Traveling waves propagating through coupled microbeads in the Belousov?Zhabotinsky reaction
Traveling waves propagating through coupled microbeads in the Belousov?Zhabotinsky reaction
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Belousov?Zhabotinsky 反应中行波通过耦合微珠传播
DOI：
10.1039/d1cp03916d
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发表时间：
2021
影响因子：
3.3
通讯作者：
Nakata Satoshi
中科院分区：
文献类型：
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作者：
Kuze Masakazu;Kitahata Hiroyuki;Nakata Satoshi
时空模式，即全局振荡 (GO) 和行波 (TW)，在球形微珠中进行了研究，该微珠负载有催化剂，用于在表面（2D 加载）或整个珠子体积（3D 加载）上进行 Belousov-Zhabotinsky (BZ) 反应。 GO 和 TW 选择性地分别出现在 2D 和 3D 负载的珠子中，这些珠子放置在无催化剂的 BZ 溶液中的聚对苯二甲酸乙二醇酯 (PET) 片上。我们检查了两个珠子的两种耦合类型：2D-3D 和 3D-3D 耦合。在这两种情况下，当两个珠子之间的最小距离 l 小于阈值时，就会发生同步。在这里，我们不仅报告了时间信息，即相位差，还报告了空间信息，即通过耦合的 BZ 珠传播的 TW 的方向。在 2D-3D 耦合的同步中，3D 加载珠中的 TW 作为起搏器从 2D 加载珠附近的点启动，并沿相反方向传播。相比之下，3D 加载珠中 TW 的方向根据 3D-3D 耦合同步中的 l 变化。这些实验结果可以通过基于 BZ 反应活化剂扩散动力学的数值计算来定量重现。我们的结果表明，时空波传播的特征表明了振荡器的配置。
Spatio-temporal patterns, namely global oscillations (GO) and traveling waves (TW), were investigated in spherical microbeads loaded with a catalyst for the Belousov–Zhabotinsky (BZ) reaction onto the surface (2D-loaded) or the entire volume of the bead (3D-loaded). GO and TW selectively appeared in the 2D- and 3D-loaded beads, respectively, placed on a polyethylene terephthalate (PET) sheet in the catalyst-free BZ solution. We examined two types of coupling of the two beads: 2D–3D and 3D–3D couplings. In both cases, synchronization occurred when the minimum distance between the two beads, l, was shorter than the threshold. Herein, we reported not only temporal information, that is, phase difference, but also spatial information, that is, the directions of the TW propagating through the coupled BZ beads. In the synchronization for the 2D–3D coupling, TW in the 3D-loaded bead were initiated from the point near the 2D-loaded bead as a pacemaker and propagated in the opposite direction. By contrast, the directions of the TW in the 3D-loaded bead changed depending on l in the synchronization for the 3D–3D coupling. These experimental results can be quantitatively reproduced by numerical calculations based on the diffusion dynamics of an activator of the BZ reaction. Our results suggest that the features of spatio-temporal wave propagation are indicative of the configuration of the oscillators.