title: Free-standing TiO(2) nanotube arrays made by anodic oxidation and ultrasonic splitting.
abstract: A facile and green method was employed to prepare large-scale free-standing TiO(2) nanotube (TNT) arrays, in which as-anodized TiO(2) nanotube films prepared in organic electrolytes with thickness ranging from seven to tens of micrometers were then ultrasonicated in a mix solution of ethanol and water. By controlling the ratio of ethanol to water, the time and the power of ultrasonication, large-scale free-standing TiO(2) nanotube arrays without any crack could be detached from the Ti substrates. Hydrogen sensing results demonstrated that the free-standing TNT film is more sensitive than a film with Ti substrates when exposed to 1000 ppm hydrogen ambient.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China.
authors.forename: Qingwei
authors.initials: Q
authors.lastname: Chen
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Xu
authors.forename: Zhongyun
authors.initials: Z
authors.lastname: Wu
authors.forename: Zhongfan
authors.initials: Z
authors.lastname: Liu