Superlattice structures and Nb-doping in self-organized TiO2 nanotube layers: Controlled growth and electronic properties

自组织 TiO2 纳米管层中的超晶格结构和 Nb 掺杂：控制生长和电子特性

• 批准号: 26416174
• 负责人: Professor Dr. Patrik Schmuki
• 金额: --
• 依托单位: Lehrstuhl für Korrosion und Oberflächentechnik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/26416174?language=en
• 关键词: Superlattice; structures; Nb; doping; self

Recently, the electrochemical formation of self-organized TiO2 nanotubes has attracted considerable attention due to the high potential of the structures for nanoscale based technological applications. Typically, these nanotubes are formed by anodization of Ti in diluted HF electrolytes. Under specific electrochemical conditions, nanoporous layers form that consist of TiO2 nanotubes with a diameter of approximately 100 nm and a spacing to neighboring pores of about 150 nm. Recent experiments in our laboratory demonstrate that comparably thick layers (pm-range) of TiO2 nanotubes can be produced. One part of the present funding application aims at a detailed investigation of the growth limits and mechanisms involved in the selforganization and pore growth processes. A second path will explore the technological potential of the TiO2 nanotubes in view of the photoelectrochemical properties. Exploiting the semiconductive nature of TiO2 in the form of nanotubes for e.g., solar energy conversion and self-cleaning requires detailed investigations on the properties of the tubes upon annealing, doping, and dye sensitization.

近年来，自组织TiO2纳米管的电化学形成引起了人们的广泛关注，因为这种结构具有纳米级技术应用的巨大潜力。通常，这些纳米管是通过在稀释的HF电解质中阳极氧化Ti而形成的。在特定的电化学条件下，形成由TiO2纳米管组成的纳米孔层，其直径约为100 nm，相邻孔间距约为150 nm。我们实验室最近的实验表明，可以生产相当厚的TiO2纳米管层（pm范围）。目前资助申请的一部分旨在详细研究自组织和孔生长过程中涉及的生长限制和机制。第二条路径将探索TiO2纳米管的光电化学特性的技术潜力。利用纳米管形式的TiO2的半导体性质用于太阳能转换和自清洁，需要对纳米管在退火、掺杂和染料敏化方面的性能进行详细的研究。