Theoretical derivation of anodizing current and comparison between fitted curves and measured curves under different conditions

Nanotechnology
Bin ChongXu-Fei Zhu

Abstract

Anodic TiO2 nanotubes have been studied extensively for many years. However, the growth kinetics still remains unclear. The systematic study of the current transient under constant anodizing voltage has not been mentioned in the original literature. Here, a derivation and its corresponding theoretical formula are proposed to overcome this challenge. In this paper, the theoretical expressions for the time dependent ionic current and electronic current are derived to explore the anodizing process of Ti. The anodizing current-time curves under different anodizing voltages and different temperatures are experimentally investigated in the anodization of Ti. Furthermore, the quantitative relationship between the thickness of the barrier layer and anodizing time, and the relationships between the ionic/electronic current and temperatures are proposed in this paper. All of the current-transient plots can be fitted consistently by the proposed theoretical expressions. Additionally, it is the first time that the coefficient A of the exponential relationship (ionic current j(ion) = A exp(BE)) has been determined under various temperatures and voltages. And the results indicate that as temperature and voltage increase, ionic current and el...Continue Reading

References

Apr 14, 2009·Nature Materials·Jerrod E Houser, Kurt R Hebert
Jul 14, 2010·Nano Letters·Dongdong LiJia G Lu
Mar 12, 2011·Angewandte Chemie·Poulomi RoyPatrik Schmuki
Dec 6, 2011·Nature Materials·Kurt R HebertPatrik Schmuki
Jun 6, 2012·Nano Letters·Siu-Fung LeungZhiyong Fan
Jan 30, 2014·ACS Applied Materials & Interfaces·Jie YangDongdong Li

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Citations

Feb 3, 2021·Nanotechnology·Sixiang LiuWang Zhang

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