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Figure 6


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AFM mechanical phase measurements of Ag samples of various thicknesses. In (a)–(d), a dark background is seen between the nanoparticles, as they are isolated on the Si + SiO2 substrate. In (e)–(i) (11 nm and above), the dark background cannot be seen, confirming the presence of a continuous layer of Ag with grains formed on top. Nominal layer thickness: (a) 1.1 nm, (b) 3.4 nm, (c) 5.7 nm, (d) 7 nm, (e) 11 nm, (f) 14.1 nm, (g) 21 nm, (h) 30 nm and (i) 50 nm.

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