The present invention consists of a layered coating structure containing a photocatalytic material in the
form of a thin film (which can be titanium dioxide, or other similar photocatalytic material), which upon
solar illumination initiates redox mechanisms that are efficient in opening by degrading/dissociating the
polymeric walls of the nano or microcapsules that are adsorbed on photocatalytic material surface, promoting subsequently the controlled release of a volatile agent. The nano or microcapsules,
which are adsorbed on the photocatalytic coating, are of polymeric nature, having a wall thickness of few
nanometers that can be degradable by means of solar light.
After the depletion of the micro or nanocapsules that host the volatile agent, the photocatalytic surface can
be replenished or recharged by simple spraying an aerosol containing the mentioned micro or
nanocapsules. It is important to note that after the photocatalytic material is deposited on a particular
surface (e.g. glass window, lamps, furniture, tiles, cloth, net, etc.) there is no need to deposit it again, only
to replenish the surface occasionally with the nano or microcapsules hosting the volatile agents to be
released.

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