Table 2.
Ellipsometry data for grafted surfaces.
| Surface | Mn (g/mol) | Density ρ (g/mL) | Measured Thickness h (nm) | Chain Density σ = (hρ/Mn) × NA (chains/nm2) | Chain Spacing D = (4/πσ)1/2 (nm) | PEO Flory Spacing 2Rf = 2aN3/5 (nm) | Siloxane Flory Spacing 2Rf = 2aN1/3 (nm) |
|---|---|---|---|---|---|---|---|
| Siloxane-control | 1286 | 1.01 | 2.5 ± 0.9 | 1.2 ± 0.4 | 1.1 ± 0.2 | n/a | 2.4 |
|
| |||||||
| PEO-control (n = 3) | 368 | 1.04 | 0.6 ± 0.1 | 1.0 ± 0.2 | 1.1 ± 0.1 | 1.4 | n/a |
| PEO-control (n = 8) | 588 | 1.13 | 2.3 ± 0.2 | 2.6 ± 0.2 | 0.70 ± 0.03 | 2.4 | n/a |
| PEO-control (n = 16) | 940 | 1.16 | 1.2 ± 0.2 | 0.9 ± 0.2 | 1.2 ± 0.1 | 3.7 | n/a |
|
| |||||||
| Amphiphile (n = 3) | 1490 | 1.04 | 2.1 ± 0.2 | 0.9 ± 0.1 | 1.2 ± 0.1 | 1.4 | 2.4 |
| Amphiphile (n = 8) | 1710 | 1.13 | 1.7 ± 0.2 | 0.6 ± 0.1 | 1.4 ± 0.1 | 2.4 | 2.4 |
| Amphiphile (n = 16) | 2062 | 1.04 | 3.1 ± 0.8 | 0.9 ± 0.2 | 1.2 ± 0.1 | 3.7 | 2.4 |