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<p>The conventional top-down approach used for the fabrication of transparent wood composites comes with certain issues including the use of excess chemicals, limited patternability of the optical properties, and requirement of natural trees as the raw material. Here, we propose a novel bottom-up approach where we start with cellulose nanocrystals, which can be obtained either from trees or other eco-friendly resources such as grass, and bacterial cellulose. Our 3D printed cellulosic aerogels have a microstructure similar as the delignified wood used in the conventional fabrication process and demonstrate a high optical transparency (87%). Furthermore, incorporating 3D printing enables precise patterning of the material so that we can achieve patterned optical transparency. We further functionalized our ink using nitrogen doped graphene quantum dots and fabricated multifunctional composites with patterned UV illumination properties with an ability to precisely measure the temperature. Our approach is a promising method for cost-efficient fabrication of optical devices for applications such as gradient refractive index lenses, smart windows, and screens.</p>

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3D printed multifunctional transparent composites of cellulose nanocrystal and graphene quantum dot aerogels

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Halil Tetik,
  • Darwin Kurniawan,
  • Guang Yang,
  • Yisheng Sun,
  • Licong An,
  • Mahya Rahbar,
  • Gary J. Cheng,
  • Caixia Wan,
  • Xinwei Wang,
  • Wei-Hung Chiang,
  • Dong Lin

摘要

The conventional top-down approach used for the fabrication of transparent wood composites comes with certain issues including the use of excess chemicals, limited patternability of the optical properties, and requirement of natural trees as the raw material. Here, we propose a novel bottom-up approach where we start with cellulose nanocrystals, which can be obtained either from trees or other eco-friendly resources such as grass, and bacterial cellulose. Our 3D printed cellulosic aerogels have a microstructure similar as the delignified wood used in the conventional fabrication process and demonstrate a high optical transparency (87%). Furthermore, incorporating 3D printing enables precise patterning of the material so that we can achieve patterned optical transparency. We further functionalized our ink using nitrogen doped graphene quantum dots and fabricated multifunctional composites with patterned UV illumination properties with an ability to precisely measure the temperature. Our approach is a promising method for cost-efficient fabrication of optical devices for applications such as gradient refractive index lenses, smart windows, and screens.