Insight into the role of oxygen diffusion in the sensing mechanisms of SnO<inf>2</inf> nanowires

Francisco Hernandez-Ramirez, Joan Daniel Prades, Albert Tarancon, Sven Barth, Olga Casals, Roman Jimenez-Diaz, Eva Pellicer, Jordi Rodriguez, Joan Ramon Morante, Miguel Angel Juli, Sanjay Mathur, Albert Romano-Rodriguez

Research output: Contribution to journalArticleResearchpeer-review

89 Citations (Scopus)

Abstract

The role of oxygen diffusion in the response of individual SnO2 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 SnO2 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. © 2008 WILEY-VCH Verlag GmbH & Co. KGaA.
Original languageEnglish
Pages (from-to)2990-2994
JournalAdvanced Functional Materials
Volume18
DOIs
Publication statusPublished - 9 Oct 2008

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