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Laser-induced graphitization of polydopamine leads to enhanced mechanical performance while preserving multifunctionality

Author

Listed:
  • Kyueui Lee

    (University of California at Berkeley)

  • Minok Park

    (University of California at Berkeley)

  • Katerina G. Malollari

    (University of California at Berkeley)

  • Jisoo Shin

    (University of California at Berkeley)

  • Sally M. Winkler

    (University of California at Berkeley)

  • Yuting Zheng

    (University of California at Berkeley)

  • Jung Hwan Park

    (Kumoh National Institute of Technology)

  • Costas P. Grigoropoulos

    (University of California at Berkeley)

  • Phillip B. Messersmith

    (University of California at Berkeley
    University of California at Berkeley
    Lawrence Berkeley National Laboratory)

Abstract

Polydopamine (PDA) is a simple and versatile conformal coating material that has been proposed for a variety of uses; however in practice its performance is often hindered by poor mechanical properties and high roughness. Here, we show that blue-diode laser annealing dramatically improves mechanical performance and reduces roughness of PDA coatings. Laser-annealed PDA (LAPDA) was shown to be >100-fold more scratch resistant than pristine PDA and even better than hard inorganic substrates, which we attribute to partial graphitization and covalent coupling between PDA subunits during annealing. Moreover, laser annealing provides these benefits while preserving other attractive properties of PDA, as demonstrated by the superior biofouling resistance of antifouling polymer-grafted LAPDA compared to PDA modified with the same polymer. Our work suggests that laser annealing may allow the use of PDA in mechanically demanding applications previously considered inaccessible, without sacrificing the functional versatility that is so characteristic of PDA.

Suggested Citation

  • Kyueui Lee & Minok Park & Katerina G. Malollari & Jisoo Shin & Sally M. Winkler & Yuting Zheng & Jung Hwan Park & Costas P. Grigoropoulos & Phillip B. Messersmith, 2020. "Laser-induced graphitization of polydopamine leads to enhanced mechanical performance while preserving multifunctionality," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18654-8
    DOI: 10.1038/s41467-020-18654-8
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    Cited by:

    1. Hamoon Hemmatpour & Oreste Luca & Dominic Crestani & Marc C. A. Stuart & Alessia Lasorsa & Patrick C. A. Wel & Katja Loos & Theodosis Giousis & Vahid Haddadi-Asl & Petra Rudolf, 2023. "New insights in polydopamine formation via surface adsorption," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    2. Haejin Jeong & Jisoo Lee & Seunghwi Kim & Haeram Moon & Seonki Hong, 2023. "Site-specific fabrication of a melanin-like pigment through spatially confined progressive assembly on an initiator-loaded template," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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