Table 2. Structural Parameters Obtained from Fitting PNR Data for a Silicon–Permalloy–Steel Substrate before and after Incubation with PNAM100-b-(PLA40)100,36% (C2)a.
| layer | SLD (×10–6 Å–2) | thickness (Å) | solvation (%) | roughness (Å) |
|---|---|---|---|---|
| Si | 2.07* | 0* | 4+2–1 | |
| SiO2 | 3.47* | 30+2–2 | 0* | 11+1–1 |
| permalloy ↑ | 10.19+0.03–0.03 | 137+1–1 | 0* | 10+1–1 |
| permalloy ↓ | 6.73+0.03–0.03 | |||
| steel | 6.27+0.03–0.02 | 260+1–2 | 0* | 11+1–1 |
| oxide | 0.36+0.65–0.35 | 15+2–2 | 7.0+9–7 | 9+1–1 |
| PNAM | 1.26* | 47+7–7 | 67+4–4 | 19+1–2 |
| PLA | 0.14* | 156+21–22 | 95+1–1 | 16+4–10 |
| n-dodecane | –0.53+0.07–0.03 | |||
| n-dodecane-d26 | 5.94+0.01–0.01 |
a
The substrate was first characterized with both solvent contrasts using spin-up (↑) and spin-down (↓) neutrons. Fitted parameters marked with asterisks were then fixed for analysis after incubation with polymer. Error values were calculated from the 95% confidence intervals estimated from the Markov chain Monte Carlo analysis.