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arXiv 2501.04790cond-mat.soft
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DNA颗粒溶液的一个相场模型

A phase-field model for solutions of DNA-made particles

Marco Cappa, Francesco Sciortino, Lorenzo Rovigatti

AI总结:

本文提出基于Cahn-Hilliard方程的相场模型,结合Wertheim理论自由能,模拟DNA纳米星系统的相分离,能复现实验现象并适用于复杂多组分系统,为DNA材料研究提供基础。

摘要:

我们提出了一个基于Cahn-Hilliard方程的相场模型,用以研究DNA纳米星系统中的相分离特性。利用源自Wertheim理论的真实自由能泛函,我们的模型能够捕捉自组装DNA纳米星在不同条件下的热力学性质。该方法适用于研究单组分和多组分系统,包括不同纳米星种类及交联剂的混合物。通过数值模拟,我们展示了该模型复现实验观察的能力,包括液-液相分离、表面张力变化以及多组分系统的结构组织。我们的结果凸显了Cahn-Hilliard框架的通用性和预测能力,尤其是在详细模拟计算代价高昂的复杂系统中。这项工作为研究基于DNA的材料及其在纳米技术和生物物理学中的潜在应用(包括细胞环境中的液-液相分离)提供了坚实的基础。

英文摘要:

We present a phase-field model based on the Cahn-Hilliard equation to investigate the properties of phase separation in DNA nanostar systems. Leveraging a realistic free-energy functional derived from Wertheim theory, our model captures the thermodynamic properties of self-assembling DNA nanostars under various conditions. This approach allows for the study of both one-component and multi-component systems, including mixtures of different nanostar species and cross-linkers. Through numerical simulations, we demonstrate the model ability to replicate experimental observations, including liquid-liquid phase separation, surface tension variation, and the structural organisation of multi-component systems. Our results highlight the versatility and predictive power of the Cahn-Hilliard framework, particularly for complex systems where detailed simulations are computationally prohibitive. This work provides a robust foundation for studying DNA-based materials and their potential applications in nanotechnology and biophysics, including liquid-liquid phase separation in cellular environments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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