Novel strategy of multidimensional information encryption via multi-color carbon dots aggregation-induced emission  

作　　者：Liu Ding Xilang Jin Yuchong Gao Shouwang Kang Haiyan Bai Xuehao Ma Taotao Ai Hongwei Zhou Weixing Chen 

机构地区：[1]Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices Engineering Research Center of Light Stabilizers for Polymer Materials Universities of Shaanxi Province,School of Materials and Chemical Engineering,Xi’an Technological University,Xi’an 710021,China [2]School of Material Science and Engineering,Shaanxi University of Technology,Hanzhong 723000,China [3]Department of Materials Science and Engineering,University of Pennsylvania,Philadelphia 19104,USA

出　　处：《Nano Research》2024年第6期5680-5687,共8页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(No.21807085);the Natural Science Foundation Research Project of Shaanxi Province(No.2023-JCYB-087);the Technology Innovation Leading Program of Shaanxi(No.2020QFY07-05);the Innovation Capability Support Program of Shaanxi(No.2022KJXX-88);the fund of Education Department of Shaanxi Province(Program No.Z20230071).

摘　　要：Carbon dots(CDs)with aggregation-induced emission(AIE)have sparked significant interest in multidimensional anti-counterfeiting due to their exceptional fluorescence properties.However,the preparation of AIE CDs with multicolor solid-state fluorescence remains a formidable challenge due to its complicated construction.In the present work,a novel class of multicolor AIE CDs(M-CDs)were fabricated using selected precursor(salicylic acid,thiosalicylic acid,and 2,2'-dithiodibenzoic acid),with an eco-friendly,low-cost one-pot solvothermal method.In the dilute organic solution,M-CDs manifested blue emission,but upon aggregation in the presence of water,the red,yellow,green,and blue emissions were displayed due to the AIE effect.Structural analysis,coupled with theoretical calculations,revealed that the increase in the size of sp2 domains would lower the Eg and cause a red-shift emission wavelength.Significantly,the continuous emission of M-CDs from blue to red can be utilized as ink for multimode printing,enabling the creation of a variety of school badges and quick response codes.These findings hold promising implications for multi-information encryption applications.

关 键 词：aggregation-induced emission(AIE) luminescence mechanism multi-color emission information encryption. 

分 类 号：O62[理学—有机化学]