Enhanced physical properties of the anodic TiO2 nanotubes via proper anodization time
الموضوعات : Journal of Theoretical and Applied Physics
Zahra Jedi-soltanabadi
1
(
Young Researchers and Elite Club, Ardabil Branch, Islamic Azad University
)
Negin Pishkar
2
(
Young Researchers and Elite Club, Ardabil Branch, Islamic Azad University
)
Mahmood Ghoranneviss
3
(
Department of Physics, Science and Research Branch, Islamic Azad University
)
الکلمات المفتاحية: TiO nanotube, Anodization time, Morphology, Band gap,
ملخص المقالة :
AbstractVertically aligned titanium dioxide (TiO2) nanotubes were synthesized by electrochemical anodic oxidation in an electrolyte solution containing 0.45 wt% ammonium fluoride (NH4F) and 2 vol% deionized water at constant potential (70 V) for various anodization time at the room temperature. The influence of the anodization time on the morphology and optical properties of the anodic TiO2 nanotubes have been studied. Field emission scanning electron microscopy results revealed that the anodic TiO2 nanotube morphology extremely depends on the anodization time. It was observed that by increasing anodization time, length of the anodic TiO2 nanotubes increased and nanotubes destroyed at the top of the tubes. After a long time of anodization process (9 h), nanotubes completely destroyed. Photoluminescence measurements showed that the anodic TiO2 nanotube band gap energy depends on the anodic TiO2 nanotube morphology. The anodic TiO2 nanotubes without any damage had a minimum band gap energy (2.9 eV).
