In this paper we report a study of the electrical response to NO2, CO, H2O and H2 of a graphene oxide (GO) based gas sensor. The device has been operated in the temperature range 25– 200◦C at different gases concentrations (1–200 ppm). Micro structural physical features of the GO sensing films were characterized by Raman and X-Ray Photoelectron Spectroscopy, and by Scanning Electron Microscopy. The GO based sensor has shown high sensitivity to NO2 (down to 1 ppm) at 150◦C operating temperature, analogous to a p-type response mechanism of inorganic gas sensors. The NO2 adsorption/desorption has been found to be reversible, but with increasing desorption time when decreasing the operational temperature. Negligible response to CO, H2 and v has been observed. The observed gas sensing performance of the GO based sensor is similar to the best one reported in literature for carbon nanotubes.
CITATION STYLE
Cantalini, C., Giancaterini, L., Treossi, E., Palermo, V., Perrozzi, F., Santucci, S., & Ottaviano, L. (2012). Electrical response of GO gas sensors. In Carbon Nanostructures (Vol. 0, pp. 17–25). Springer International Publishing. https://doi.org/10.1007/978-3-642-20644-3_3
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