期刊
CHEMICAL SCIENCE
卷 8, 期 7, 页码 5050-5056出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sc01393k
关键词
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资金
- 973 program of MOST [2014CB845605]
- NSFC [21390392, 21473205, U1305244, 21325104]
- CAS/SAFEA International Partnership Program for Creative Research Teams
- Strategic Priority Research Program of the CAS [XDA09030307, XDB20000000]
- Youth Innovation Promotion Association of CAS
- Natural Science Foundation of Fujian Province [2017I0018, 2017J01038]
Energy transfer (ET) is of fundamental importance in tuning the optical performance of lanthanide-doped upconversion nanoparticles (UCNPs). However, the fine control and manipulation of the ETs particularly for deleterious cross-relaxation type ETs (CR-ETs) in lanthanide-doped UCNPs remains a formidable challenge to date. Herein, we demonstrate a rational design strategy to manipulate the deleterious CR-ETs in lanthanide-doped UCNPs, by fine-tuning the distances at an extremely large length scale (>20 nm) among multiple lanthanide dopants that are simultaneously embedded into one single nanoparticle with specially designed multilayer nanostructures. The successful inhibition of the CR-ETs leads to a significantly enhanced upconversion luminescence signal with an intensity similar to 70 times higher than that of co-doped conventional UCNPs. This finding paves a new way for the better control of the ETs in lanthanide-doped nanoparticles, and offers the possibility of constructing a series of promising single-nanocrystal-based anti-counterfeiting barcodes with well-identified UC emission color and lifetime outputs.
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