Effect of the Molecular Weight of AB Diblock Copolymers on the Lamellar Orientation in Thin Films

Theory and Experiment

Igor I. Potemkin, Peter Busch, Detlef-M Smilgies, Dorthe Posselt, Christine M. Papadakis

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

We propose a theoretical explanation of the parallel and perpendicular lamellar orientations in free surface films of symmetric polystyrene-block-polybutadiene diblock copolymers on silicon substrates (with a native SiOx layer). Two approaches are developed: A correction to the strong segregation theory and a qualitative analysis of the intermediate segregation regime. We show that the perpendicular orientation of the lamellae formed by the molecules of high molecular weight is stabilized by A-B interfacial interactions. They are weaker in the case of the perpendicular orientation of the lamellae, whereas the surface tension coefficient of the A-B interface decreases with the increase of the molecular weight.
OriginalsprogEngelsk
TidsskriftMacromolecular Rapid Communications
Vol/bind28
Udgave nummer5
Sider (fra-til)579-584
Antal sider6
ISSN1022-1336
DOI
StatusUdgivet - 2007

Citer dette

Potemkin, Igor I. ; Busch, Peter ; Smilgies, Detlef-M ; Posselt, Dorthe ; Papadakis, Christine M. / Effect of the Molecular Weight of AB Diblock Copolymers on the Lamellar Orientation in Thin Films : Theory and Experiment. I: Macromolecular Rapid Communications. 2007 ; Bind 28, Nr. 5. s. 579-584.
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Effect of the Molecular Weight of AB Diblock Copolymers on the Lamellar Orientation in Thin Films : Theory and Experiment. / Potemkin, Igor I.; Busch, Peter; Smilgies, Detlef-M; Posselt, Dorthe; Papadakis, Christine M.

I: Macromolecular Rapid Communications, Bind 28, Nr. 5, 2007, s. 579-584.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Effect of the Molecular Weight of AB Diblock Copolymers on the Lamellar Orientation in Thin Films

T2 - Theory and Experiment

AU - Potemkin, Igor I.

AU - Busch, Peter

AU - Smilgies, Detlef-M

AU - Posselt, Dorthe

AU - Papadakis, Christine M.

PY - 2007

Y1 - 2007

N2 - We propose a theoretical explanation of the parallel and perpendicular lamellar orientations in free surface films of symmetric polystyrene-block-polybutadiene diblock copolymers on silicon substrates (with a native SiOx layer). Two approaches are developed: A correction to the strong segregation theory and a qualitative analysis of the intermediate segregation regime. We show that the perpendicular orientation of the lamellae formed by the molecules of high molecular weight is stabilized by A-B interfacial interactions. They are weaker in the case of the perpendicular orientation of the lamellae, whereas the surface tension coefficient of the A-B interface decreases with the increase of the molecular weight.

AB - We propose a theoretical explanation of the parallel and perpendicular lamellar orientations in free surface films of symmetric polystyrene-block-polybutadiene diblock copolymers on silicon substrates (with a native SiOx layer). Two approaches are developed: A correction to the strong segregation theory and a qualitative analysis of the intermediate segregation regime. We show that the perpendicular orientation of the lamellae formed by the molecules of high molecular weight is stabilized by A-B interfacial interactions. They are weaker in the case of the perpendicular orientation of the lamellae, whereas the surface tension coefficient of the A-B interface decreases with the increase of the molecular weight.

KW - block copolymers

KW - films

KW - grazing-incidence small-angle X-ray scattering (GISAXS)

KW - microstructure

KW - theory

U2 - 10.1002/marc.200600764

DO - 10.1002/marc.200600764

M3 - Journal article

VL - 28

SP - 579

EP - 584

JO - Macromolecular Rapid Communications

JF - Macromolecular Rapid Communications

SN - 1022-1336

IS - 5

ER -