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Wood-based superblack

Author

Listed:
  • Bin Zhao

    (Aalto University)

  • Xuetong Shi

    (The University of British Columbia)

  • Sergei Khakalo

    (School of Engineering, Aalto University
    VTT Technical Research Centre of Finland Ltd)

  • Yang Meng

    (Kunming University of Science and Technology)

  • Arttu Miettinen

    (University of Jyvaskyla)

  • Tuomas Turpeinen

    (VTT Technical Research Centre of Finland Ltd)

  • Shuyi Mi

    (Aalto University)

  • Zhipei Sun

    (Aalto University
    Aalto University)

  • Alexey Khakalo

    (VTT Technical Research Centre of Finland Ltd)

  • Orlando J. Rojas

    (Aalto University
    The University of British Columbia)

  • Bruno D. Mattos

    (Aalto University)

Abstract

Light is a powerful and sustainable resource, but it can be detrimental to the performance and longevity of optical devices. Materials with near-zero light reflectance, i.e. superblack materials, are sought to improve the performance of several light-centered technologies. Here we report a simple top-down strategy, guided by computational methods, to develop robust superblack materials following metal-free wood delignification and carbonization (1500 °C). Subwavelength severed cells evolve under shrinkage stresses, yielding vertically aligned carbon microfiber arrays with a thickness of ~100 µm and light reflectance as low as 0.36% and independent of the incidence angle. The formation of such structures is rationalized based on delignification method, lignin content, carbonization temperature and wood density. Moreover, our measurements indicate a laser beam reflectivity lower than commercial light stoppers in current use. Overall, the wood-based superblack material is introduced as a mechanically robust surrogate for microfabricated carbon nanotube arrays.

Suggested Citation

  • Bin Zhao & Xuetong Shi & Sergei Khakalo & Yang Meng & Arttu Miettinen & Tuomas Turpeinen & Shuyi Mi & Zhipei Sun & Alexey Khakalo & Orlando J. Rojas & Bruno D. Mattos, 2023. "Wood-based superblack," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43594-4
    DOI: 10.1038/s41467-023-43594-4
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    References listed on IDEAS

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    1. Dakota E. McCoy & Teresa Feo & Todd Alan Harvey & Richard O. Prum, 2018. "Structural absorption by barbule microstructures of super black bird of paradise feathers," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
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