Quantitative Estimation of the Parameters for Self-Motion Driven by Difference in Surface Tension

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• 作者：Nobuhiko J. Suematsu ; Tomohiro Sasaki ; Satoshi Nakata ; Hiroyuki Kitahata
• 刊名：Langmuir
• 出版年：2014
• 出版时间：July 15, 2014
• 年：2014
• 卷：30
• 期：27
• 页码：8101-8108
• 全文大小：398K
• ISSN：1520-5827

文摘

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 渭N, which corresponds to a difference in surface tension of 1.1 mN m^鈥?. 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.