In the present work, we have synthesized single crystalline In2O3octahedra via a vapour phase transport at high temperatures over Si/SiO2substrates. Gas sensing measurements (NO2) have been performed under temperature variations and UV irradiation. Optimum working conditions for each case have been found. A comparison between nanostructured In2O3and commercial In2O3powder has been performed in order to show the advantages of using a nanostructured based sensor. As a result, the detection of low concentrations of NO2(50 ppb) has found to be possible with sensitivities for higher concentrations comparable to those shown in recent publications.
Gonzalez, O., Roso, S., Calavia, R., Vilanova, X., & Llobet, E. (2015). NO2 sensing properties of thermally or UV activated In2O3 nano-octahedra. In Procedia Engineering (Vol. 120, pp. 773–776). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2015.08.817