New types of complex motion of a simple camphor boat
New types of complex motion of a simple camphor boat
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简单樟脑船的新型复杂运动
DOI：
10.1039/d2cp05707g
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发表时间：
2023
影响因子：
3.3
通讯作者：
Gorecki Jerzy
中科院分区：
文献类型：
--
作者：
Loffler Richard J.G.;Rolinski Tomasz;Kitahata Hiroyuki;Koyano Yuki;Gorecki Jerzy
我们讨论矩形樟脑船的运动，考虑樟脑丸相对于船尾的位置作为控制参数。船移动是因为药丸释放表面活性分子，降低表面张力并支持运动。我们引入了一种新的实验系统，其中船在长臂上绕位于培养皿中心的轴旋转；因此，运动被限制在一个圆内，并且可以在静止条件下进行长时间的研究。实验证实了先前报道的两种运动模式：当药丸位于船边缘时为连续运动，当药丸靠近船中心时为脉动（间歇）运动（Suematsu et al., J. Phys. Chem. C, 2010, 114(21), 9876–9882）。对于中间药丸位置，我们观察到一种新的、未报告的运动类型，其特征是振荡速度（即振荡运动）。对于相同的药丸位置可以观察到不同的运动模式。使用上述论文中使用的简单的船演化反应扩散模型定性地证实了实验结果。
We discuss the motion of a rectangular camphor boat, considering the position of a camphor pill in relation to the boat's stern as the control parameter. The boat moves because the pill releases surface active molecules that decrease the surface tension and support the motion. We introduce a new experimental system in which the boat rotates on a long arm around the axis located at the centre of a Petri dish; thus, the motion is restricted to a circle and can be studied under stationary conditions for a long time. The experiments confirmed two previously reported modes of motion: continuous motion when the pill was located at the boat edge and pulsating (intermittent) motion if it was close to the boat centre (Suematsu et al., J. Phys. Chem. C, 2010, 114(21), 9876–9882). For intermediate pill locations, we observed a new, unreported type of motion characterised by oscillating speed (i.e. oscillating motion). Different modes of motion can be observed for the same pill location. The experimental results are qualitatively confirmed using a simple reaction-diffusion model of the boat evolution used in the above-mentioned paper.