Figure 5

EDX and XPS analyses of HPAMAM particles of P-M _12/8 S _0.5 R _1k after Cu²⁺ absorption: (a) collected area on the bare surface, (b) collected area on the cutting plane, (c) element analysis data, and (d) XPS spectra of the N_1s region of P-M _12/8 S _0.5 R _1k before (black line) and after (red line) Cu²⁺ absorption.