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TEM images showing (a) Au film (100 nm) (left) with a magnified view of the section highlighted by the dashed lines shown on the right. In the magnified view, the dashed lines are used to highlight the grains within the film which have an average diameter of 40 ± 9 nm, and (b) several Au 500 nanoparticles (left) with a magnified view of a single nanoparticle with the grains highlighted by the dashed lines (right). The average grain diameter was found to be 96 ± 30 nm.
