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XPS determined composition for the methyl and carboxyl SAM acquired in electrostatic mode at a take-off angle of 0°. These values were used in the theoretical calculations of XPS composition for LKα14 and LKβ15 peptide monolayers and bilayers. (Data not renormalized).
| C (atomic %) | O (atomic %) | S (atomic %) | Au (atomic %) | |
|---|---|---|---|---|
| Methyl SAM | 46.6 | 0 | 2.0 | 51.5 |
| Carboxyl SAM | 43.6 | 10.0 | 2.0 | 44.4 |
