Table 2.
Fitting parameters for Br-PEG-peptide adsorbed on smooth polar surface.
| Adsorption Time: Hydration: |
0.5 hr Hydrated |
2.5 hr Dry |
2.5 hr Hydrated |
10 hr Hydrated |
|---|---|---|---|---|
| Layer 1: Si Substrate | ||||
| Thickness (Å) | 1.00 × 108 | 1.00 × 108 | 1.00 × 108 | 1.00 × 108 |
| Roughness (Å) | 2.7 | 2.7 | 2.7 | 2.7 |
| Relative Density | 1 | 1 | 1 | 1 |
| Layer 2: Polystyrene + Allylamine | ||||
| Thickness (Å) | 248 ± 2 | 250 ± 1 | 249 ± 1 | 248 ± 6 |
| Roughness (Å) | 3.5 ± 0.8 | 3.5 ± 0.5 | 4.0 ± 0.2 | 3.5 ± 0.4 |
| Relative Density | 0.89 ± 0.02 | 0.91 ± 0.06 | 0.98 ± 0.05 | 0.81 ± 0.01 |
| Layer 3: Br-PEG-peptide | ||||
| Thickness (Å) | 116 ± 5 | 140 ± 1 | 156 ± 2 | 449 ± 8 |
| Roughness (Å) | 6 ± 1 | 4 ± 1 | 8 ± 1 | 12 ± 6 |
| Relative Density | 0.87 ± 0.02 | 0.84 ± 0.05 | 0.89 ± 0.02 | 0.64 ± 0.10 |
| Br-Polystyrene Distance (Å) | 108 ± 5 | 129 ± 1 | 141 ± 2 | 332 ± 17 |
| Br Distribution (Å) | 13 ± 2 | 10 ± 1 | 10 ± 0.5 | 92 ± 15 |