Structural and luminescent properties of (Eu,Tb)PO₄¡¤H₂O nanorods/nanowires prepared by microwave technique

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• 作者：Nguyen Thanh Huong^a ; ^{nthuong@ims.vast.ac.vn} ; Nguyen Duc Van^a ; Dinh Manh Tien^a ; Do Khanh Tung^a ; Nguyen Thanh Binh^a ; Tran Kim Anh^a ; Le Quoc Minh^a ; ^b
• 关键词：microwave technique ; nanowires/nanorods ; energy transfer ; fluorescence spectroscopy ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：29
• 期：12
• 页码：1170-1173
• 全文大小：714 K

文摘

Nanowires/nanorods of europium/terbium orthophosphate monohydrate with Eu³⁺ concentration of 6, 11, and 20 at. % were prepared by microwave synthesis method. The effects of Eu³⁺ doping concentration on structure, morphology and optical properties of nanomaterials were also investigated. The results showed that, for all studied Eu³⁺ doping concentrations, a single-crystalline phase of rhabdophane-type (Eu,Tb)PO₄¡¤H₂O nanowires/nanorods was obtained by using microwave heating of an aqueous solution of terbium(III) nitrate, europium(III) nitrate and NH₄H₂PO₄ with pH=2. The length and width of these nanowires/nanorods ranged from 150 to 300 nm and from 10 to 50 nm, respectively. The evidence of energy transfer from Tb³⁺ to Eu³⁺ due to the energy overlap between the donor Tb³⁺ and the acceptor Eu³⁺ was observed obviously via a significant enhancement in the luminescent intensity of Eu³⁺.