Lateral Ordering of Cylindrical Microdomains Under Solvent Vapor
The development of the morphology in asymmetric polystyrene-block-poly(4-vinylpyridine) (PSb- P4VP) thin films in tetrahydrofuran (THF) vapor, a selective solvent for majority PS block, as a function of time was investigated by scanning force microscopy (SFM) and grazing incidence small-angle X-ray scattering (GISAXS). When the PS-b-P4VP films were spin-coated from a toluene/THF mixture onto a silicon substrate, cylindrical microdomains were found to be oriented normal to the surface. By annealing under the THF solvent vapor, the distribution of the size and center-to-center distance between the cylindrical microdomains were significantly narrowed. The orientation and grain size of the cylindrical microdomains in the annealed films were characterized using Moire´ analysis obtained from SFM scan. GISAXS was used to characterize the morphology of the entire film.
- Research Organization:
- Brookhaven National Laboratory
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 970413
- Report Number(s):
- BNL--90145-2009-JA; KC0202010
- Journal Information:
- Macromolecules, Journal Name: Macromolecules Journal Issue: 4 Vol. 42
- Country of Publication:
- United States
- Language:
- English
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