Observed frustration in confined block copolymers

Journal Article · Mon May 02 00:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.2899· OSTI ID:7207443

Lambooy, P; Russell, T P ^[1]; Kellogg, G J; Mayes, A M ^[2]; Gallagher, P D; Satija, S K ^[3]

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1. IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099 (United States)
2. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
3. Reactor and Radiation Division, National Institute for Standards Technology, Gaithersburg, Maryland 60439 (United States)

Symmetric diblock copolymers confined between two solid surfaces were studied by neutron reflectivity. A multilayered morphology with an integral number of layers oriented parallel to the solid interfaces was found in all cases. The period of the confined multilayers deviated from the bulk period in a cyclic manner as a function of the confined film thickness. A first-order transition occurred between the expanded and contracted states of the copolymer chains. The data suggest that the deviation of the period from the bulk value decreases with increasing separation distance.

• DOE Contract Number: FG03-88ER45375
• OSTI ID: 7207443
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:18; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
665100 -- Nuclear Techniques in Condensed Matter Physics -- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COHERENT SCATTERING
CONFINEMENT
COPOLYMERS
DIFFRACTION
FILMS
INTERFACES
LAYERS
MORPHOLOGY
NEUTRON DIFFRACTION
ORDER-DISORDER TRANSFORMATIONS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHASE TRANSFORMATIONS
POLYMERS
SCATTERING
SURFACE PROPERTIES
THIN FILMS