title: Facile electrochemical synthesis of hexagonal Cu2O nanotube arrays and their application.
abstract: Large-scale and highly oriented single-crystalline hexagonal Cu(2)O nanotube arrays have been successfully synthesized using a two-step solution approach, which involves the electrodeposition of oriented Cu(2)O nanorods and a subsequent dissolution technique along the c axis to form a tubular structure. Herein, NH(4)Cl was found to be an effectual additive, and it can successfully realize the dissolution process of Cu(2)O from nanorods to nanotubes. The dissolution mechanism of Cu(2)O from nanorods to nanotubes was illustrated in detail. These prepared Cu(2)O nanotube arrays were characterized by SEM, EDS, XRD, XPS, and TEM. The photoluminescence (PL) spectrum of Cu(2)O nanotube arrays was also measured, and it shows there is a greater fraction of copper or oxygen vacancies in these prepared Cu(2)O nanotubes. Finally, the applications of Cu(2)O nanotube arrays for gas sensors were investigated in this paper.
authors.affiliation: MOE Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, China.
authors.forename: Jin-Hui
authors.initials: JH
authors.lastname: Zhong
authors.forename: Gao-Ren
authors.initials: GR
authors.lastname: Li
authors.forename: Zi-Long
authors.initials: ZL
authors.lastname: Wang
authors.forename: Yan-Nan
authors.initials: YN
authors.lastname: Ou
authors.forename: Ye-Xiang
authors.initials: YX
authors.lastname: Tong