Local-field Enhancement Influenced on Eu3+ Fluorescence in the Vicinity of Au Nanoparticles in Sol-Gel Derived B2O3-SiO2 Glass
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The photoluminescence of trivalent europium (Eu3+) ions in the vicinity of nanometer-sized gold (Au) particles in glasses has been investigated. Au nanoparticles, synthesized in liquid, are introduced into a borosilicate (B2O3-SiO2) glass matrix together with Eu3+ ions via a sol-gel route. Polyvinylpyrrolidone (PVP) is utilized to control the size and protect the Au colloids. It is revealed that a heat treatment of the gel at 400°C leads to a great enhancement of Eu3+ fluorescence under a long ultraviolet excitation, which is six times higher than without polymer-protected Au nanoparticles. We shall also discuss the effects of a broad photoluminescence due to carboynyl moieties (>C=O) attached in the protective polymer and energy transfer from >C=O to Eu3+ ions in enhanced local fields around Au nanoparticles.
- 公益社団法人 日本セラミックス協会の論文
公益社団法人 日本セラミックス協会 | 論文
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