Table 1.
Elemental analyses of mixed polymer brushes grafted glass substrates via X-ray photoelectron spectroscopy at a take-off angle of 15°.
| Code | Atom (%) |
N/C ratio | Si/O ratio | ||||
|---|---|---|---|---|---|---|---|
| C | N | O | Si | Cl | |||
| PN | 76.3 | 12.1 | 11.6 | n.d. | n.d. | 0.158 | 0 |
| PN-PD-0 | 61.1 | 7.2 | 21.6 | 10.1 | n.d. | 0.118 | 0.468 |
| PN-PD-12.5 | 60.2 | 7.4 | 21.5 | 11.0 | n.d. | 0.123 | 0.512 |
| PN-PD-25.0 | 66.2 | 8.5 | 21.5 | 8.0 | n.d. | 0.128 | 0.372 |
| PN-PD-37.5 | 64.4 | 9.7 | 18.9 | 7.0 | n.d. | 0.151 | 0.370 |
| PNIPAAma | 75.0 | 12.5 | 12.5 | – | – | 0.167 | – |
| PDMAPAAma | 72.7 | 18.2 | 9.09 | – | – | 0.250 | – |
| CPTMSa | 70.6 | – | 17.6 | 5.88 | 5.88 | – | 0.333 |
| glass substratea | – | – | 66.7 | 33.3 | – | – | 0.500 |
a
Theoretical atomic compositions of each polymer, initiator, and glass substrate.