Recursively positive and negative chemotaxis coupling with reaction kinetics in self-organized inanimate motion
Recursively positive and negative chemotaxis coupling with reaction kinetics in self-organized inanimate motion
复制标题
自组织无生命运动中递归正负趋化性与反应动力学的耦合
DOI：
10.1016/j.jcis.2023.02.039
复制
发表时间：
2023
影响因子：
9.9
通讯作者：
Nakata Satoshi
中科院分区：
文献类型：
--
作者：
Matsuo Muneyuki;Ejima Kaho;Nakata Satoshi
在发展递归和自主的人工质量传输系统中，重建无生命自走物体的递归趋化性是不可避免的。然而，无生命递归趋化的制造一直是极具挑战性的，因为在无生命的自推进物体中引入竞争性正反馈和负反馈是困难的。在这里，香豆素衍生物（香豆素，4-甲基香豆素（4-MC），或6-甲基香豆素（6-MC））为基础的圆盘漂浮在水上作为一个自我推进的物体表现出运动的特征；这些特征包括连续运动，对na3po4粉末的正、负趋化性之间的重复，以及根据粉末的na3po4密度和香豆素衍生物的官能团在na3po4粉末之上的振荡运动。讨论了香豆素衍生物的表面张力作为运动的驱动力，以及香豆素衍生物与氢氧化钠水解的反应速率对碱刺激的运动特征的机理。该研究为开发递归化趋系统提供了一条新的途径，该系统与自组织运动中的反应动力学相结合。
Reconstructing recursive chemotaxis in inanimate self-propelled objects is inevitable in the development of recursively and autonomously artificial mass transport systems. However, the fabrication of inanimately recursive chemotaxis has been extremely challenging because of the difficulty in introducing competitive positive and negative feedback into an inanimate self-propelled object. Herein, a coumarin derivative (coumarin, 4-methylcoumarin (4-MC), or 6-methylcoumarin (6-MC))-based disk floated on water as a self-propelled object exhibited characteristic features of motion; these features include continuous motion, repetition between positive and negative chemotaxis to the Na3PO4powder as a base stimulus, and oscillatory motion above the Na3PO4powder depending on the Na3PO4density of the powder and the functional group of coumarin derivatives. The mechanism of the characteristic features of motion to the base stimulus is discussed in relation to the surface tension of the coumarin derivatives as the driving force of motion and the reaction rate of the hydrolysis between coumarin derivatives and OH–obtained from Na3PO4. This study suggests a novel avenue for developing a recursive chemotactic system coupled with reaction kinetics in self-organized motion.