title: Multicolour photochromism of colloidal solutions of niobate nanosheets intercalated with several kinds of metal ions.
abstract: Colourless and transparent colloidal solutions of niobate nanosheets intercalated with some kinds of metal ions (M-NNS, M: metal) showed quasi-reversible photochromism. Ultraviolet light irradiation of the solutions induced a change in color while maintaining the transparency, and the color change was dependent on the metal ions. The coloured solutions were bleached by exposure to an oxidizing atmosphere. This cycle could be repeated several times.
authors.affiliation: Department of Chemistry and Materials Engineering, Graduate School of Engineering, Nagasaki University, Nagasaki 852-8521, Japan. kkamada@nagsaki-u.ac.jp.
authors.forename: Kai
authors.initials: K
authors.lastname: Kamada
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Motoko
authors.initials: M
authors.lastname: Tokunaga
authors.forename: Taro
authors.initials: T
authors.lastname: Ueda
authors.forename: Takeo
authors.initials: T
authors.lastname: Hyodo
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Shimizu