Facile method to enhance the adhesion of TiO₂ nanotube arrays to Ti substrate.
The weak adhesion of anodic TiO2 nanotube arrays (TNTAs) to the underlying Ti substrate compromises many promising applications. In this work, a compact oxide layer between TNTAs and Ti substrate is introduced by employing an additional anodization in a fluoride-free electrolyte. The additional anodization results in an about 200 nm thick compact layer near the nanotube bottoms. Scratch test demonstrates that the critical load of TNTAs with the compact oxide layer is a more than threefold increase in comparison with those without the compact layer. Moreover, this facile method can also improve the photoactivity and supercapacitor performances of TNTAs markedly.
Key Laboratory of Soft Chemistry and Functional Materials of Education Ministry, Nanjing University of Science and Technology , Nanjing 210094, China.
Dongliang
D
Yu
Xufei
X
Zhu
Zhen
Z
Xu
Xiaomin
X
Zhong
Qunfang
Q
Gui
Ye
Y
Song
Shaoyu
S
Zhang
Xiaoyuan
X
Chen
Dongdong
D
Li