Man Zaiqin, Dong Chenyu, Bian Jie, Lu Zhenda, Lu Yan-Qing, Zhang Weihua
College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, and MOE Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing, Jiangsu 210023, PR China.
State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing, Jiangsu 210023, PR China.
Nano Lett. 2024 Jun 12;24(23):7019-7024. doi: 10.1021/acs.nanolett.4c01463. Epub 2024 May 29.
We present a secure and user-friendly ultraminiaturized anticounterfeiting labeling technique─the color-encoded physical unclonable nanotag. These nanotags consist of subwavelength spots formed by random combinations of multicolor quantum dots, which are fabricated using a cost-efficient printing method developed in this study. The nanotags support over 170,000 different colors and are inherently resistant to cloning. Moreover, their high brightness and color purity, owing to the quantum dots, ensure an ease of readability. Additionally, these nanotags can function as color-encrypted pixels, enabling the incorporation of labels (such as QR codes) into ultrasmall physically unclonable hidden tags with a resolution exceeding 100,000 DPI. The unique blend of compactness, flexibility, and security positions the color-encoded nanotag as a potent and versatile solution for next-generation anticounterfeiting applications.
我们展示了一种安全且用户友好的超小型防伪标记技术——颜色编码物理不可克隆纳米标签。这些纳米标签由多色量子点随机组合形成的亚波长斑点组成，采用本研究开发的经济高效的印刷方法制造。这些纳米标签支持超过170,000种不同颜色，并且天生抗克隆。此外，由于量子点，它们具有高亮度和高色纯度，确保了易读性。此外，这些纳米标签可以用作颜色加密像素，能够将标签（如二维码）整合到超小的物理不可克隆隐藏标签中，分辨率超过100,000 DPI。紧凑性、灵活性和安全性的独特结合使颜色编码纳米标签成为下一代防伪应用的强大且通用的解决方案。
