title: Cladding layer on well-defined double-wall TiO2 nanotubes.
abstract: Highly ordered double-wall TiO2 nanotube arrays were obtained by a two-step anodization method in a fluoride-containing glycerol based electrolyte. The low water and fluoride content and high viscosity of the electrolyte support a partly undissolved fluoride-rich layer, and its hydrolyzed products remain on the tube walls. The double-wall structure and a cladding layer originating from the fluoride-rich layer were clearly observed after annealing. The morphology and crystal structure of the cladding layer were investigated. The study of the cladding layer gives a fundamental insight into the wall structure design of the anodic TiO2 nanotubes in the glycerol-based electrolyte.
authors.affiliation: Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University , Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan.
authors.forename: Chaorui
authors.initials: C
authors.lastname: Xue
authors.forename: Tetsu
authors.initials: T
authors.lastname: Yonezawa
authors.forename: Mai Thanh
authors.initials: MT
authors.lastname: Nguyen
authors.forename: Xu
authors.initials: X
authors.lastname: Lu