期刊
THERANOSTICS
卷 3, 期 4, 页码 282-288出版社
IVYSPRING INT PUBL
DOI: 10.7150/thno.5523
关键词
Plasmon coupling; Core/spacer/shell; Rare earth; Luminescence; Decay trace
资金
- National Basic Research Program of China (973 Program) [2012CB922003]
- Natural Science Foundation of China [51102224]
- Fundamental Research Fund for the Central Universities [WK2060140006, WK2060140005]
- China Postdoctoral Science Foundation [BH2060140010]
We report a localized surface plasmon enhanced upconversion luminescence in Au/SiO2/Y2O3:Yb3+,Er3+ nanoparticles when excited at 980 nm. By adjusting the silica spacer's thickness, a maximum 9.59-fold enhancement of the green emission was obtained. Effect of the spacer distance on the Au-Y2O3:Yb3+, Er3+ green upconversion mechanism was numerically simulated and experimentally demonstrated. In theory for radiative decay and excitation rates, they can be largely enhanced at the spacer thicknesses of less than 70 and 75 nm, respectively, and the quenching can be caused by the non-radiative energy transferring at the distance of less than 55 nm.
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