NDLI: One-Step Preparation and Fluorescence Enhancement Effect in SiO$

Content Provider	Springer Nature Link
Author	Zhang, Dekai Hu, Xiaoyun Liu, Enzhou Ji, Ruonan Zhan, Suchang Jing, Guangyin Fan, Jun Hou, Xun
Copyright Year	2013
Abstract	Eu$^{2+}$ single-doped SiO$_{2}$ (SiO$_{2}$/Eu$^{2+}$) and Eu$^{2+}$, Ag nanowires co-doped SiO$_{2}$ (SiO$_{2}$/Eu$^{2+}$–Ag) luminescent nanomaterials were prepared by an efficient one-step sol–gel method. Their microstructure and optical properties were characterized, and the fluorescence enhancement of Eu$^{2+}$ by Ag nanowires was investigated. The experimental results indicate that the average diameter of Ag nanowires doped is 12.5 nm, and the length–diameter ratio is 30. The Ag nanowires cannot only enhance the light absorption of SiO$_{2}$/Eu$^{2+}$ in the range of 230–350 nm, but also reduce the fluorescence lifetime of Eu$^{2+}$. More importantly, the emission intensity is enhanced after doping Ag nanowires, and the red shift phenomenon of the emission spectrum is observed, red shift occurs between 10 and 56 nm. The highest fluorescence intensity is accessed under the Ag doping concentration of 0.10 %. Additionally, the emission of SiO$_{2}$/Eu$^{2+}$ with 0.10 % of Ag doping at 456 nm is 16 times stronger than that of pure SiO$_{2}$/Eu$^{2+}$. The present results indicate that the fluorescence enhancement is attributed to the local field enhancement and the increased radiative decay rates induced by Ag nanowires.
Starting Page	969
Ending Page	974
Page Count	6
File Format	PDF
ISSN	15571955
Journal	Plasmonics
Volume Number	8
Issue Number	2
e-ISSN	15571963
Language	English
Publisher	Springer US
Publisher Date	2013-02-19
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Rare earth doping Localized surface plasmon resonance Radiative decay rates Luminescence Ag nanowires Biotechnology Nanotechnology Biophysics and Biological Physics Biochemistry
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Biochemistry Biophysics Biotechnology

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