The influence of Ag species on spectroscopic features of Tb^3 +-activated sodium-aluminosilicate glasses via Ag⁺-Na⁺ ion exchange

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• 作者：Longji Li ; Yong Yang ; Dacheng Zhou ; Xuhui Xu ; Jianbei Qiu
• 关键词：Glass ; Ion exchange ; Energy transfer ; Silver nanoparticle ; Terbium ions
• 刊名：Journal of Non-Crystalline Solids
• 出版年：1 February, 2014
• 年：2014
• 卷：385
• 期：Complete
• 页码：95-99
• 全文大小：929 K

文摘

Different ionic silver species and Ag nanoparticles (Ag NPs) were prepared by Ag⁺-Na⁺ ion exchange method in Tb^3 +-doped sodium-aluminosilicate glasses, and the interaction between Ag species and Tb^3 + ions was studied. Two excitation peaks centered at 280 nm and 375 nm which ascribed to Ag⁺ and Ag aggregates (Ag₂⁺, Ag₃⁺鈥? respectively were observed in as-made glasses. Owing to energy transfer (ET) from Ag⁺/silver aggregates to Tb^3 +, significant enhancements of Tb^3 + emission were observed under certain excitation. After heat treatment, the results of absorption spectrum and TEM patterns revealed that silver nanoparticles (Ag NPs) with diameter of about 5 nm were formed in glasses, and it was found that the Ag NPs led to a significant enhancement in Tb^3 + luminescence under 375 nm excitation. A possible mechanism of energy transfer from Ag species to Tb^3 + ions was proposed.