Who wins the race near the interface? Stratification of colloids, nano-surfactants, and others
Who wins the race near the interface? Stratification of colloids, nano-surfactants, and others
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DOI：
10.1063/5.0098710
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发表时间：
2022-09-21
影响因子：
3.2
通讯作者：
Jiang, Shan
中科院分区：
文献类型：
--
作者：
Li, Yifan;Marander, Matthew;Jiang, Shan
胶体，纳米颗粒和小分子在气液界面附近的扩散呈现出有趣的多相传输现象，并为理解表面和界面附近的相互作用提供了独特的机会。当不同的物种在最终干燥的涂层结构中占据界面时，发生分层。了解分层的原理可以导致材料制造的新兴技术，并有可能解锁创新的工业解决方案，如智能涂层和控释药物配方。然而，分层可能令人困惑和不可预测。它可能涉及粒子和界面之间复杂的相互作用。表面化学和溶液条件在确定界面附近颗粒的种族方面是至关重要的。目前的理论和模拟不能完全解释一些实验中的观察结果，特别是新发展的纳米表面活性剂的分层。在这里，我们总结了在实验工作，理论和模拟分层的努力，重点是弥合我们的理解表面吸附和体扩散之间的知识差距。我们还将提出新的分层机制的基础上，最近的观察纳米表面活性剂分层。更重要的是，这里的讨论将奠定基础，为未来的研究超出分层和纳米表面活性剂。这些结果将导致对纳米颗粒相互作用和界面附近运输的基本理解，这将深刻影响许多其他研究领域，包括纳米复合材料，自组装，胶体稳定性和纳米医学。由AIP Publishing独家授权出版。
The diffusion of colloids, nanoparticles, and small molecules near the gas-liquid interface presents interesting multiphase transport phenomena and unique opportunities for understanding interactions near the surface and interface. Stratification happens when different species preside over the interfaces in the final dried coating structure. Understanding the principles of stratification can lead to emerging technologies for materials' fabrication and has the potential to unlock innovative industrial solutions, such as smart coatings and drug formulations for controlled release. However, stratification can be perplexing and unpredictable. It may involve a complicated interplay between particles and interfaces. The surface chemistry and solution conditions are critical in determining the race of particles near the interface. Current theory and simulation cannot fully explain the observations in some experiments, especially the newly developed stratification of nano-surfactants. Here, we summarize the efforts in the experimental work, theory, and simulation of stratification, with an emphasis on bridging the knowledge gap between our understanding of surface adsorption and bulk diffusion. We will also propose new mechanisms of stratification based on recent observations of nano-surfactant stratification. More importantly, the discussions here will lay the groundwork for future studies beyond stratification and nano-surfactants. The results will lead to the fundamental understanding of nanoparticle interactions and transport near interfaces, which can profoundly impact many other research fields, including nanocomposites, self-assembly, colloidal stability, and nanomedicine. Published under an exclusive license by AIP Publishing.