Table 1 The elemental composition of dried MNPs and their relative atomic concentration were studied by exciting the MNPs to mono-energetic Al kα x-rays and measuring the energy of photoelectrons emitted by electron energy analyser (ESCALAB250 XPS analyser)
Sample | Relative atomic mass (%) | ||||
|---|---|---|---|---|---|
Fe | O | C | N | Cl | |
MNPs | 24.8 | 48.4 | 26.8 | – | – |
PDA-MNPs | – | 24.0 | 69.5 | 6.5 | – |
Van-PDA-MNPs | – | 23.3 | 65 | 10.2 | 1.5 |