Gravity assisted growth of self-organized anodic oxide nanotubes on titanium

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• 作者：Doohun Kim ; Felix Schmidt-Stein ; Robert Hahn ; Patrik Schmuki
• 关键词：Titanium oxide ; Self-organized nanotubes ; Anodic oxidation ; High gravity field ; Centrifuge ; Diffusion and convection
• 刊名：Electrochemistry Communications
• 出版年：2008
• 期刊代码：29_13882481
• 类别：ch
• 出版时间：July 2008
• 卷：10
• 期：7
• 页码：1082-1086
• 文件大小：901 K

摘要

The present work investigates the anodic growth of self-organized TiO₂ nanotube arrays under different gravity fields. It is found that the aspect ratio of the nanotubes can be strongly affected by the orientation of the growing tubes within the natural gravity field or by high artificial gravitational fields in a centrifuge. Particularly remarkable is that under identical electrochemical growth conditions, the length of the nanotubes can be extended from 0.8 μm to 1.8 μm arranging the tube growth direction with or against the gravity field, or even extended up to 6.0 μm under high centrifugal forces (3220g).