Distinguishing the dynamic fingerprints of two- and three-dimensional chemical waves in microbeads
Distinguishing the dynamic fingerprints of two- and three-dimensional chemical waves in microbeads
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区分微珠中二维和三维化学波的动态指纹
DOI：
10.1021/acs.jpca.7b12210
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
S. Nakata
中科院分区：
文献类型：
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作者：
M. Kuze;H. Kitahata;O. Steinbock;S. Nakata
限于准2D表层或3D体积的时空振荡在生命系统中基于波的信息传递和全球振荡中扮演着重要的角色。在这里，我们描述了限制在微珠中的Belousov-Zhabotinsky反应的实验，在该反应中，催化剂被选择性地负载到球形小球的表面或体内。我们发现，表面约束下的整体振荡、行进反应阵面和旋转螺旋波的动力学与微珠体积中的动力学有很大的不同。我们的结果建立了一个有用的模型系统，用于研究非线性化学过程的几何效应，并提供了诊断特征，允许区分生物细胞中膜介导的2D和细胞质3D过程。
Spatiotemporal oscillations confined to quasi-2D surface layers or 3D volumes play an important role for wave-based information relay and global oscillations in living systems. Here, we describe experiments with the Belousov–Zhabotinsky reaction confined to microbeads, in which the catalyst is selectively loaded either onto the surface or into the body of the spherical beads. We find that the dynamics of global oscillations, traveling reaction fronts, and rotating spiral waves under surface confinement are strikingly different from those in the bead volume. Our results establish a useful model system for the study of geometrical effects on nonlinear chemical processes and provide diagnostic features that allow the distinction of membrane-mediated 2D and cytosolic 3D processes in biological cells.