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arXiv 1610.04517cond-mat.mtrl-sci
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定向金属氧化物纳米管阵列:阳极TiO2纳米管形成和性能的关键方面

Aligned metal oxide nanotube arrays: key-aspects of anodic TiO2 nanotube formation and properties

Francesca Riboni, Nhat Truong Nguyen, Seulgi So, Patrik Schmuki

摘要:

在过去的十年里,自对准TiO2纳米管吸引了巨大的科学和技术的兴趣,由于其预期的影响,能源转换,环境修复和生物相容性。在本手稿中,我们审查的基本原则,支配阳极二氧化钛纳米管的自组织启动。我们从一个基本问题开始:为什么会发生自组织?我们说明了固有的关键机制方面,导致管生长在各种不同的形态,如波纹壁管,光滑管,堆栈和竹型管,重要的是双壁TiO 2纳米管与单壁管的形成,以及它们的物理和化学性质的巨大差异。我们展示了如何双壁和单壁管层可以从金属基材上分离,并利用强大的自立膜的制备。最后,我们展示了如何通过选择正确的生长方法来显著改善TiO 2纳米管的特定功能特性,例如,可以实现增强的电子迁移率、本征掺杂、或在极高温度下结晶成纯SiO2。这反过来又可以在广泛的应用中构建基于阳极TiO 2的高性能器件。

英文摘要:

Over the past ten years, self-aligned TiO2 nanotubes have attracted tremendous scientific and technological interest due to their anticipated impact on energy conversion, environment remediation and biocompatibility. In the present manuscript, we review fundamental principles that govern the self-organized initiation of anodic TiO2 nanotubes. We start with the fundamental question: Why is self-organization taking place? We illustrate the inherent key mechanistic aspects that lead to tube growth in various different morphologies, such as rippled-walled tubes, smooth tubes, stacks and bamboo-type tubes, and importantly the formation of double-walled TiO2 nanotubes versus single-walled tubes, and the drastic difference in their physical and chemical properties. We show how both double- and single-walled tube layers can be detached from the metallic substrate and exploited for the preparation of robust self-standing membranes. Finally, we show how by selecting the right growth approach to TiO2 nanotubes specific functional features can be significantly improved, e.g., an enhanced electron mobility, intrinsic doping, or crystallization into pure anatase at extremely high temperatures can be achieved. This in turn can be exploited in constructing high performance devices based on anodic TiO2 in a wide range of applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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