Kinetics of titania nanotube formation by anodization of titanium films

被引：19

作者：

Butail, Gorun ^{[1
]}

Ganesan, P. G. ^{[1
]}

Raddiar, M. ^{[1
]}

Teki, R. ^{[1
]}

Ravishankar, N. ^{[1
]}

Duquette, D. J. ^{[1
]}

Ramanath, Ganpati ^{[1
]}

机构：

[1] Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180 USA

来源：

THIN SOLID FILMS | 2011年 / 519卷 / 06期

基金：

美国国家科学基金会;

关键词：

Titanium anodization; Kinetics; Activation energy; Oxygen diffusion; Titania; TIO2; NANOTUBES; ARRAYS; GROWTH; OXIDE;

D O I：

10.1016/j.tsf.2010.10.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the kinetics of titania nanotube length evolution during anodization of titanium films. Our results show that the nanotube length increase is thermally activated, and governed by voltage-dependent activation energy 0.6 eV <= E-eff <= 1.1 eV expressed by E-eff = E-0-alpha V-anod where alpha is a constant and E-0=1.6 eV is a voltage-independent term. The proximity of E-0 to that of oxygen diffusion in titania suggests that oxygen transport across the titania walls at the pore bottoms is the rate-limiting step. These results provide insights into the mechanism of titania nanotube formation and a framework for their rational synthesis for applications. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1821 / 1824

页数：4