TiO₂ nanotube-based gas sensor at room temperature

Authors

Marleane Rovi Ferrer ⋅ PH National Institute of Physics, University of the Philippines Diliman
Julie Ann Lebitania ⋅ PH National Institute of Physics, University of the Philippines Diliman
Laureen Ida Ballesteros ⋅ PH National Institute of Physics, University of the Philippines Diliman
Christopher Jude Vergara ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

Titanium dioxide nanotubes were fabricated via anodization process. The surface morphology of the nanotubes was observed using Field Emission Scanning Electron Microscopy. The alcohol-sensing ability at room temperature of the fabricated TiO₂ nanotubes was studied using methanol, ethanol and 2-propanol as analyte gases. The response was determined by measuring the electrical resistance of the material. Resistance of TiO₂ decreased in the presence of reducing alcohol vapors. Fastest response was observed for methanol while slowest for 2-propanol. Though the sensor showed small changes in resistance values and the response was relatively slow, which can be accounted to the low operating temperature, it was able to respond in the presence of the analyte gases and recover after testing at room temperature.

Downloads

Issue

2012: Proceedings of the 30th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP2012-4A-1

Section

Instrumentation Physics

Published

2012-10-22

How to Cite

[1]

MR Ferrer, JA Lebitania, LI Ballesteros, and CJ Vergara, TiO2 nanotube-based gas sensor at room temperature, Proceedings of the Samahang Pisika ng Pilipinas 30, SPP2012-4A-1 (2012). URL: https://proceedings.spp-online.org/article/view/SPP2012-4A-1.