INVESTIGADORES
CASTRO Miriam Susana
congresos y reuniones científicas
Título:
Capacitance analysis of Pd-doped SnO2 thick films sensors exposed to CO atmospheres
Autor/es:
MA PONCE; RJ FENOGLIO; MS CASTRO; CM ALDAO
Lugar:
Foz do Iguazú
Reunión:
Congreso; III Encontro da SBPMat; 2004
Institución organizadora:
SBPMat
Resumen:
It was found that resistance and capacitance of SnO2 thick-films are modified by CO adsorption at the grain surface. In particular, the capacitance response to a CO atmosphere was studied. In the analysis, the presence of Schottky potential barriers at the grain boundaries was considered to be responsible for the obseved results. An increasing of the capacitance with time can be related to the reaction of CO with the previous oxygen adsorbed at the grains surface. Also, we found that other mechanisms affect the sensor response.
