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(A) Solid-state 29Si CP/MAS NMR spectra of functionalized silica nanocomposite materials with various amounts of N-diazeniumdiolate-modified AHAM3: (a) 35, (b) 55, and (c) 75 mol% (balance TEOS). (B) Schematic illustration of silicon chemical environments at the surface of N-diazeniumdiolate-conjugated AHAM3/TEOS silica nanoparticles. (C) Plot of percent surface coverage (%SC) of functional ligands vs content of AHAM3/NO adduct precursors loaded during the silica polymerization.
