Figure 6: Particle diffusion on the colloidal monolayer.

(a) A positional probability map of multiple particles on the monolayer with a butterfly-like distribution enlarged in the insert. Scale bar, 3 μm. (b) Side and top views of the lowest surface that the top particle centre can explore. The red dash line is defined as the hill-to-valley line with hill, basin and valley regions indicated by different colours.