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Papers Presented at the 12th China Academic Conference on Printing and Packaging 2021
Volume: 66 | Article ID: 020409
Green Preparation of Carbon Dots from Lycium Ruthenicum for Anti-counterfeiting
  DOI :  10.2352/J.ImagingSci.Technol.2022.66.2.020409  Published OnlineMarch 2022

Carbon dots (CDs) with excellent fluorescent performance are a potential material to restrain fakes, but the complex processes, high cost, and toxicity impede their application. Here, Lycium ruthenicum is employed as the carbon source, and eco-friendly CDs are obtained via a one-step hydrothermal method. The reaction conditions such as dosage, temperature, and time are optimized to achieve high yield, and the morphology, surface functional groups, and optical properties are characterized by scientific instruments. The results show that the spherical CDs with a diameter of 1.83 ± 0.30 nm have excellent solubility and a strong absorption peak at 285 nm. Subsequently, CDs were made into fluorescent inks; an ink-jet printer and a fountain pen are selected to examine the anti-counterfeit effect. Notably, the encrypted patterns can be hidden and perceived easily under natural light and UV light. Hence, these prepared CDs are expected to be an alternative material to be applied in the security field.

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Ting Guo, Xinyi Jiang, Xiaolin Hu, Xinyu Sun, Liangzhe Chen, Xinghai Liu, "Green Preparation of Carbon Dots from Lycium Ruthenicum for Anti-counterfeitingin Journal of Imaging Science and Technology,  2022,  pp 020409-1 - 020409-5,

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Copyright © Society for Imaging Science and Technology 2022
  Article timeline 
  • received June 2021
  • accepted September 2021
  • PublishedMarch 2022

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