1D TiO₂ nanotubes (TNTs) produced by anodization of Ti have attracted significant research and technological interest due to their excellent properties suitable for numerous applications. A huge challenge that remains is to develop reproducible protocols for the synthesis of extremely high aspect ratio (HAR) TNT layers. A new strategy for the growth of HAR TNT layers based on galvanostatic anodization of Ti in NH₄F/ethylene-glycol-based electrolyte with the addition of lactic acid (LA) is described. The results show that the addition of LA to the electrolyte can effectively prevent the dielectric breakdown during the anodization at elevated current densities. In comparison with the LA-free electrolyte, robust HAR TNT layers as thick as ≈44 μm can be produced within 15 min.

中文翻译：

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在含乳酸的电解质中通过恒电流阳极氧化形成高纵横比 TiO2 纳米管层

通过 Ti 阳极氧化生产的一维 TiO ₂纳米管 (TNT) 因其适用于多种应用的优异性能而引起了大量研究和技术兴趣。仍然存在的一个巨大挑战是开发可重复的协议来合成极高的纵横比 (HAR) TNT 层。描述了一种基于 Ti 在添加乳酸 (LA) 的NH ₄ F/乙二醇基电解质中进行恒电流阳极氧化的 HAR TNT 层生长的新策略。结果表明，在电解液中添加 LA 可以有效地防止在升高的电流密度下阳极氧化过程中的介电击穿。与不含 LA 的电解质相比，厚达 ≈44 μm 的坚固 HAR TNT 层可以在 15 分钟内生产出来。