title: Phototactic behavior of self-propelled micrometer-sized oil droplets in a surfactant solution.
abstract: We demonstrate the phototactic behavior of self-propelled micrometer-sized oil droplets in the presence of azobenzene-containing surfactants. These droplets respond sensitively to UV light irradiation due to a variation in the interfacial tension at the droplet surface induced by the molecular conversion of the azobenzene-containing surfactants.
authors.affiliation: Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. banno@applc.keio.ac.jp.
authors.forename: Sho
authors.initials: S
authors.lastname: Kaneko
authors.affiliation: Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. banno@applc.keio.ac.jp.
authors.forename: Kouichi
authors.initials: K
authors.lastname: Asakura
authors.affiliation: Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. banno@applc.keio.ac.jp.
authors.forename: Taisuke
authors.identifier: http://orcid.org/0000-0002-7480-4242
authors.initials: T
authors.lastname: Banno