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Keywords:

  • antibodies;
  • fluorescence;
  • immunoassay;
  • nanotubes;
  • sensors
Thumbnail image of graphical abstract

High-aspect-ratio TiO2 nanotube (TiNT) layers can be used as low-cost, low-volume arrays for fluorescence immunosensing. High sensitivity for antibodies at a concentration of 0.01 pg mL−1 is provided by the high observation length (L) of the nanotubes. The photocatalytic properties of TiO2 make the TiNT arrays reusable after a short UV treatment.