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(A) AFM topography and (B) phase image of collagen impregnated with propolis NPs. (C) Cross-section of the line profiles shown in (A). (D) AFM topography image of collagen impregnated with propolis NPs. (E) Amplitude image of the topography image shown in (D). (F) Cross-section of the line profiles shown in (E). The collagen D-pattern gap was increased.
