标题： 打破布朗屏障：复杂流体中分子扩散的模型和表现 显示英文标题

标题： Breaking the Brownian Barrier: Models and Manifestations of Molecular Diffusion in Complex Fluids

摘要： 一个多世纪前，爱因斯坦提出了一个精确的数学模型来描述布朗运动。 尽管这个模型能够充分解释微米级粒子在流体中的扩散，但当应用于流体中的分子自扩散时，其局限性变得明显。 高斯性和马尔可夫性是布朗扩散范式的核心原理，在描述分子扩散方面尤其在具有复杂分子间相互作用和受阻弛豫过程的复杂流体中显得不足。 这一观点深入探讨了在各种复杂流体中观察到的细微行为，包括分子自组装、共晶溶剂和离子液体，特别关注于这些介质中的自扩散建模。 我们探讨了通过使用非局部扩散方程扩展布朗模型来纳入非高斯和非马尔可夫效应的潜力。 此外，我们通过利用这些模型来描述非弹性中子散射和MD模拟的结果来验证这些模型的适用性。 显示英文摘要

摘要： Over a century ago, Einstein formulated a precise mathematical model for describing Brownian motion. While this model adequately explains the diffusion of micron-sized particles in fluids, its limitations become apparent when applied to molecular self-diffusion in fluids. The foundational principles of Gaussianity and Markovianity, central to the Brownian diffusion paradigm, are insufficient for describing molecular diffusion, particularly in complex fluids characterized by intricate intermolecular interactions and hindered relaxation processes. This perspective delves into the nuanced behavior observed in diverse complex fluids, including molecular self-assembly, deep eutectic solvents, and ionic liquids, with a specific focus on modeling self-diffusion within these media. We explore the potential of extending diffusion models to incorporate non-Gaussian and non-Markovian effects by augmenting the Brownian model using non-local diffusion equations. Further, we validate the applicability of these models by utilizing them to describe results from quasielastic neutron scattering and MD simulations.