Figure 2

Typical SEM images at lower and higher (inset with scale bar of 2 µm) magnification of the self-assembled PS on glass substrate and the resulting PDMS film with impregnated nanocups sputtering with Au layer. (Top) The monolayer of the self-assembled PS with four different diameters used as templates to obtain nanocups on the flexible PDMS film. (Bottom) the corresponding Au-coated PDMS nanocups platforms.