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(1) A schematic drawing of the two-step pNaSS grafting procedure: first surface modification by attaching a monolayer of MPS molecules and then pNaSS grafting from the modified surface using ATRP (the methacrylate tails of the silane cross linkers covalently bond to the carbon double bond (C=C) of the NaSS monomers. (2) Key ToF-SIMS fragments are noted for each step.
