title: Experimental and theoretical studies on the self-motion of a phenanthroline disk coupled with complex formation.
abstract: A change in the mode of self-motion coupled with complex formation was investigated experimentally and theoretically. A 1,10-phenanthroline disk floating on water exhibited either uniform or intermittent motion (in which the disk altered between rapid motion and a resting state) depending on the concentration of Fe(2+) in the aqueous phase. Since the driving force for this motion is considered to be governed by the surface concentrations of phenanthroline (phen) and [Fe(phen)(3)](2+), it is important to understand the relationship between the kinetics near the air/water interface and the mode of motion. We propose a mathematical model for the motion of the phenanthroline disk and discuss the validity of this model based on a comparison with the experimental results.
authors.affiliation: Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan.
authors.forename: Keita
authors.initials: K
authors.lastname: Iida
authors.forename: Nobuhiko J
authors.initials: NJ
authors.lastname: Suematsu
authors.forename: Yumi
authors.initials: Y
authors.lastname: Miyahara
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kitahata
authors.forename: Masaharu
authors.initials: M
authors.lastname: Nagayama
authors.forename: Satoshi
authors.initials: S
authors.lastname: Nakata