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Download Hi-Res ImageDownload to MS-PowerPointCite This:Nano Lett. 2024, 24, 24, 7474-7482
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    Nanostructured Molecular Packing of Polymer Films Formed on Water Surfaces
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    • Yoori Sung
      Yoori Sung
      School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
      More by Yoori Sung
    • Wonseok Lee
      Wonseok Lee
      Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
      More by Wonseok Lee
      Orcidhttps://orcid.org/0000-0001-9624-3717
    • Haechang Lee
      Haechang Lee
      School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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    • Jin-Woo Lee
      Jin-Woo Lee
      Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
      More by Jin-Woo Lee
    • Bumjoon J. Kim
      Bumjoon J. Kim
      Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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    • Seunghyup Yoo
      Seunghyup Yoo
      School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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      Orcidhttps://orcid.org/0000-0003-1887-6118
    • Seonju Jeong*
      Seonju Jeong
      School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
      *Seonju Jeong Email: [email protected]
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    • Jihan Kim*
      Jihan Kim
      Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
      *Jihan Kim Email: [email protected]
      More by Jihan Kim
      Orcidhttps://orcid.org/0000-0002-3844-8789
    • Jung-Yong Lee*
      Jung-Yong Lee
      School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
      *Jung-Yong Lee Email: [email protected]
      More by Jung-Yong Lee
      Orcidhttps://orcid.org/0000-0002-5347-8230
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    Nano Letters

    Cite this: Nano Lett. 2024, 24, 24, 7474–7482
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    https://doi.org/10.1021/acs.nanolett.4c01675
    Published June 10, 2024
    Copyright © 2024 American Chemical Society
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    Abstract

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    In this study, we examined the nanostructured molecular packing and orientations of poly[[N,N′-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′-bithiophene)] (P(NDI2OD-T2)) films formed on water for the application of nanotechnology-based organic electronic devices. First, the nanoscale molecule–substrate interaction between the polymer and water was modulated by controlling the alkyl side chain length in NDI-based copolymers. Increasing alkyl side chain lengths induced a nanomorphological transition from face-on to edge-on orientation, confirmed by molecular dynamics simulations revealing nanostructural behavior. Second, the nanoscale intermolecular interactions of P(NDI2OD-T2) were controlled by varying the volume ratio of the high-boiling-point additive solvent in the binary solvent blends. As the additive solvent ratio increased, the nanostructured molecular orientation of the P(NDI2OD-T2) films on water changed remarkably from edge-on to bimodal with more face-on crystallites, thereby affecting charge transport. Our finding provides essential insights for precise nanoscale morphological control on water substrates, enabling the formation of high-performance polymer films for organic electronic devices.

    Copyright © 2024 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.nanolett.4c01675.

    • Materials and preparation of polymer solutions; Spontaneous spreading (SS) process; Solubility effect; GIWAXS analysis of SC and SS films and Molecular dynamics (MD) simulations for three NDI copolymers; measurement of solvent evaporation time for SS film formation; Absorption spectra of P(NDI2OD-T2) SS films formed with various volume ratios of DCB; Surface morphology and NEXAFS analysis of P(NDI2OD-T2) SS films formed with various solvent blends, and output characteristics of SS processed P(NDI2OD-T2) OFETs (PDF)

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    Cited By

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    This article is cited by 1 publications.

    1. Mingdi Jiang, Junwhee Yang, Liang Liu, Aritra Nath Chattopadhyay, Vincent M. Rotello. Rapid Identification of Cell Types and Phenotypic States Using a One-Polymer Multichannel Nanosensor Fabricated via Flash Nanoprecipitation. ACS Applied Materials & Interfaces 2024, 16 (50) , 68928-68935. https://doi.org/10.1021/acsami.4c15474
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    Nano Letters

    Cite this: Nano Lett. 2024, 24, 24, 7474–7482
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.nanolett.4c01675
    Published June 10, 2024
    Copyright © 2024 American Chemical Society
    Request reuse permissions

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