Berlin 2001 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 4: Thin Polymer Films
CPP 4.5: Vortrag
Dienstag, 3. April 2001, 17:05–17:25, 111
Thin diblock copolymer films: Long range correlation and dewetting — •P. Müller-Buschbaum1, J. S. Gutmann2, M. Stamm2, and W. Petry1 — 1TU München Physik Department LS E13, James-Franck-Str.1, 85747 Garching — 2IPF Dresden, Hohe Str. 6, 01069 Dresden
diblock copolymer films on top of silicon substrates were examined right after preparation and during annealing. The stability with respect to the annealing above the micro phase separation temperature was investigated on long time scales. A roughness correlation between the substrate and the copolymer surface within a limited film thickness and molecular weight range as compared to homopolymers [1, 2] was detected. During annealing the energetically unfavourable roughness replication decayed. At a film thickness below the lamellar spacing of the bulk material dewetting was observed. The kinetics of film destabilization were explainable within the spinodal dewetting model.
[1] P. Müller-Buschbaum, M. Stamm, Macromolecules 31, 3686 (1998)
[2] P. Müller-Buschbaum,
J. S. Gutmann, J. Kraus, H. Walter, M.
Stamm, Macromolecules 33, 569 (2000)