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Imaging by AFM of glass coverslips coated with BSA alone (right panel) or with BSA and 5 nm colloidal gold (left panel). The images were recorded in tapping mode and represent the height range in false colors with maximal height of 10 nm (brightness scale on the right). Notice that gold particles appear slightly bigger than their actual size of 5 nm due to the resolution limits of the cantilever. Scale bar = 100 nm.
