Ozone gas sensor based on nanocrystalline SrTi1−xFexO3 thin films

Sensors and Actuators B-Chemical Volume: 181 Pages: 919-924 Published: 2013

AFM images of annealed thin film samples for (a) x = 0.00, (b) x = 0.075, (c) x = 0.10 and (d) x = 0.15.

Writers: Valmor R. Mastelaro; Sérgio C. Zílio; Luis F. da Silva; Pedro I. Pelissari; Maria I.B. Bernardi; Jacques Guerin; Khalifa Aguir

Keywords: SrTi1−xFexO3 thin films; Ozone gas sensor; Nanostructure; Electron beam evaporation

Abstract: We report on the use of nanocrystalline SrTi1−xFexO3 (STF) for sensing ozone gas. Amorphous thin films were evaporated by the electron-beam physical vapor deposition technique and then converted to a polycrystalline form, as shown by X-ray diffraction patterns, after ex situ annealing at a relatively low temperature (550 °C). The influence of the iron content on the microstructure was investigated by both scanning electron microscopy (SEM) and atomic force microscopy (AFM), which revealed that the surface roughness of the films increased slightly as the amount of iron increased. Electrical resistance measurements were carried out to determine the response of the films upon exposure to ozone and when compared to other oxide metal sensors, STF films can also be considered as good candidates for application as ozone gas sensors.

See PDF: Ozone gas sensor based on nanocrystalline SrTi1−xFexO3 thin films

DOI: 10.1016/j.snb.2013.02.068

Robson Lima
Sobre Robson Lima 87 Artigos
Atua no Centro de Desenvolvimento de Materiais Funcionais.