A thermodynamic analysis of end-directed particle flocking in chemical systems
A thermodynamic analysis of end-directed particle flocking in chemical systems
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DOI：
10.1016/j.cnsns.2021.106107
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发表时间：
2021-11-22
影响因子：
3.9
通讯作者：
Vaidya, A.
中科院分区：
文献类型：
--
作者：
De Bari, B.;Dixon, J.;Vaidya, A.
讨论了空气-水界面上自组织苯醌（BQ）粒子的热力学性质。实验（Satterwhite-Warden等人，2015; Chen等人，2019; Satterwhite-Warden等人，2019）揭示了BQ颗粒在液体表面上移动时会发生快速的瞬态植绒行为。可以看到，鸡群的大小各不相同，它们的形成和稳定性似乎取决于它们的形状。假设颗粒的自组织是由BQ颗粒的缓慢溶解引起的二维液体表面中的表面张力梯度的结果。本文采用质量作用动力学框架来研究粒子的群集。两个动力学模型，有和没有水库，提出和分析通过自由能的热力学透镜，它告诉我们占主导地位的和自发的“反应”或羊群形成的系统。该模型的结果与实验结果吻合良好，揭示了不规则形状的BQ粒子确实表现出比规则形状的粒子更大的倾向，形成羊群，并验证了质量作用框架作为一个适当的工具来研究这个系统。(C)2021爱思唯尔有限公司版权所有。
We discuss the thermodynamics behind self-organizing Benzoquinone (BQ) particles on air-water interface. Experiments (Satterwhite-Warden et al., 2015; Chen et al., 2019; Satterwhite-Warden et al., 2019) reveal that BQ particles undergo rapid transient flocking behavior as they move around on the liquid surface. Flocks are seen to vary in size and their formation and stability appears to be dependent upon their shape. It is hypothesized that self organization of particles is a result of surface tension gradients in the two dimensional liquid surface resulting from the slow dissolution of the BQ particles. The current paper uses a mass-action kinetic framework to study the flocking of particles. Two dynamical models, with and without a reservoir, are proposed and analyzed through the thermodynamic lens of free energy, which informs us about dominant and spontaneous 'reactions' or flock formations in the system. Results of the model are in good agreement with experiment, revealing that irregular shaped BQ particles do indeed show far greater propensity to form flocks compared with regularly shaped particles and validating the mass-action framework as an appropriate tool to investigate this system. (C) 2021 Elsevier B.V. All rights reserved.