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Interlayer Diffusion in Langmuir-Blodgett Multilayers

Published online by Cambridge University Press:  25 February 2011

Mark D. Foster ,
Timothy R. Vierheller ,
Albert Schmidt ,
Klemens Mathauer ,
Wolfgang Knoll ,
Gerhard Wegner ,
Sushil Satija  and
Charles Majkrzak
Mark D. Foster
Affiliation:
Department of Polymer Science, The University of Akron, Akron, Ohio 44325-3909
Timothy R. Vierheller
Affiliation:
Department of Polymer Science, The University of Akron, Akron, Ohio 44325-3909
Albert Schmidt
Affiliation:
Max-Planck-Institut für Polymerforschung, D-6500 Mainz 1, Germany
Klemens Mathauer
Affiliation:
Max-Planck-Institut für Polymerforschung, D-6500 Mainz 1, Germany
Wolfgang Knoll
Affiliation:
Max-Planck-Institut für Polymerforschung, D-6500 Mainz 1, Germany
Gerhard Wegner
Affiliation:
Max-Planck-Institut für Polymerforschung, D-6500 Mainz 1, Germany
Sushil Satija
Affiliation:
Max-Planck-Institut für Polymerforschung, D-6500 Mainz 1, Germany
Charles Majkrzak
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD 20899.
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Abstract

Interlayer diffusion in Langmuir-Blodgett multilayers containing Cadmium Arachidate (CdA), polyglutamate (PG) copolymers, or both, was investigated using neutron and x-ray reflectometry. Measurements from multilayers comprised only of CdA or PG revealed that little interdiffusion occurred upon annealing at 70°C or 84°C. However, some relaxation of the intralayer microstructure in the PG samples was observed at both temperatures. In contrast, the neutron reflectivity of a multilayer sandwich containing a bilayer of PG between two multilayers of CdA showed gradual and progressive change with annealing at both temperatures for annealing times of up to several hours. This change is surprising as PG is expected to act as a barrier to interdiffusion of the CdA molecules at these temperatures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 248: Symposium O – Complex Fluids , 1991 , 41
Copyright
Copyright © Materials Research Society 1992

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References

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