Distance Dependence of Gold-Enhanced Upconversion luminescence in Au/SiO2/Y2O3:Yb3+, Er3+ Nanoparticles

被引：93

作者：

Ge, W. ^{[1
]}

Zhang, X. R. ^{[2
]}

Liu, M. ^{[1
]}

Lei, Z. W. ^{[1
]}

Knize, R. J. ^{[3
]}

Lu, Yalin ^{[1
,2
,3
]}

机构：

[1] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China

[2] Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

[3] USAF Acad, Dept Phys, Laser Opt Res Ctr, Colorado Springs, CO 80840 USA

来源：

THERANOSTICS | 2013年 / 3卷 / 04期

基金：

中国博士后科学基金;

关键词：

Plasmon coupling; Core/spacer/shell; Rare earth; Luminescence; Decay trace; FLUORESCENCE; NANOCRYSTALS; PHOTOLUMINESCENCE; CORE; SIZE;

D O I：

10.7150/thno.5523

中图分类号：

R-3 [医学研究方法]; R3 [基础医学];

学科分类号：

1001 ;

摘要：

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.

引用

页码：282 / 288

页数：7

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