The effect of heat treatment on the internal structure of nanostructured block copolymer films

Alessandro Sepe, E T Hoppe, S Jaksch, D Magerl, Q Zhong, Jan Perlich, Dorthe Posselt, Detlef-M. Smilgies, Christine M. Papadakis

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We report on the temperature dependence of the nanostructure of thin block copolymer films, as
studied using in situ grazing-incidence small-angle x-ray scattering (GISAXS). We focus on
spin-coated poly(styrene-b-butadiene) diblock copolymer thin films featuring lamellae
perpendicular to the substrate. In situ GISAXS measurements elucidate the structural changes
during heat treatment at temperatures between 60 and 130 ◦C. Thermal treatment below 100 ◦C
does not destroy the perpendicular lamellar order. In contrast, treatment between 105 and
120 ◦C leads to a broad distribution of lamellar orientations which only partially recovers upon
subsequent cooling. Treatment at 130 ◦C leads to severe changes of the film structure. We
attribute the change of behavior at 100 ◦C to the onset of the glass transition of the polystyrene
block and the related increase of long-range mobility. Our results indicate that the perpendicular
lamellar orientation for high molar mass samples is not stable under all conditions.
Original languageEnglish
JournalJournal of Physics: Condensed Matter
Volume23
Pages (from-to)254213
Number of pages9
ISSN0953-8984
DOIs
Publication statusPublished - 2011

Cite this

Sepe, Alessandro ; Hoppe, E T ; Jaksch, S ; Magerl, D ; Zhong, Q ; Perlich, Jan ; Posselt, Dorthe ; Smilgies, Detlef-M. ; Papadakis, Christine M. . / The effect of heat treatment on the internal structure of nanostructured block copolymer films. In: Journal of Physics: Condensed Matter. 2011 ; Vol. 23. pp. 254213.
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title = "The effect of heat treatment on the internal structure of nanostructured block copolymer films",
abstract = "We report on the temperature dependence of the nanostructure of thin block copolymer films, as studied using in situ grazing-incidence small-angle x-ray scattering (GISAXS). We focus on spin-coated poly(styrene-b-butadiene) diblock copolymer thin films featuring lamellae perpendicular to the substrate. In situ GISAXS measurements elucidate the structural changes during heat treatment at temperatures between 60 and 130 ◦C. Thermal treatment below 100 ◦C does not destroy the perpendicular lamellar order. In contrast, treatment between 105 and 120 ◦C leads to a broad distribution of lamellar orientations which only partially recovers upon subsequent cooling. Treatment at 130 ◦C leads to severe changes of the film structure. We attribute the change of behavior at 100 ◦C to the onset of the glass transition of the polystyrene block and the related increase of long-range mobility. Our results indicate that the perpendicular lamellar orientation for high molar mass samples is not stable under all conditions.",
author = "Alessandro Sepe and Hoppe, {E T} and S Jaksch and D Magerl and Q Zhong and Jan Perlich and Dorthe Posselt and Detlef-M. Smilgies and Papadakis, {Christine M.}",
year = "2011",
doi = "10.1088/0953-8984/23/25/254213",
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volume = "23",
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journal = "Journal of Physics: Condensed Matter",
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Sepe, A, Hoppe, ET, Jaksch, S, Magerl, D, Zhong, Q, Perlich, J, Posselt, D, Smilgies, D-M & Papadakis, CM 2011, 'The effect of heat treatment on the internal structure of nanostructured block copolymer films', Journal of Physics: Condensed Matter, vol. 23, pp. 254213. https://doi.org/10.1088/0953-8984/23/25/254213

The effect of heat treatment on the internal structure of nanostructured block copolymer films. / Sepe, Alessandro; Hoppe, E T ; Jaksch, S; Magerl, D; Zhong, Q; Perlich, Jan; Posselt, Dorthe; Smilgies, Detlef-M.; Papadakis, Christine M. .

In: Journal of Physics: Condensed Matter, Vol. 23, 2011, p. 254213.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - The effect of heat treatment on the internal structure of nanostructured block copolymer films

AU - Sepe, Alessandro

AU - Hoppe, E T

AU - Jaksch, S

AU - Magerl, D

AU - Zhong, Q

AU - Perlich, Jan

AU - Posselt, Dorthe

AU - Smilgies, Detlef-M.

AU - Papadakis, Christine M.

PY - 2011

Y1 - 2011

N2 - We report on the temperature dependence of the nanostructure of thin block copolymer films, as studied using in situ grazing-incidence small-angle x-ray scattering (GISAXS). We focus on spin-coated poly(styrene-b-butadiene) diblock copolymer thin films featuring lamellae perpendicular to the substrate. In situ GISAXS measurements elucidate the structural changes during heat treatment at temperatures between 60 and 130 ◦C. Thermal treatment below 100 ◦C does not destroy the perpendicular lamellar order. In contrast, treatment between 105 and 120 ◦C leads to a broad distribution of lamellar orientations which only partially recovers upon subsequent cooling. Treatment at 130 ◦C leads to severe changes of the film structure. We attribute the change of behavior at 100 ◦C to the onset of the glass transition of the polystyrene block and the related increase of long-range mobility. Our results indicate that the perpendicular lamellar orientation for high molar mass samples is not stable under all conditions.

AB - We report on the temperature dependence of the nanostructure of thin block copolymer films, as studied using in situ grazing-incidence small-angle x-ray scattering (GISAXS). We focus on spin-coated poly(styrene-b-butadiene) diblock copolymer thin films featuring lamellae perpendicular to the substrate. In situ GISAXS measurements elucidate the structural changes during heat treatment at temperatures between 60 and 130 ◦C. Thermal treatment below 100 ◦C does not destroy the perpendicular lamellar order. In contrast, treatment between 105 and 120 ◦C leads to a broad distribution of lamellar orientations which only partially recovers upon subsequent cooling. Treatment at 130 ◦C leads to severe changes of the film structure. We attribute the change of behavior at 100 ◦C to the onset of the glass transition of the polystyrene block and the related increase of long-range mobility. Our results indicate that the perpendicular lamellar orientation for high molar mass samples is not stable under all conditions.

U2 - 10.1088/0953-8984/23/25/254213

DO - 10.1088/0953-8984/23/25/254213

M3 - Journal article

VL - 23

SP - 254213

JO - Journal of Physics: Condensed Matter

JF - Journal of Physics: Condensed Matter

SN - 0953-8984

ER -