| 초록 |
X-ray specula and diffuse scattering were performed on polymer thin films and analyzed the spectra as a function of film thickness and molecular weight. Dynamics of polymer chains in thin film geometry are suppressed due to the weak interaction on the substrate. As previously known, the effects of the substrates propagate to the surface scaled as a radius of gyration, Rg rather than film thickness and films exactly 2Rg thick exhibit brush-like behavior. It will be presented how the dynamics on the films behaves when the interactions are controlled; especially when the substrate is covered by polymeric brushes with different molecular weight. Surface rms roughness will be analyzed as a function of film thickness. It will be shown that the roughness is only a few angstrom scale, which is similar to self-affine behaviors on the brush. |
