Local structure of nanocrystalline Lu2O3 : Eu studied by X-ray absorption spectroscopy
Qi, ZM; Liu, M; Chen, YH; Zhang, GB; Xu, M; Shi, CS; Zhang, WP; Yin, M; Xie, YN; Xie YN(谢亚宁)
刊名JOURNAL OF PHYSICAL CHEMISTRY C
2007
卷号111期号:5页码:1945-1950
学科分类Chemistry; Science & Technology - Other Topics; Materials Science
DOI10.1021/jp066937p
通讯作者Univ Sci & Technol China, Natl Synchrontron Radiat Lab, Hefei 230026, Anhui, Peoples R China ; Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
文章类型Article
英文摘要Eu-doped nanocrystalline Lu2O3 with different particle sizes was prepared by combustion synthesis. The local structures around the rare-earth Lu and Eu ions were studied by using both Lu and Eu L-3 edge X-ray absorption spectroscopy. According to the extended X-ray absorption fine structure (EXAFS) analysis, detailed local structure information such as coordination numbers, bonding length, and disorder has been obtained. The results showed that the samples with a particle size larger than 5 nm keep the cubic structure and the disorder increases with decreasing size. However, when the particle size is smaller than 5 nm, the existence of considerable amorphous components accounts for the rough interface and the obvious change of the local structure around the rare-earth ions. A new type of coordination environment around Eu was formed, and the most probable symmetry of the Eu3+ site was determined by combining the real-space self-consistent field full multiple scattering X-ray absorption near edge structure (XANES) calculation and the EXAFS result. The local structure information obtained from EXAFS and XANES was used to explain the size-dependent luminescent properties of the nanocrystalline Lu2O3:Eu. The decreasing intensity ratio between the host absorption band and the Eu3+-O2- charge-transfer state (CTS) band with decreasing particle size can be attributed to a larger disorder and more defects in the small sized samples, while the red shift of the CTS band in the smaller size particles can be ascribed to the longer Eu-O bond length and the higher coordination number.
类目[WOS]Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Science & Technology - Other Topics ; Materials Science
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语种英语
WOS记录号WOS:000245005600018
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/239591
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
中国科学院高能物理研究所_理论物理室
中国科学院高能物理研究所_多学科研究中心
作者单位中国科学院高能物理研究所
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Qi, ZM,Liu, M,Chen, YH,et al. Local structure of nanocrystalline Lu2O3 : Eu studied by X-ray absorption spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2007,111(5):1945-1950.
APA Qi, ZM.,Liu, M.,Chen, YH.,Zhang, GB.,Xu, M.,...&谢亚宁.(2007).Local structure of nanocrystalline Lu2O3 : Eu studied by X-ray absorption spectroscopy.JOURNAL OF PHYSICAL CHEMISTRY C,111(5),1945-1950.
MLA Qi, ZM,et al."Local structure of nanocrystalline Lu2O3 : Eu studied by X-ray absorption spectroscopy".JOURNAL OF PHYSICAL CHEMISTRY C 111.5(2007):1945-1950.
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