Dodecane sensing with double substituted LaCoO_3 nanowires deposited by reactive magnetron sputtering

摘要

This paper reports results of dodecane-sensing studies with double-substituted LaCoC_3 perovskite oxide nanowires. La_(0.40)Sr_(0.15)Ag_(0.45)Co)O_(3-α)nanowires were co-sputtered from metallic La, Sr, Ag and Co targets in the presence of a reactive argon-oxygen gas mixture. As deposited coatings are amorphous and crystallise in the perovskite structure after annealing at 873 K for 2 hours under air. Electrical response of the La_(0.40)Sr_(0.15)Ag_(0.45)Co)O_(3-α), nanowires was measured at different temperature under air and under air containing 1 to 100 ppm (v) of dodecane vapour. The electrical signal of the nanowires was found to be high and it was possible to detect low concentrations of dodecane (under 5 ppm (v)) at 573 K.