Crystallization in diblock copolymer thin films at different degrees of supercooling

Charles Darko; I. Botiz; G. Reiter; D. W. Breiby; J. W. Andreasen; S. V. Roth; D. -M. Smilgies; E. Metwalli; C. M. Papadakis

Crystallization in diblock copolymer thin films at different degrees of supercooling

Charles Darko, I. Botiz, G. Reiter, D. W. Breiby, J. W. Andreasen, S. V. Roth, D. -M. Smilgies, E. Metwalli, C. M. Papadakis

Research output: Contribution to journal › Article › peer-review

Abstract

The crystalline structures in thin films of polystyrene-b-poly(ethylene oxide) (PS-b-PEO) diblock copolymers were studied in dependence on the degree of supercooling. Atomic force microscopy showed that the crystalline domains (lamellae) consist of grains, which are macroscopic at low and intermediate degrees of supercooling, but of submicrometer size for strong supercooling. Using grazing-incidence wide-angle x-ray scattering, we could determine the grain orientation distribution function which shows that the chain stems are perpendicular to the lamellae at low supercooling, but tilted at intermediate and strong supercooling. These results suggest that, at intermediate and strong supercooling, the crystalline PEO lamellae do not grow homogeneously, but by the formation of small crystallites at the growth front.

Original language	English
Pages (from-to)	041802-1 - 041802-5
Number of pages	5
Journal	Physical review. E, Statistical, nonlinear, and soft matter physic
Volume	79
Issue number	4
Publication status	Published - 2009

Cite this

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title = "Crystallization in diblock copolymer thin films at different degrees of supercooling",

abstract = "The crystalline structures in thin films of polystyrene-b-poly(ethylene oxide) (PS-b-PEO) diblock copolymers were studied in dependence on the degree of supercooling. Atomic force microscopy showed that the crystalline domains (lamellae) consist of grains, which are macroscopic at low and intermediate degrees of supercooling, but of submicrometer size for strong supercooling. Using grazing-incidence wide-angle x-ray scattering, we could determine the grain orientation distribution function which shows that the chain stems are perpendicular to the lamellae at low supercooling, but tilted at intermediate and strong supercooling. These results suggest that, at intermediate and strong supercooling, the crystalline PEO lamellae do not grow homogeneously, but by the formation of small crystallites at the growth front.",

author = "Charles Darko and I. Botiz and G. Reiter and Breiby, {D. W.} and Andreasen, {J. W.} and Roth, {S. V.} and Smilgies, {D. -M.} and E. Metwalli and Papadakis, {C. M.}",

year = "2009",

language = "English",

volume = "79",

pages = "041802--1 -- 041802--5",

journal = "Physical review. E, Statistical, nonlinear, and soft matter physic",

issn = "1539-3755",

publisher = "American Physical Society",

number = "4",

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TY - JOUR

T1 - Crystallization in diblock copolymer thin films at different degrees of supercooling

AU - Darko, Charles

AU - Botiz, I.

AU - Reiter, G.

AU - Breiby, D. W.

AU - Andreasen, J. W.

AU - Roth, S. V.

AU - Smilgies, D. -M.

AU - Metwalli, E.

AU - Papadakis, C. M.

PY - 2009

Y1 - 2009

N2 - The crystalline structures in thin films of polystyrene-b-poly(ethylene oxide) (PS-b-PEO) diblock copolymers were studied in dependence on the degree of supercooling. Atomic force microscopy showed that the crystalline domains (lamellae) consist of grains, which are macroscopic at low and intermediate degrees of supercooling, but of submicrometer size for strong supercooling. Using grazing-incidence wide-angle x-ray scattering, we could determine the grain orientation distribution function which shows that the chain stems are perpendicular to the lamellae at low supercooling, but tilted at intermediate and strong supercooling. These results suggest that, at intermediate and strong supercooling, the crystalline PEO lamellae do not grow homogeneously, but by the formation of small crystallites at the growth front.

AB - The crystalline structures in thin films of polystyrene-b-poly(ethylene oxide) (PS-b-PEO) diblock copolymers were studied in dependence on the degree of supercooling. Atomic force microscopy showed that the crystalline domains (lamellae) consist of grains, which are macroscopic at low and intermediate degrees of supercooling, but of submicrometer size for strong supercooling. Using grazing-incidence wide-angle x-ray scattering, we could determine the grain orientation distribution function which shows that the chain stems are perpendicular to the lamellae at low supercooling, but tilted at intermediate and strong supercooling. These results suggest that, at intermediate and strong supercooling, the crystalline PEO lamellae do not grow homogeneously, but by the formation of small crystallites at the growth front.

M3 - Article

SN - 1539-3755

VL - 79

SP - 041802-1 - 041802-5

JO - Physical review. E, Statistical, nonlinear, and soft matter physic

JF - Physical review. E, Statistical, nonlinear, and soft matter physic

IS - 4

ER -

Crystallization in diblock copolymer thin films at different degrees of supercooling

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