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Figure 9


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AFM topography (left column) and mechanical phase (right column) of Au samples of (a) 2.8 nm, (b) 15 nm and (c) 41 nm thickness. The 2.8 nm layers show discrete gold nanoparticles on the substrate. At 15 nm, these particles coalesce into a uniform layer showing distinct grains, and when the layer thickness further increases to 41 nm the grain size likewise increases.

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