| Autor: |
Xu, T., Goldbach, J. T., Misner, M. J., Kim, S., Gibaud, A., Gang, O., Ocko, B., Guarini, K. W., Black, C. T., Hawker, C. J., Russell, T. P. |
| Zdroj: |
Macromolecules; April 2004, Vol. 37 Issue: 8 p2972-2977, 6p |
| Abstrakt: |
A selective solvent induced surface reconstruction of thin films of an asymmetric diblock copolymer of poly(styrene-b-methyl methacrylate) was investigated by grazing incidence small-angle X-ray scattering, X-ray reflectivity, and atomic force microscopy. It is quantitatively shown that the selective swelling of the minor component results in the formation of a nanoporous film where the initial hexagonal array of the copolymer is preserved without affecting the lattice constant, 40.7 nm. However, the film thickness increased by ~17%, and the average electron density decreased by ~20%. The electron density profiles obtained by fitting the X-ray reflectivity indicate that the pores penetrate through the entire film and that the pores are oriented normal to the surface. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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