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Roughness for (PDADMAC + PSS)N multilayers at different ionic strengths (dry films).
| cNaCl [M] | N | roughness [nm] | technique |
| 0.10 | 3 | 6 ± 2 | X-ray reflectivity |
| 6 | 3.8 ± 0.5 | AFM | |
| 6 | 6 ± 1 | X-ray reflectivity | |
| 9 | 4 ± 1 | X-ray reflectivity | |
| 12 | 5 ± 1 | X-ray reflectivity | |
| 15 | 7.8 ± 0.5 | AFM | |
| 15 | 6 ± 2 | X-ray reflectivity | |
| 0.50 | 12 | 12.1 ± 0.5 | neutron reflectivity |
| 1.00 | 7 | 17.8 ± 0.5 | AFM |
