K. F. Albertin

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TiO<sub>2</sub> nanotube arrays obtained by Ti foil anodization are tested as pH electrodes, showing performance close to standard glass electrodes. The TiO<sub>2</sub> nanotube arrays were obtained by Ti foil anodization in a NH<sub>4</sub>F organic solution with 20, 40 and 60 V and different anodization times. The obtained nanotubes samples were(More)
The development of high sensitive miniaturized sensors is of special importance for "Lab on a Chip" and biosensors development. In this context and due to its n-type semiconductor character and its high chemical stability, TiO<sub>2</sub> thin films have been proposed for application as pH and H sensors. Even more, taking advantage of their high specific(More)
pH sensor fabricated with TiO<sub>2</sub> nanotube arrays with diameter and length controlled by the anodization voltage and time were obtained and characterized. The TiO<sub>2</sub> nanotube arrays were obtained by Ti foil anodization in a NH4F organic solution with 20 and 40 V for 5, 15 and 25 min. pH sensors based on Ti<sub>2</sub> NTs electrodes(More)
Hydrogen sensors, intending to operate at low temperatures (around 25&#x00B0;C), based on TiO<sub>2</sub> nanotube arrays were fabricated and characterized in N<sub>2</sub>/H<sub>2</sub> atmosphere with different nitrogen concentrations. The nanotube arrays were obtained through Ti anodic oxidation in a NH<sub>4</sub>F in ethylene glycol (0, 5 % in weight)(More)
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