TY - JOUR
T1 - Insight into the role of oxygen diffusion in the sensing mechanisms of SnO2 nanowires
AU - Hernandez-Ramirez, Francisco
AU - Prades, Joan Daniel
AU - Tarancon, Albert
AU - Barth, Sven
AU - Casals, Olga
AU - Jimenez-Diaz, Roman
AU - Pellicer, Eva
AU - Rodriguez, Jordi
AU - Morante, Joan Ramon
AU - Juli, Miguel Angel
AU - Mathur, Sanjay
AU - Romano-Rodriguez, Albert
PY - 2008/10/9
Y1 - 2008/10/9
N2 - 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.
AB - 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.
U2 - 10.1002/adfm.200701191
DO - 10.1002/adfm.200701191
M3 - Article
SN - 1616-301X
VL - 18
SP - 2990
EP - 2994
JO - Advanced Functional Materials
JF - Advanced Functional Materials
ER -