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. Author manuscript; available in PMC: 2012 Oct 1.
Published in final edited form as: Biomaterials. 2011 Jul 18;32(30):7491–7502. doi: 10.1016/j.biomaterials.2011.06.032

Figure 4. AFM scratch test and roughness of (PrS/SPS)n PEMs surfaces.

Figure 4

AFM line scans (a and b) across the scratched (PrS/SPS)40 and (PrS/SPS)240 PEMs showed complete coverage of the substrate surface by the nanoscale thin films. (c) The RMS roughness values of the films were dependent on the thickness (bilayer number). (d) Magnification of lower n region of part b showing the decrease in RMS roughness as n increased from 20 to 100 bilayers.