Relation Between Water Status On Micro/Nano Gap Between Galvanic Arrays And Flowing Current Around 100% In Relative Humidity

Behavior of water droplets at around 100%RH (relative humidity) was examined using developed galvanic arrays with micro/nano gap. Experimental results showed that the response current detected while observing arrays and gap surfaces depended on the variation of RH according to the adsorption behavior of water droplets. At 100%RH, response current showed a steady value determined by the equilibrium between the condensation of liquid phase and the evaporation of vapor phase. These results indicated that, once the liquid water was formed on the sensor surface above 100%RH, the response current that depended on the water droplet's size could be estimated kinetically.