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Hui Li, Jian-Wen Cheng, Shiwei Shu, Jie Zhang, Lingxia Zheng, Chun Kwan Tsang, Hua Cheng, Fengxia Liang, Shuit-Tong Lee and Yang Yang Li TiO2 Nanotubes: Selective Removal of the Outer Shells of Anodic TiO2 Nanotubes (Small 1/2013) Small 9

Version of Record online: 3 JAN 2013 | DOI: 10.1002/smll.201370006

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The image shows a facile electrochemical method described in detail on page 37 by Y. Y. Li and co-workers. The method enables selective removal of the outer walls of anodic TiO2 nanotubes by leaving the as-anodized nanotubes in the same electrolyte and applying an electric field parallel to the anodic film for several minutes. The betterseparated single-walled TiO2 nanotubes thus obtained show significantly improved photocatalytic efficiency compared with their non-etched counterparts.

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