Table 7.
XPS determined carbon species from high-resolution S2p spectra (with standard deviations in parenthesis) for 14nm AuNP and flat Au surfaces with C6, C8, C11 and C16 COOH-SAMs on 14nm AuNP and flat Au.
| 14nm | Flat Au | ||||
|---|---|---|---|---|---|
| Adj. B.E. (eV) | Group % | Adj. B.E. (eV) | Group % | ||
| Bound Sulfur | C16 | 161.9 | 100 | 161.9 | 100 |
| C11 | 162.2 | 100 | 162.0 | 100 | |
| C8 | 162.1 | 100 | 161.9 | 100 | |
| C6 | 161.8 | 90 | 162.0 | 91 | |
|
| |||||
| Unbound Sulfur | C16 | nd | nd | nd | nd |
| C11 | nd | nd | nd | nd | |
| C8 | nd | nd | nd | nd | |
| C6 | 163.8 | 10 | nd | nd | |
|
| |||||
| Oxidized Sulfur | C16 | nd | nd | nd | nd |
| C11 | nd | nd | nd | nd | |
| C8 | nd | nd | nd | nd | |
| C6 | nd | nd | 169.3 | 9 | |
nd = not detected