Abstract
Thin supported polystyrene- fullerene mixtures annealed above their glass transition temperature develop spinodal surface undulations which depend on film thickness , polymer molecular mass , temperature, and time . The dominant wavelength scales linearly with and coarsening kinetics follow , with ; the morphology eventually pins at long times. This spinodal surface excitation contrasts with dewetting suppression and film stability observed in low- polymers and results from the interplay of binary miscibility and fullerene substrate attraction.
- Received 23 October 2009
DOI:https://doi.org/10.1103/PhysRevLett.105.038301
©2010 American Physical Society