Liu Xiao-Fei, Zou Liang, Yang Chen, Zhao Weili, Li Xiang-Yang, Sun Bing, Hu Chen-Xia, Yu Yue, Wang Qiang, Zhao Qiang, Zhang Hao-Li
State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications(NUPT), Nanjing 210023, P. R. China.
ACS Appl Mater Interfaces. 2020 Sep 23;12(38):43073-43082. doi: 10.1021/acsami.0c10869. Epub 2020 Sep 9.
Using temporal dimension in optical multiplexing is a promising method to increase the security of data encryption. However, adjusting the fluorescence lifetime of light-emitting material often results in inevitable changes in their fluorescence spectra, which is unfavorable for confidential information protection. Here, we report the preparation of various perovskite quantum dot/polymer nanospheres (PQD/polymer) with tunable and long fluorescence lifetimes but identical fluorescence spectra, which are ideal multidimensional data encryption materials. This new data encryption strategy utilizes the water sensitivity of perovskite and achieves spatial dimension encryption of information using different water stabilities between uncoated perovskite quantum dots and PQD/polymer. The fluorescence lifetime of PQD/polymer is used as the coding element to achieve temporal dimension data encryption, and the data are decrypted by fluorescence lifetime imaging microscopy and time-gated luminescence imaging techniques. This study shows the potential of PQD/polymer as a new class of materials for advanced data encryption.
在光复用中使用时间维度是提高数据加密安全性的一种很有前景的方法。然而，调节发光材料的荧光寿命往往会导致其荧光光谱不可避免地发生变化，这不利于机密信息保护。在此，我们报道了制备出各种具有可调谐且长荧光寿命但荧光光谱相同的钙钛矿量子点/聚合物纳米球（PQD/聚合物），它们是理想的多维数据加密材料。这种新的数据加密策略利用了钙钛矿的水敏感性，并利用未包覆的钙钛矿量子点与PQD/聚合物之间不同的水稳定性实现信息的空间维度加密。将PQD/聚合物的荧光寿命用作编码元素以实现时间维度数据加密，并通过荧光寿命成像显微镜和时间门控发光成像技术对数据进行解密。这项研究展示了PQD/聚合物作为一类新型先进数据加密材料的潜力。
