Order-disorder transitions in block copolymer thin films studied by guided wave depolarized light scattering with grating couplers

Jeffrey D. Wilbur; Zhuangxi Fang; Bruce A. Garetz; Maurice C. Newstein; Nitash P. Balsara

doi:10.1021/ma702587u

Order-disorder transitions in block copolymer thin films studied by guided wave depolarized light scattering with grating couplers

Jeffrey D. Wilbur, Zhuangxi Fang, Bruce A. Garetz, Maurice C. Newstein, Nitash P. Balsara

Chemical and Biomolecular Engineering

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

Abstract

We demonstrate the use of guided wave depolarized light scattering (GWDLS) with diffraction gratings for studying the properties of soft block copolymer films in the vicinity of order-disorder transitions. The order-disorder transition temperature (T_ODT) of 500 nm thick poly(α- methylstyrene-block-isoprene) films is determined by this technique. Atomic force microscopy on quenched samples is used to verify our conclusion. Disordering and ordering dynamics of these films were examined in real time as the films were heated and cooled across the T_ODT. Our work opens the door for using depolarized light scattering for locating transitions between optically isotropic and optically anisotropic block copolymer phases in thin films.

Original language	English (US)
Pages (from-to)	4464-4470
Number of pages	7
Journal	Macromolecules
Volume	41
Issue number	12
DOIs	https://doi.org/10.1021/ma702587u
State	Published - Jun 24 2008

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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abstract = "We demonstrate the use of guided wave depolarized light scattering (GWDLS) with diffraction gratings for studying the properties of soft block copolymer films in the vicinity of order-disorder transitions. The order-disorder transition temperature (TODT) of 500 nm thick poly(α- methylstyrene-block-isoprene) films is determined by this technique. Atomic force microscopy on quenched samples is used to verify our conclusion. Disordering and ordering dynamics of these films were examined in real time as the films were heated and cooled across the TODT. Our work opens the door for using depolarized light scattering for locating transitions between optically isotropic and optically anisotropic block copolymer phases in thin films.",

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T1 - Order-disorder transitions in block copolymer thin films studied by guided wave depolarized light scattering with grating couplers

AU - Wilbur, Jeffrey D.

AU - Fang, Zhuangxi

AU - Garetz, Bruce A.

AU - Newstein, Maurice C.

AU - Balsara, Nitash P.

PY - 2008/6/24

Y1 - 2008/6/24

N2 - We demonstrate the use of guided wave depolarized light scattering (GWDLS) with diffraction gratings for studying the properties of soft block copolymer films in the vicinity of order-disorder transitions. The order-disorder transition temperature (TODT) of 500 nm thick poly(α- methylstyrene-block-isoprene) films is determined by this technique. Atomic force microscopy on quenched samples is used to verify our conclusion. Disordering and ordering dynamics of these films were examined in real time as the films were heated and cooled across the TODT. Our work opens the door for using depolarized light scattering for locating transitions between optically isotropic and optically anisotropic block copolymer phases in thin films.

AB - We demonstrate the use of guided wave depolarized light scattering (GWDLS) with diffraction gratings for studying the properties of soft block copolymer films in the vicinity of order-disorder transitions. The order-disorder transition temperature (TODT) of 500 nm thick poly(α- methylstyrene-block-isoprene) films is determined by this technique. Atomic force microscopy on quenched samples is used to verify our conclusion. Disordering and ordering dynamics of these films were examined in real time as the films were heated and cooled across the TODT. Our work opens the door for using depolarized light scattering for locating transitions between optically isotropic and optically anisotropic block copolymer phases in thin films.

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Order-disorder transitions in block copolymer thin films studied by guided wave depolarized light scattering with grating couplers

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