期刊
JOURNAL OF LUMINESCENCE
卷 147, 期 -, 页码 72-76出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2013.10.062
关键词
Up-conversion; NaYF4:Yb3+/Er3+; Silica shell thickness; Ag@SiO2 NPs; Plasmonic enhancement
类别
资金
- National Basic Research Program of China [2011CBA00706, 2011CBA00707]
- Hi-Tech Research and Development Program of China [2013AA050302]
- Science and Technology Support Program of Tianjin [12ZCZDGX03600]
- Major Science and Technology Support Project of Tianjin City [11TXSYGX22100]
- Specialized Research Fund for the PhD Program of Higher Education [20120031110039]
Ag@SiO2 nanoparticles (NPs) are proposed and synthesized to enhance beta-NaYE4:Yb3+/Er3+ luminescence by mixing with beta-NaYF4:Yb3+/Er3+ in the solution. Luminescence enhancements are found to be dependent on the amount of addition and the silica shell thickness of the Ag@SiO2 NPs. For the same silica shell thickness of Ag@SiO2 NPs, the optimum mass ratio of Ag@SiO2/microcrystals for the enhancement is 1:21500. For different silica shell thickness of Ag@SiO2 NPs, the maximum luminescence enhancement occurs at the silica shell thickness of 8 nm under the condition of optimal mass, an overall enhancement factor of 3.5 fold is obtained. (C) 2013 Elsevier B.V. All rights reserved.
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