物理化学学报 >> 2026, Vol. 42 >> Issue (3): 100198.doi: 10.1016/j.actphy.2025.100198

所属专题： 碳点功能材料

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用于可扩展和高分辨率隐形印刷的磷光碳纳米点油墨

龙燕, 赵文博*(), 曹庆, 李翔宇, 李付奎, 胡宴伟, 宋世玉*(), 刘凯凯*()   

  1. 郑州大学, 物理学院, 教育部材料物理重点实验室, 河南省金刚石光电材料与器件重点实验室, 河南 郑州 450052
  • 收稿日期:2025-08-03 修回日期:2025-09-24 录用日期:2025-09-28 发布日期:2026-01-05
  • 通讯作者: Email: zwb2626@163.com (赵文博)sysong@zzu.edu.cn (宋世玉)liukaikai@zzu.edu.cn (刘凯凯)

Phosphorescent carbon nanodot inks for scalable and high-resolution invisible printing

Yan Long, Wenbo Zhao*(), Qing Cao, Xiangyu Li, Fukui Li, Yanwei Hu, Shiyu Song*(), Kaikai Liu*()   

  1. Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, School of Physics, Zhengzhou University, Zhengzhou 450052, Henan Province, China
  • Received:2025-08-03 Revised:2025-09-24 Accepted:2025-09-28 Published:2026-01-05
  • Contact: Email: zwb2626@163.com (Wenbo Zhao)sysong@zzu.edu.cn (Shiyu Song)liukaikai@zzu.edu.cn (Kaikai Liu)

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摘要：

基于碳纳米点(CNDs)的磷光油墨为持久可视化和延时信息读取提供了一种环保且低成本的解决方案。然而，当前依赖基质的磷光碳纳米点存在加工性能差和基底兼容性有限的问题，阻碍了其在可扩展、高分辨率隐形印刷中的应用。本文报道了一种可实现高分辨率、环境稳定且隐形印刷的水溶性磷光CNDs油墨。通过印刷过程中的空间限域效应，稳定CNDs中的三重态激子，从而产生明亮且长寿命的磷光。该磷光CNDs油墨能以微米级分辨率(2480 × 3508 dpi，约100 μm特征尺寸)实现复杂文本图案的隐形高保真印刷，在五类纸质基底上支持最小5 pt字号与0.05 pt的细线宽度。印刷图案在约870万像素中显示出超过98.7%的准确度，展现出卓越的保真性。基于优异的隐形印刷特性，研究团队成功制作了采用磷光CNDs油墨的200页无字书。这项工作为磷光油墨印刷提供了可扩展、低成本且高分辨率的平台，标志着隐形印刷技术的重大突破。

关键词: 碳纳米点, 磷光油墨, 隐形印刷, 高分辨率, 可扩展

Abstract:

Phosphorescent inks based on carbon nanodots (CNDs) offer an environmentally friendly and low-cost alternative for persistent visibility and time-delayed information retrieval. However, current matrix-dependent phosphorescent CNDs suffer from poor processability and limited substrate compatibility, hindering their application in scalable, high-resolution invisible printing. Here, we report water-soluble phosphorescent CND inks that enable high-resolution, environmentally stable, and invisible printing. The triplet excitons in CNDs are stabilized by spatial confinement during printing, resulting in bright and long-lived phosphorescence. The phosphorescent CND inks enable invisible yet high-fidelity printing of complex textual patterns with micrometer resolution (2480 × 3508 dpi, ~100 μm feature size), supporting font sizes down to 5 pt and line widths as thin as 0.05 pt across five types of paper substrates. The printed patterns exhibit over 98.7% accuracy across approximately 8.7 million pixels, demonstrating excellent fidelity. Based on these excellent invisible printing properties, a 200-page wordless book using phosphorescent CND inks was demonstrated. This work presents a scalable, low-cost, and high-resolution platform for phosphorescent ink printing, marking a significant advance in invisible printing technology.

Key words: Carbon nanodots, Phosphorescent inks, Invisible printing, High-resolution, Scalable