Table 5.
XPS determined carbon species from high-resolution C1s spectra (with standard deviations in parenthesis) for 14nm AuNP and flat Au surfaces with C6, C8, C11 and C16 COOH-SAMs.
| 14nm | Flat Au | ||||
|---|---|---|---|---|---|
| Adj. B.E. (eV) | Group % (Std. Dev.) | Adj. B.E. (eV) | Group % (Std. Dev.) | ||
| Hydrocarbon (C–C/C–H) | C16 | 285.0 | 82 (2) | 285.0 | 87 (2) |
| C11 | 285.0 | 78 (3) | 285.0 | 82 (1) | |
| C8 | 285.0 | 77 (3) | 285.0 | 77 (1) | |
| C6 | 285.0 | 72 (3) | 285.0 | 74 (0) | |
|
| |||||
| *C–COOH & C–S | C16 | 286.1 | 12 (2) | 286.1 | 7 (2) |
| C11 | 286.1 | 13 (2) | 286.1 | 8 (1) | |
| C8 | 286.3 | 13 (1) | 286.1 | 11 (0) | |
| C6 | 286.1 | 14 (1) | 286.1 | 14 (0) | |
|
| |||||
| O=C–O | C16 | 289.8 | 6 (0) | 289.7 | 6 (0) |
| C11 | 289.6 | 9 (2) | 289.4 | 10 (0) | |
| C8 | 289.9 | 9 (2) | 289.1 | 12 (1) | |
| C6 | 288.7 | 14 (2) | 289.1 | 12 (0) | |