Morphology change of asymmetric diblock copolymer micellar films during solvent annealing

Xue Li, Juan Peng, Yan Wen, Dong Ha Kim, Wolfgang Knoll

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

The morphology change of an asymmetric polystyrene-block-poly(2-vinyl pyridine) (PS-b-PVP) diblock copolymer micellar film was investigated during solvent vapor annealing in chloroform. Initially, smaller islands in nanometer-length scale form at the film surface. Further annealing results in the growth of the islands composed of the PS-b-PVP cylinders above the bottom brush layer. For comparison, a film of the block copolymer prepared from THF solution (without micellar structure) was also studied. The surface morphology of the film from THF evolves via spinodal dewetting mechanism during solvent vapor annealing. At a long time solvent vapor annealing, the two kinds of the films display the same surface morphologies, which are determined by the interplay between the surface field and autodewetting.

Original languageEnglish
Pages (from-to)2434-2443
Number of pages10
JournalPolymer
Volume48
Issue number8
DOIs
StatePublished - 5 Apr 2007

Keywords

  • Asymmetric diblock copolymer
  • Morphology change
  • Solvent annealing

Fingerprint

Dive into the research topics of 'Morphology change of asymmetric diblock copolymer micellar films during solvent annealing'. Together they form a unique fingerprint.

Cite this