Charge-Transfer-Induced Self-Assembly of Doped Conjugated Block Copolymer Nanofibers

Karnati Narasimha, Shine K. Albert, Jongwook Kim, Hyojung Kang, Sungsu Kang, Jungwon Park, Jae Hong Park, So Jung Park

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Here, we report charge-transfer-driven self-assembly of conjugated block copolymers (BCP) into highly doped conjugated polymer nanofibers. The ground-state integer charge transfer (ICT) between a BCP composed of poly(3-hexylthiophene) and poly(ethylene oxide) (P3HT-b-PEO) and electron-deficient 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) induced spontaneous self-assembly of the donor and the acceptor into well-defined one-dimensional nanofibers. The presence of the PEO block plays an important role for the self-assembly by providing a polar environment that can stabilize nanoscale charge transfer (CT) assemblies. The doped nanofibers were responsive to various external stimuli such as heat, chemical, and light and exhibited efficient photothermal properties in the near-IR region. The CT-driven BCP self-assembly reported here provides a new platform for the fabrication of highly doped semiconductor nanostructures.

Original languageEnglish
Pages (from-to)382-388
Number of pages7
JournalACS Macro Letters
Volume12
Issue number3
DOIs
StatePublished - 21 Mar 2023

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© 2023 American Chemical Society.

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