New explanation on formation mechanism of anodic TiO2 nanotubes

Zebiao Li,Jie Pan,Haidong Bian,Jian Lu,Yang Yang Li

Materials Science and Engineering: B（2022）

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摘要

•A new growth mechanism of anodic TiO2 nanotubes (ATO) proposed.•Metastable substances (titanium oxyfluorides etc.) produced at tube bottom.•Metastable substances flow upwards, and then decompose and shrink, forming outer tube walls.•Origins of intertubular gap, intertubular ridge, and double-walled tube structure elucidated.•“Cap” layer of ATO formed due to a lack of metastable substance at film top surface.

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关键词

TiO2 nanotube arrays,Anodization,Formation mechanism

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