H2 sensing behaviour of Palladium nanoparticles (PdNPs) mixed with nafion has been demonstrated as a function of H2 concentration. PdNPs (15 nm diameter) were mixed with nafion (5% solution) and cast over interdigitated micro-electrodes (IDE). Measurements were
carried out at room temperature and change in resistance of the PdNP-nafion film upon exposure to hydrogen was recorded. Pd thin film sensors were used as control. Resistance response studies reveal a unique concentration specific response, exhibiting a pulsed effect (above 1.5%) and a saturated
response (upto 1.5%), for films cast with solution strength of 2.5 mg PdNPs in 10 μl nafion. The characteristic change in the sensing behaviour can be used to develop a sensor to determine the H2 concentration level with high sensitivity and fast response.
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