Induced Pd nanoclustering on SnO/sub 2/ nanoparticles for the enhancement of gas sensor devices

Palladium nanoclusters were observed (HRTEM) on SnO/sub 2/ nanoparticles modified with high dose of Pd. The electrical performances of the sensors coated with this Pd-nanoclustered sensing material reveal an important improvement of the selectivity for CO and CH/sub 4/. As result, CO, CH/sub 4/ and mixtures of them can be distinguished in a wide range of humidity (from 20 to 80%) with a unique sensor working in a pulsed temperature modulation.