title: Lifetime of Ionic Vacancy Created in Redox Electrode Reaction Measured by Cyclotron MHD Electrode.
abstract: The lifetimes of ionic vacancies created in ferricyanide-ferrocyanide redox reaction have been first measured by means of cyclotron magnetohydrodynamic electrode, which is composed of coaxial cylinders partly exposed as electrodes and placed vertically in an electrolytic solution under a vertical magnetic field, so that induced Lorentz force makes ionic vacancies circulate together with the solution along the circumferences. At low magnetic fields, due to low velocities, ionic vacancies once created become extinct on the way of returning, whereas at high magnetic fields, in enhanced velocities, they can come back to their initial birthplaces. Detecting the difference between these two states, we can measure the lifetime of ionic vacancy. As a result, the lifetimes of ionic vacancies created in the oxidation and reduction are the same, and the intrinsic lifetime is 1.25 s, and the formation time of nanobubble from the collision of ionic vacancies is 6.5 ms.
authors.affiliation: Research Organization for Nano and Life Innovation, Waseda University, Shinjuku-ku, Tokyo 162-0041, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Sugiyama
authors.affiliation: Saitama Prefectural Showa Water Filtration Plant, Kasukabe, Saitama 344-0113, Japan.
authors.forename: Ryoichi
authors.initials: R
authors.lastname: Morimoto
authors.affiliation: Research Organization for Nano and Life Innovation, Waseda University, Shinjuku-ku, Tokyo 162-0041, Japan.|School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Osaka
authors.affiliation: Institute for Materials Research, Tohoku University, Sendai, Sendai 980-8577, Japan.
authors.forename: Iwao
authors.initials: I
authors.lastname: Mogi
authors.affiliation: Yokohama Harbor Polytechnic College, Naka-ku, Yokohama 231-0811, Japan.
authors.forename: Miki
authors.initials: M
authors.lastname: Asanuma
authors.affiliation: Hokkaido Polytechnic College, Otaru, Hokkaido 047-0292, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Miura
authors.affiliation: Yamagata College of Industry and Technology, Matsuei, Yamagata 990-2473, Japan.
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Oshikiri
authors.affiliation: School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.|National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Yamauchi
authors.affiliation: National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan.|Polytechnic University, Sumida-ku, Tokyo 130-0026, Japan.
authors.forename: Ryoichi
authors.initials: R
authors.lastname: Aogaki