Table 1 Relative (%) atomic concentration of C and Si species.
C1s | Si2p | |||
|---|---|---|---|---|
Component/BE (±0.1 eV) | Graphene [± 0.5 %] | Graphene/SiOx [± 0.5 %] | Component/BE (±0.1 eV) | Graphene/SiOx [± 1.0 %] |
C–C sp2/284.5 | 75.1 | 71.4 | -Si-O-C- 102.1 | 18.1 |
C–C sp3/285.4 | 10.4 | 11.6 | ||
C–O/286.5 | 8.0 | 10.1 | SiO2 103.4 | 56.2 |
C=O/287.9 | 3.4 | 2.1 | ||
COOH/289.3 | 1.4 | 2.1 | Si-(OH)x, x≈2 104.9 | 25.7 |
π–π* satellite /~291 | 1.7 | 2.7 | ||