title: Wide-Range Tunable Fluorescence Lifetime and Ultrabright Luminescence of Eu-Grafted Plasmonic Core-Shell Nanoparticles for Multiplexing.
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."
authors.affiliation: Ministry of Education and Teda Applied Physics Institute, Nankai University, Tianjin, 300457, P. R. China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Ministry of Education and Teda Applied Physics Institute, Nankai University, Tianjin, 300457, P. R. China.
authors.forename: Feng
authors.initials: F
authors.lastname: Song
authors.affiliation: Department of Material Science and Engineering, South University of Science and Technology of China, Shenzhen, 518055, P. R. China.
authors.forename: Zhubing
authors.initials: Z
authors.lastname: He
authors.affiliation: 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.
authors.forename: Yanling
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Ministry of Education and Teda Applied Physics Institute, Nankai University, Tianjin, 300457, P. R. China.
authors.forename: Zhanyao
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Ministry of Education and Teda Applied Physics Institute, Nankai University, Tianjin, 300457, P. R. China.
authors.forename: Shangxin
authors.initials: S
authors.lastname: Lin
authors.affiliation: 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.
authors.forename: Ling
authors.initials: L
authors.lastname: Huang
authors.affiliation: Ministry of Education and Teda Applied Physics Institute, Nankai University, Tianjin, 300457, 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.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
keywords: core-shell nanoparticles; fluorescence lifetime; lanthanide fluorophores; luminescence; optical multiplexing; plasmonic nanoparticles