The lamellar period in symmetric diblock copolymer thin films studied by neutron reflectivity and AFM

N. Gadegaard, K. Almdal, N.B. Larsen, K. Mortensen

    Research output: Contribution to journalJournal articleResearch

    Abstract

    The lamellar structure of a symmetric diblock copolymer was studied as a function of temperature. We used dPEP-PDMS with a molecular weight of 8.3 kg/mol as model system. The polymer was dissolved in chloroform and spin-casted on silicon wafers into thin uniform films. The degree and direction of lamellar ordering in the thin films was measured by small angle neutron scattering. Neutron reflectivity was used to measure the detailed lamellar structure in the thin films. For the temperature scans only the first order Bragg peak was measured to determine the lamellar period in the film. Our experimental results are compared to theoretical predictions on the scaling behavior of the lamella period as a function of temperature. The morphology of the surface was investigated by atomic force microscopy. Holes were found around defects in the films. The cross-section of the holes revealed the lamellar structure with a periodicity comparable to what was found by neutron reflectivity. (C) 1999 Elsevier Science B.V. All rights reserved.
    Original languageEnglish
    JournalApplied Surface Science
    Volume142
    Issue number1-4
    Pages (from-to)608-613
    ISSN0169-4332
    DOIs
    Publication statusPublished - 1999

    Cite this

    @article{537ed0e37fa747a4a674e2207c35f3ac,
    title = "The lamellar period in symmetric diblock copolymer thin films studied by neutron reflectivity and AFM",
    abstract = "The lamellar structure of a symmetric diblock copolymer was studied as a function of temperature. We used dPEP-PDMS with a molecular weight of 8.3 kg/mol as model system. The polymer was dissolved in chloroform and spin-casted on silicon wafers into thin uniform films. The degree and direction of lamellar ordering in the thin films was measured by small angle neutron scattering. Neutron reflectivity was used to measure the detailed lamellar structure in the thin films. For the temperature scans only the first order Bragg peak was measured to determine the lamellar period in the film. Our experimental results are compared to theoretical predictions on the scaling behavior of the lamella period as a function of temperature. The morphology of the surface was investigated by atomic force microscopy. Holes were found around defects in the films. The cross-section of the holes revealed the lamellar structure with a periodicity comparable to what was found by neutron reflectivity. (C) 1999 Elsevier Science B.V. All rights reserved.",
    keywords = "Nye funktionelle materialer",
    author = "N. Gadegaard and K. Almdal and N.B. Larsen and K. Mortensen",
    year = "1999",
    doi = "10.1016/S0169-4332(98)00697-7",
    language = "English",
    volume = "142",
    pages = "608--613",
    journal = "Applied Surface Science",
    issn = "0169-4332",
    publisher = "Elsevier",
    number = "1-4",

    }

    The lamellar period in symmetric diblock copolymer thin films studied by neutron reflectivity and AFM. / Gadegaard, N.; Almdal, K.; Larsen, N.B.; Mortensen, K.

    In: Applied Surface Science, Vol. 142, No. 1-4, 1999, p. 608-613.

    Research output: Contribution to journalJournal articleResearch

    TY - JOUR

    T1 - The lamellar period in symmetric diblock copolymer thin films studied by neutron reflectivity and AFM

    AU - Gadegaard, N.

    AU - Almdal, K.

    AU - Larsen, N.B.

    AU - Mortensen, K.

    PY - 1999

    Y1 - 1999

    N2 - The lamellar structure of a symmetric diblock copolymer was studied as a function of temperature. We used dPEP-PDMS with a molecular weight of 8.3 kg/mol as model system. The polymer was dissolved in chloroform and spin-casted on silicon wafers into thin uniform films. The degree and direction of lamellar ordering in the thin films was measured by small angle neutron scattering. Neutron reflectivity was used to measure the detailed lamellar structure in the thin films. For the temperature scans only the first order Bragg peak was measured to determine the lamellar period in the film. Our experimental results are compared to theoretical predictions on the scaling behavior of the lamella period as a function of temperature. The morphology of the surface was investigated by atomic force microscopy. Holes were found around defects in the films. The cross-section of the holes revealed the lamellar structure with a periodicity comparable to what was found by neutron reflectivity. (C) 1999 Elsevier Science B.V. All rights reserved.

    AB - The lamellar structure of a symmetric diblock copolymer was studied as a function of temperature. We used dPEP-PDMS with a molecular weight of 8.3 kg/mol as model system. The polymer was dissolved in chloroform and spin-casted on silicon wafers into thin uniform films. The degree and direction of lamellar ordering in the thin films was measured by small angle neutron scattering. Neutron reflectivity was used to measure the detailed lamellar structure in the thin films. For the temperature scans only the first order Bragg peak was measured to determine the lamellar period in the film. Our experimental results are compared to theoretical predictions on the scaling behavior of the lamella period as a function of temperature. The morphology of the surface was investigated by atomic force microscopy. Holes were found around defects in the films. The cross-section of the holes revealed the lamellar structure with a periodicity comparable to what was found by neutron reflectivity. (C) 1999 Elsevier Science B.V. All rights reserved.

    KW - Nye funktionelle materialer

    U2 - 10.1016/S0169-4332(98)00697-7

    DO - 10.1016/S0169-4332(98)00697-7

    M3 - Journal article

    VL - 142

    SP - 608

    EP - 613

    JO - Applied Surface Science

    JF - Applied Surface Science

    SN - 0169-4332

    IS - 1-4

    ER -