Budroni M A, Rossi F
Department of Chemical, Physical, Mathematical and Natural Sciences, University of Sassari, Via Vienna 2, Sassari 07100, Italy.
Department of Physical Sciences, Earth and Environment, University of Siena, Piazzetta Enzo Tiezzi 1, 53100 Siena, Italy.
Phys Chem Chem Phys. 2024 Dec 4;26(47):29185-29226. doi: 10.1039/d4cp03466j.
Chemical oscillators attract transversal interest not only as useful models for understanding and controlling (bio)chemical complexity far from the equilibrium, but also as a promising means to design smart materials and power synthetic functional behaviors. We review and classify oscillatory phenomena in systems where a periodic variation in the concentration of the constitutive chemical species is induced by transport instabilities either triggered by simple reactions or without any reactive process at play. These phenomena, where the origin of the dynamical complexity is shifted from chemical to physical nonlinearities, can facilitate a variety of processes commonly encountered in chemistry and chemical engineering. We present an excursus through the main examples, discussing phenomenology, properties and modeling of different mechanisms that can lead to these kinds of oscillations. In particular, we reproduce the relevant results reported in the pertinent literature and, in parallel, propose new kinds of proof-of-concept systems substantiated by preliminary studies which can inspire new research lines. In the landscape of physically driven chemical oscillations, we devote particular attention to transport phenomena, actively or passively combined to (reactive or nonreactive) chemical species, which provide multiple pathways towards spontaneous oscillatory instabilities. Though with different specificities, the great part of these systems can be reduced to a common theoretical description. We finally overview possible perspectives in the study of physically driven oscillatory instabilities, showing how the related control can impact fundamental and applied open problems, ranging from origin of life studies to the optimization of processes with environmental relevance.
化学振荡器不仅作为理解和控制远离平衡态的（生物）化学复杂性的有用模型而吸引了广泛关注，而且作为设计智能材料和驱动合成功能行为的一种有前途的手段。我们对由简单反应引发或无任何反应过程参与的传输不稳定性导致本构化学物种浓度发生周期性变化的系统中的振荡现象进行了综述和分类。这些现象中，动力学复杂性的起源从化学非线性转变为物理非线性，能够促进化学和化学工程中常见的各种过程。我们通过主要例子进行了阐述，讨论了可能导致这类振荡的不同机制的现象学、性质和建模。特别是，我们重现了相关文献中报道的相关结果，同时提出了由初步研究证实的新型概念验证系统，这些系统可以激发新的研究方向。在物理驱动的化学振荡领域，我们特别关注与（反应性或非反应性）化学物种主动或被动结合的传输现象，它们为自发振荡不稳定性提供了多种途径。尽管这些系统具有不同的特性，但其中很大一部分可以简化为一个通用的理论描述。我们最后概述了物理驱动振荡不稳定性研究的可能前景，展示了相关控制如何影响从生命起源研究到与环境相关的过程优化等基础和应用方面的开放性问题。
