To fully activate the precursors, the I-BOPHY-I/Au(111) system was annealed at 370 K. Figure and Figure show STM images of the surface after the thermal treatment, where two phases coexist: i) linear molecular nanostructures self-assembled into islands, and ii) a surrounding nanoporous network. Figure shows one of the islands, where elongated features are detected (green circle) together with rounded features of two different sizes (blue and red circles). From the image, it is possible to discern a periodicity along the elongated chain slabs of approximately 1.27 nm, in good agreement with half of the I-BOPHY-Au-BOPHY-I distance in the dimers detected at RT.