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Surface topology of layer-by-layer film.
Notes: (A) The morphology of layer-by-layer films (bilayer 0 to bilayer 8) of sodium hyaluronate and chitosan/siRNA nanoparticles studied by atomic force microscopy. (B) The plot of calculated average roughness (Sa) versus the number of bilayers. The film was built up on the same specimen and five random spots on each bilayer were scanned.
