Titanium Oxide Nanorods pH Sensors: Comparison between Voltammetry and Extended Gate Field Effect Transistor Measurements - Materials Sciences and Applications

MSA > Vol.5 No.7, May 2014

Volume 5, Issue 7 (May 2014)

ISSN Print: 2153-117X ISSN Online: 2153-1188

Google-based Impact Factor: 1.34 Citations

Titanium Oxide Nanorods pH Sensors: Comparison between Voltammetry and Extended Gate Field Effect Transistor Measurements ()

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Download as PDF (Size: 1323KB) PP. 459-466

DOI: 10.4236/msa.2014.57049 5,910 Downloads 8,279 Views Citations

Author(s)

Elidia Maria Guerra, Marcelo Mulato

Affiliation(s)

Department of Chemistry, Biotechnology and Bioprocess Engineering, Federal University of S?o Jo?o Del Rei, Ouro Branco, Brazil.
Department of Physics, S?o Paulo University, Ribeir?o Preto, Brazil.

ABSTRACT

In recent years there has increased interest in the characterization of titanium oxide nanorods for application in analytical devices. The titanium oxide nanorods (NRTiO) were obtained by hydrothermal reaction with a NaOH solution heated in the autoclave at 150°C for up to 50 h. Experimental data indicate that the prepared nanorods consist of anatase and rutile phases, with a possible interlayer structure. The NRTiO was investigated as pH sensor in the pH range 2 - 12, and the extended gate field effect transistor (EGFET) configuration presented a sensitivity of 49.6 mV/pH. Voltammetric data showed a sensitivity of 47.8 mV/pH. These results indicate that the material is a promising candidate for applications as an EGFET-pH sensor and as a disposable biosensor in the future.

KEYWORDS

Titanium Oxide Nanorods, pH Sensors, EGFET, Voltammetry

Share and Cite:

Guerra, E. and Mulato, M. (2014) Titanium Oxide Nanorods pH Sensors: Comparison between Voltammetry and Extended Gate Field Effect Transistor Measurements. Materials Sciences and Applications, 5, 459-466. doi: 10.4236/msa.2014.57049.

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