Scholarlink

<p>Three kinds of N-doped carbon dots (CDs) were synthesized via the solvothermal method using orange juice, lemon juice, and banana leaves as biomass precursors. These CDs exhibited different fluorescence of blue, green, and red with the fluorescence quantum yield (FLQYs) of 16.2%, 14.5%, and 8.4%, respectively. The structure and composition analysis showed that B-CDs and G-CDs were nitrogen doped by urea with the content of about 4%, improving the fluorescence intensity significantly. Notably, the FL of R-CDs were composed of a blue FL emission and a red FL emission, which were inferred to be related to the CDs and chlorophyll-derived porphyrin. Three corresponding CD-based fluorescent inks were prepared by mixing with the thickening agent of glycerol. The application on handwriting, screen printing, and official seal indicated the multilevel UV/visible light dual-mode encryption potential. Furthermore, flexible sensing films were fabricated by incorporating CDs into polyvinyl alcohol (PVA) matrices. Remarkably, the CD-embedded films exhibited significantly enhanced electrical signal responses during mechanical sensing. This work not only provides a novel strategy for high-value utilization of biomass resources but also opens innovative pathways for developing intelligent anti-counterfeiting materials and flexible electronic devices.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Advanced security printing enabled by biomass-derived multicolor anti-counterfeiting fluorescent carbon dot ink with multimodal applications

  • 期刊论文

  • 发表日期：

    2025年7月18日

查看全文
  • Tingting Cai,
  • Yifan Zhao,
  • Tingyu Zhang,
  • Yun Yang

摘要

Three kinds of N-doped carbon dots (CDs) were synthesized via the solvothermal method using orange juice, lemon juice, and banana leaves as biomass precursors. These CDs exhibited different fluorescence of blue, green, and red with the fluorescence quantum yield (FLQYs) of 16.2%, 14.5%, and 8.4%, respectively. The structure and composition analysis showed that B-CDs and G-CDs were nitrogen doped by urea with the content of about 4%, improving the fluorescence intensity significantly. Notably, the FL of R-CDs were composed of a blue FL emission and a red FL emission, which were inferred to be related to the CDs and chlorophyll-derived porphyrin. Three corresponding CD-based fluorescent inks were prepared by mixing with the thickening agent of glycerol. The application on handwriting, screen printing, and official seal indicated the multilevel UV/visible light dual-mode encryption potential. Furthermore, flexible sensing films were fabricated by incorporating CDs into polyvinyl alcohol (PVA) matrices. Remarkably, the CD-embedded films exhibited significantly enhanced electrical signal responses during mechanical sensing. This work not only provides a novel strategy for high-value utilization of biomass resources but also opens innovative pathways for developing intelligent anti-counterfeiting materials and flexible electronic devices.

Graphical Abstract