. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_16663 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Phase separation dynamics in a symmetric binary mixture of ultrasoft particles Biswas, Tanmay Kahl, Gerhard Shrivastav, Gaurav P. Soft Condensed Matter Statistical Mechanics Phase separation plays an role in determining the self-assembly of biological and soft-matter systems. In biological systems, liquid-liquid phase separation inside a cell leads to the formation of various macromolecular aggregates. The interaction among these aggregates is soft, i.e., these can significantly overlap at a small energy cost. From the computer simulation point of view, these complex macromolecular aggregates are generally modeled by the so-called soft particles. The effective interaction between two particles is defined via the generalized exponential potential (GEM-n) with n = 4. Here, using molecular dynamics simulations, we study the phase separation dynamics of a size-symmetric binary mixture of ultrasoft particles. We find that when the mixture is quenched to a lower temperature below the critical temperature, the two components spontaneously start to separate. Domains of the two components form, and the equal-time order parameter reveals that the domains grow in a power-law manner with exponent 1/3, which is consistent with the Lifshitz-Slyozov law for conserved systems. Further, the static structure factor shows a power-law decay with exponent 4 consistent with the Porod law. |
| title | Phase separation dynamics in a symmetric binary mixture of ultrasoft particles |
| topic | Soft Condensed Matter Statistical Mechanics |
| url | https://arxiv.org/abs/2403.16663 |