Fine water discharging element, fine water discharge device and method for manufacturing fine water discharging element

A fine water discharging element capable of transitioning between an adsorption state where water contained in a fluid to be treated is adsorbed and a discharge state where the adsorbed water is discharged to the fluid to be treated, the fine water discharging element comprising:

• a base material portion;
• a plurality of particles having a core-shell structure including a core portion forming a nucleus and a shell portion formed of a polymer material having a polar functional group capable of hydrogen bonding to cover the core portion;
• and
• a nanochannel smaller in width than said particles, is formed between the shell portions of the plurality of particles by laminating the plurality of particles on an outer surface of the base material portion in a film shape, wherein
• the fine water discharging element is transitioned between the adsorption state and the discharged state by changing the temperature of the water in the nanochannel by controlling an electrifying of at least one of the base material portion and the plurality of particles.