Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 11, Pages 8001-8005Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am5015716
Keywords
TiO2 nanotube; adhesion; fluoride-rich layer; compact oxide; photoelectrochemistry; supercapacitor
Funding
- National Natural Science Foundation of China [61171043, 51077072, 51377085, 51102271]
- Natural Science Foundation of Shanghai [11ZR1436300]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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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.
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