Abstract

Hydrogen sensing curves of Palladium thin film and nanoparticles layers during a complete loading and deloading cycle have been investigated. The curves shows increase in resistance during loading and decrease in resistance during deloading as expected in the case of thin film sample. The value of resistance first increases and then slowly decreases in case of nanoparticles layer sample during hydrogen loading. The increase in resistance is due to the electronic effect (EE) and decrease in resistance is due to geometric effect (GE). This characteristic behavior of nanoparticles is reported as pulse like nature. The result shows that nanoparticles layers show better response towards hydrogen sensing than thin film.

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