BSE SEM images of (a) Au NPs deposited by spin coating on a TiO2/ITO substrate; and (b) after the deposition of the overlying F127-directed TiOx/P3PBT mesostructure active layer. The Au NPs maintain their location and size and can be seen under the mesostructured layer and through a crack.

BSE SEM images of (a) Au NPs deposited by spin coating on a TiO2/ITO substrate; and (b) after the deposition of the overlying F127-directed TiOx/P3PBT mesostructure active layer. The Au NPs maintain their location and size and can be seen under the mesostructured layer and through a crack.