Spatially Responsive Multicolor Lanthanide-MOF Heterostructures for Covert Photonic Barcodes |
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| Authors: | Dr Zhenhua Gao Baoyuan Xu Tongjin Zhang Zhen Liu Weiguang Zhang Xun Sun Yang Liu Dr Xue Wang Dr Zifei Wang Prof Yongli Yan Prof Fengqin Hu Prof Xiangeng Meng Prof Yong Sheng Zhao |
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| Institution: | 1. School of Materials Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353 Shandong Province, China;2. Key Laboratory of photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 China;3. College of Chemistry, Beijing Normal University, Beijing, 100875 China |
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| Abstract: | Micro/nanoscale photonic barcodes based on multicolor luminescent segmented heterojunctions hold potential for applications in information security. However, such multicolor heterojunctions reported thus far are exclusively based on static luminescent signals, thus restricting their application in advanced confidential information protection. Reported here is a strategy to design responsive photonic barcodes with heterobimetallic (Tb3+/Eu3+) metal—organic framework multicolor heterostructures. The spatial colors could be precisely controlled by thermally manipulating the energy-transfer process between the two lanthanides, thus achieving responsive covert photonic barcodes. Also demonstrated is that spatially resolved responsive barcodes with multi-responsive features could be created in a single heterostructure. These findings offer unique opportunities to purposely design highly integrated responsive microstructures and smart devices toward advanced anti-counterfeiting applications. |
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| Keywords: | energy transfer lanthanides metal–organic frameworks microstructures photons |
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