Suematsu Nobuhiko J, Sasaki Tomohiro, Nakata Satoshi, Kitahata Hiroyuki
Graduate School of Advanced Mathematical Sciences, Meiji University , 4-21-1 Nakano, Tokyo 164-8525, Japan.
Langmuir. 2014 Jul 15;30(27):8101-8. doi: 10.1021/la501628d. Epub 2014 Jun 30.
Quantitative information on the parameters associated with self-propelled objects would enhance the potential of this research field; for example, finding a realistic way to develop a functional self-propelled object and quantitative understanding of the mechanism of self-motion. We therefore estimated five main parameters, including the driving force, of a camphor boat as a simple self-propelled object that spontaneously moves on water due to difference in surface tension. The experimental results and mathematical model indicated that the camphor boat generated a driving force of 4.2 μN, which corresponds to a difference in surface tension of 1.1 mN m(-1). The methods used in this study are not restricted to evaluate the parameters of self-motion of a camphor boat, but can be applied to other self-propelled objects driven by difference in surface tension. Thus, our investigation provides a novel method to quantitatively estimate the parameters for self-propelled objects driven by the interfacial tension difference.
与自行推进物体相关参数的定量信息将提升该研究领域的潜力；例如，找到一种切实可行的方法来开发功能性自行推进物体，并对自运动机制进行定量理解。因此，我们估算了樟脑船作为一种简单自行推进物体的五个主要参数，包括驱动力，该物体由于表面张力差异而在水面上自发移动。实验结果和数学模型表明，樟脑船产生了4.2微牛顿的驱动力，这相当于1.1毫牛顿每米的表面张力差。本研究中使用的方法不仅限于评估樟脑船自运动的参数，还可应用于其他由表面张力差异驱动的自行推进物体。因此，我们的研究提供了一种新颖的方法来定量估算由界面张力差驱动的自行推进物体的参数。
