Observed surface energy effects in confined diblock copolymers
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
- IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099 (United States)
- Reactor and Radiation Division, National Institute for Standards and Technology, Gaithersburg, Maryland 60439 (United States)
By using thin layers of random copolymer, we have varied the specificity of block-wall interactions for films of diblock copolymer confined between parallel walls. For highly specific interactions (bare walls), one block component segregates to both interfaces, and the frustration due to incommensuration between film thickness and the diblock{close_quote}s bulk period is accommodated by the formation of layers parallel to the walls with perturbed period. In contrast, reduced specific interactions (random-copolymer-coated walls) allow the frustration to be accommodated by perpendicular ordering of the diblock, such that both block components are present at the walls. {copyright} {ital 1996 The American Physical Society.}
- DOE Contract Number:
- FG03-88ER45375
- OSTI ID:
- 286092
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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