Parallel and perpendicular lamellar phases in copolymer–nanoparticle multilayer structures

Recent results in developing novel nanocomposite multilayer structures are presented. We used symmetric polystryrene–block–polymethylmethacrylate (deuterated) P(S–b–MMAd) lamellar thin films as a self-assembling matrix for the lamellar arrangement of Fe 3O 4 nanoparticles. Pure copolymer films showe...

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Bibliographic Details
Published inPhysica. B, Condensed matter Vol. 350; no. 1; pp. E939 - E942
Main Authors Lauter-Pasyuk, V, Lauter, H, Gordeev, G, Müller-Buschbaum, P, Toperverg, B.P, Petry, W, Jernenkov, M, Petrenko, A, Aksenov, V
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.07.2004
Subjects
Block copolymers films
Composite films
Nanoparticles
Neutron off-specular scattering
Neutron reflectometry
Nanoparticles
82.35.Lr
Neutron reflectometry
81.16.Dn
82.35.Np
Block copolymers films
82.35.Jk
Neutron off-specular scattering
61.12.Ha
83.20.Uv
Composite films
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Summary:Recent results in developing novel nanocomposite multilayer structures are presented. We used symmetric polystryrene–block–polymethylmethacrylate (deuterated) P(S–b–MMAd) lamellar thin films as a self-assembling matrix for the lamellar arrangement of Fe 3O 4 nanoparticles. Pure copolymer films showed an unusual structure with a perpendicular to the surface orientation of the lamellae, in the part of the film towards the free surface. This is a new phenomenon because up to now this orientation was obtained only on specially prepared substrates. After the incorporation of nanoparticles into the copolymer matrix, the system switched to a lamellar structure parallel to the surface. Further increasing of the nanoparticles concentration led to a more perfect lamellar structure, which shows that the limit for a high concentration of nanoparticles, important for nanotechnology has not yet been reached.
ISSN:0921-4526
DOI:10.1016/j.physb.2004.03.265