Size-dependent microstructure and europium site preference influence   fluorescent properties of Eu3+-doped Ca-10(PO4)(6)(OH)(2) nanocrystal

doi:10.1016/j.jlumin.2007.09.012

CORC > 北京大学 > 化学与分子工程学院

	Size-dependent microstructure and europium site preference influence fluorescent properties of Eu3+-doped Ca-10(PO4)(6)(OH)(2) nanocrystal
	Long, Mei ; Hong, Fashui ; Li, Wei ; Li, Fuchun ; Zhao, Haiyan ; Lv, Yuanqi ; Li, Huixin ; Hu, Feng ; Sun, Lingdong ; Yan, Chunhua ; Wei, Zhenggui
刊名	journal of luminescence
	2008
关键词	nanostructures Eu ions hydroxyapatite fluorescence WET-CHEMICAL SYNTHESIS LUMINESCENT PROPERTIES YBO3-EU NANOCRYSTALS EU3+ LUMINESCENCE BIOLOGICAL PROBE HYDROXYAPATITE PHOSPHATE APATITE IONS NANOPARTICLES
DOI	10.1016/j.jlumin.2007.09.012
英文摘要	In this study, Eu3+-doped nanocrystalline Ca-10(PO4)(6)(OH)(2) (Ca10-xEux(PO4)(6)(OH)(2)) with different particle sizes have been prepared by the thermal decomposition of precursors. Size-dependent microstructure could be observed in nanocrystalline Ca10-xEux(PO4)(6)(OH)(2). The lattices of Ca10-xEux(PO4)(6)(OH)(2) nanocrystals were more distorted in comparison with the bulk, and the smaller the particle size, the more distorted the lattices. Room temperature photoluminescence showed europium site preference was also size-dependent, with the majority of Eu3+ ions occupying Ca(II) sites in the bulk, but more and more Eu3+ ions occupying Ca(I) sites in Ca10-xEux(PO4)(6)(OH)(2) with decreasing particle size. Fluorescent properties of Ca10-xEux(PO4)(6)(OH)(2) were considered to be influenced by both microstructure and site preference of Eu ions. An abnormal strong intensity of D-5(0)-F-7(0) transition was observed in bulk and larger Ca10-xEux(PO4)(6)(OH)(2) nanocrystals, but the relative intensities of D-5(0)-F-7(0) transition to D-5(0)-F-7(1,2,3,4) transition of Eu3+ became weaker as the particle sizes decreased. As the particle sizes became smaller, the ratios of the red emission transition (D-5(0)-F-7(2)) to the orange emission transition (D-5(0)-F-7(1)) (R/O values) first increased by comparing the bulk sample with 96 nm sample, and then decreased by comparing 96 nm sample to 57 nm sample. The quenching concentrations of Ca10-xEux(PO4)(6)(OH)(2) samples increased with decreasing particle size. Possible mechanisms responsible for these phenomena were proposed. Since nanosized Ca10-xEux(PO4)(6)(OH)(2) showed higher fluorescent intensities, higher R/O values and higher quenching concentrations, this material is considered to be a promising phosphor. (C) 2007 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000252566300025&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Optics; SCI(E); EI; 36; ARTICLE; 3; 428-436; 128
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/249251]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Long, Mei,Hong, Fashui,Li, Wei,et al. Size-dependent microstructure and europium site preference influence fluorescent properties of Eu3+-doped Ca-10(PO4)(6)(OH)(2) nanocrystal[J]. journal of luminescence,2008.
APA	Long, Mei.,Hong, Fashui.,Li, Wei.,Li, Fuchun.,Zhao, Haiyan.,...&Wei, Zhenggui.(2008).Size-dependent microstructure and europium site preference influence fluorescent properties of Eu3+-doped Ca-10(PO4)(6)(OH)(2) nanocrystal.journal of luminescence.
MLA	Long, Mei,et al."Size-dependent microstructure and europium site preference influence fluorescent properties of Eu3+-doped Ca-10(PO4)(6)(OH)(2) nanocrystal".journal of luminescence (2008).