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AFM topography and recognition images of natural plant cell walls. Topography (a-f) and recognition (g-l) images of natural poplar (P), switchgrass (SG), and corn stover (CS). (a, c, e, g, i, k) show the representative surface area mainly covered by lignin and (b, d, f, h, j, l) show the representative surface area mainly covered by crystalline cellulose.
