title: Spontaneous Formation of Microgroove Arrays on the Surface of p-Type Porous Silicon Induced by a Turing Instability in Electrochemical Dissolution.
abstract: Self-organization plays an imperative role in recent materials science. Highly tunable, periodic structures based on dynamic self-organization at micrometer scales have proven difficult to design, but are desired for the further development of micropatterning. In the present study, we report a microgroove array that spontaneously forms on a p-type silicon surface during its electrodissolution. Our detailed experimental results suggest that the instability can be classified as Turing instability. The characteristic scale of the Turing-type pattern is small compared to self-organized patterns caused by the Turing instabilities reported so far. The mechanism for the miniaturization of self-organized patterns is strongly related to the semiconducting property of silicon electrodes as well as the dynamics of their surface chemistry.
authors.affiliation: Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501 (Japan). fukami.kazuhiro.2u@kyoto-u.ac.jp.|Physik Department E19a, Technische Universität München, James-Franck-Str. 1, 85748, Garching (Germany). fukami.kazuhiro.2u@kyoto-u.ac.jp.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Fukami
authors.affiliation: Department of Energy and Hydrocarbon Chemistry, Kyoto University, Nishikyo-ku, Kyoto 615-8510 (Japan).
authors.forename: Tomoko
authors.initials: T
authors.lastname: Urata
authors.affiliation: Physik Department E19a, Technische Universität München, James-Franck-Str. 1, 85748, Garching (Germany).
authors.forename: Katharina
authors.initials: K
authors.lastname: Krischer
authors.affiliation: Department of Energy and Hydrocarbon Chemistry, Kyoto University, Nishikyo-ku, Kyoto 615-8510 (Japan).
authors.forename: Naoya
authors.initials: N
authors.lastname: Nishi
authors.affiliation: Department of Energy and Hydrocarbon Chemistry, Kyoto University, Nishikyo-ku, Kyoto 615-8510 (Japan).
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Sakka
authors.affiliation: Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501 (Japan).
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kitada
authors.affiliation: Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501 (Japan).
authors.forename: Kuniaki
authors.initials: K
authors.lastname: Murase
keywords: Turing pattern; grooves; self-organization; semiconductors; silicon