期刊
SMALL
卷 12, 期 3, 页码 397-404出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201502107
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类别
资金
- 973 Program - MOST [2012CB921900, 2015CB932200]
- National Natural Science Foundation of China [61138004, 11274180, 11304147]
- Research Fund for Doctoral Program of Higher Education [20130031110010]
- Natural Science Foundation of Jiangsu Province [BM2012010]
- International Cooperation Program
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.
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