Effect of solvent annealing on the nano- and micro-structure of block copolymer thin film

Eva Oktavia Ningrum, Chien Chih Chang, Chieh Tsung Lo

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The development of structure of symmetric polystyrene-b-poly(2 vinyl pyridine) (PS-PVP) thin film annealed under a neutral solvent vapor was investigated by atomic force microscopy and optical microscopy. Initially, spin cast film showed a micellar structure. With subsequent neutral solvent vapor treatment, a lamellar structure gradually developed. It was found that the structural evolution of the thin film was a strong function of the quantity of solvent diffused into the film. In addition, with an increase in swelling, the orientation of the lamellae changed from parallel to perpendicular. During solvent annealing, the solvent also induced dewetting via primary and secondary heterogeneous nucleation processes, depending on the quantity of solvent in the film. Secondary nucleation was independent of primary nucleation for lower solvent concentration. With higher amount of solvent, the solvent expedited secondary nucleation, and it occurred within the dewetted area caused by primary nucleation.

Original languageEnglish
Pages (from-to)1298-1312
Number of pages15
JournalJournal of Macromolecular Science, Part B: Physics
Volume50
Issue number7
DOIs
Publication statusPublished - 2011 Jul 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Effect of solvent annealing on the nano- and micro-structure of block copolymer thin film'. Together they form a unique fingerprint.

Cite this