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Keywords:

  • TiO2;
  • nanotubes;
  • photocatalytic properties;
  • semiconductors;
  • electrochemical properties
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Self-organized, freestanding TiO2 nanotube arrays that exhibit tube-in-tube morphology are fabricated using a one-step anodic method. These arrays are uniform and compact. The tubes within the arrays are several micrometers long with a 200 nm outer diameter. They have a coarse lateral profile that leads to a large aspect ratio and guarantees good photocatalytic properties.