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Journal Reference
Small. 2016 Jan;12(3):397-404.
Zhang J1, Song F1, He Z2, Liu Y3, Chen Z1, Lin S1, Huang L3, Huang W1,3
[expand title=”Show Affiliations”]- Ministry of Education and Teda Applied Physics Institute, Nankai University, Tianjin, 300457, P. R. China.
- Department of Material Science and Engineering, South University of Science and Technology of China, Shenzhen, 518055, P. R. China.
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing, 211816, P. R. China. [/expand]
Abstract
Wide-range, well-separated, and tunable lifetime nanocomposites with ultrabright fluorescence are highly desirable for applications in optical multiplexing such as multiplexed biological detection, data storage, and security printing. Here, a synthesis of tunable fluorescence lifetime nanocomposites is reported featuring europium chelate grafted onto the surface of plasmonic core-shell nanoparticles, and systematically investigated their optical performance. In a single red color emission channel, more than 12 distinct fluorescence lifetime populations with high fluorescence efficiency (up to 73%) are reported. The fluorescence lifetime of Eu-grafted core-shell nanoparticles exhibits a wider tunable range, possesses larger lifetime interval and is more sensitive to separation distance than that of ordinary Eu-doping core-shell type. These superior performances are attributed to the unique nanostructure of Eu-grafed type. In addition, these as-prepared nanocomposites are used for security printing to demonstrate optical multiplexing applications. The optical multiplexing experiments show an interesting pseudo-information “a rabbit in a well” and conceal the real message “NKU.”
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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