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Contact mode AFM images of (A) 45 mol% N-diazeniumdiolate-modified AHAP3, (B) 35 mol% N-diazeniumdiolated AEAP3, and (C) 45 mol% N-diazeniumdiolated AHAM3 silica particles (all balance TEOS) on a mica surface. (D) Enlargement of a single particle from (C).
