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ARXPS data for gold surfaces modified with (a) PEG-g-PAMA and (b) PAMA-b-PEG. The inserts illustrate the possible structures of the PEG-polyamine layer on the gold surface, where the PAMA and PEG segments in PEG-g-PAMA are distributed throughout the constructed polymer layer, while the PAMA segments in PEG-b-PAMA are concentrated at the gold surface. (Reproduced with permission from [50] © 2003 American Chemical Society, USA.)
