Study of pH sensors based on TiO2 nanotubes

Author

Monteiro, G.Z. ; Marques, P.A. ; Pereyra, I. ; Albertin, K.F.

Author_Institution

CECS, Univ. Fed. do ABC, Santo Andre, Brazil

fYear

2014

fDate

1-5 Sept. 2014

Firstpage

1

Lastpage

4

Abstract

TiO₂ nanotube arrays obtained by Ti foil anodization are tested as pH electrodes, showing performance close to standard glass electrodes. The TiO₂ nanotube arrays were obtained by Ti foil anodization in a NH₄F organic solution with 20, 40 and 60 V and different anodization times. The obtained nanotubes samples were characterized by Scanning Electron Microscopy (SEM). Electrode modified by TiO₂ nanotubes were characterized in pH buffer solution (pH of 4.0, 7.0 and 10.0) and the obtained results show that electrode modified by NTs obtained with anodization voltage of 40 V with 45 minutes presents an almost linear response close to Nernst equation (59 mV/pH).

Keywords

anodisation; chemical sensors; nanofabrication; nanosensors; pH measurement; scanning electron microscopy; semiconductor growth; semiconductor nanotubes; titanium compounds; wide band gap semiconductors; Nernst equation; SEM; Ti foil anodization; TiO₂; anodization times; anodization voltage; linear response; organic solution; pH buffer solution; pH electrodes; pH sensors; scanning electron microscopy; time 45 min; titania nanotube arrays; voltage 40 V; Anodes; Microscopy; Nanotubes; Platinum; Welding; TiO2 nanotubes; pH sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Microelectronics Technology and Devices (SBMicro), 2014 29th Symposium on

Conference_Location

Aracaju

Type

conf

DOI

10.1109/SBMicro.2014.6940087

Filename

6940087