title: Spontaneous motion of an elliptic camphor particle.
abstract: The coupling between deformation and motion in a self-propelled system has attracted broader interest. In the present study, we consider an elliptic camphor particle for investigating the effect of particle shape on spontaneous motion. It is concluded that the symmetric spatial distribution of camphor molecules at the water surface becomes unstable first in the direction of a short axis, which induces the camphor disk motion in this direction. Experimental results also support the theoretical analysis. From the present results, we suggest that when an elliptic particle supplies surface-active molecules to the water surface, the particle can exhibit translational motion only in the short-axis direction.
authors: Department of Physics, Graduate School of Science, Chiba University, Chiba 263-8522, Japan. kitahata@physics.s.chiba-u.ac.jp
authors: Hiroyuki
authors: H
authors: Kitahata
authors: Keita
authors: K
authors: Iida
authors: Masaharu
authors: M
authors: Nagayama
mesh_terms: D002164:Camphor / Q000737:chemistry*; D003198:Computer Simulation; D004058:Diffusion; D008956:Models, Chemical; D008958:Models, Molecular; D009038:Motion; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water; D002164:Camphor