Insight into the Role of Oxygen Diffusion in the Sensing Mechanisms of SnO<sub>2</sub> Nanowires
Francisco Hernández-Ramírez(Ajuntament de L’Hospitalet), Joan Daniel Prades(Universitat de Barcelona), Albert Tarancón(Universitat de Barcelona), Sven Barth(Leibniz-Institute for New Materials), Olga Casals(Universitat de Barcelona), R. Jiménez-Díaz(Universitat de Barcelona), Eva Pellicer(Universitat Autònoma de Barcelona), Jordi Rodríguez(Universitat de Barcelona), J.R. Morante(Universitat de Barcelona), Miguel Angel Juli(Ajuntament de L’Hospitalet), Sanjay Mathur(University of Cologne), A. Romano‐Rodrı́guez(Universitat de Barcelona)
Cited by 103
Abstract
Abstract The role of oxygen diffusion in the response of individual SnO 2 nanowires to this gas is studied. Different oxygen partial pressures lead to strong changes of their electrical resistance, even at room temperature. Since surface models fail to explain the experimentally observed long‐term resistance transients, it is necessary to make a description of the interaction mechanisms between oxygen species and SnO 2 nanowires by taking ion diffusion into account. Our model correctly describes the experimentally measured dependence of the nanowire resistance with oxygen partial pressure, and it can be applied to the characterization of other metal oxide materials.
Related Papers
No related papers found
Powered by citation graph analysis