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	Site selective excitation in La2O3 : Eu3+ nanoparticles
	Chang, Jianjun ; Xiong, Sha ; Peng, Hongshang ; Sun, Lingdong ; Lu, Shaozhe ; You, Fangtian ; Huang, Shhua
	2007
关键词	nanoparticles La2O3 : Eu3+ laser selective excitation NANOCRYSTALS EU3+
英文摘要	Eu3+ is a favorite fluorescence probe for studying local structure in solids. In this report, Eu3+ ions in La-O-2(3) nanoparticles were selectively excited; variation of the Eu emission spectra with the excitation wavelengths was observed. It was found that emission spectrum of the Eu ions near the center of the nanocrystals was similar to that of the bulk, where the Eu ions locate at the C-3v symmetry site. By tuning the excitation wavelength, Eu ions in the vicinity of the particle surface may be selectively excited. A gradual variation in emission line positions was observed. Moreover, surface provided an additional non-radiative transition route for the rare-earth fluorescence, shortening the 5 Do lifetime from 1.25 to 0.87ms. (c) 2006 Elsevier B.V. All rights reserved.; Optics; SCI(E); EI; CPCI-S(ISTP); 0
语种	英语
DOI标识	10.1016/j.jlumin.2006.01.305
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/251072]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Chang, Jianjun,Xiong, Sha,Peng, Hongshang,et al. Site selective excitation in La2O3 : Eu3+ nanoparticles. 2007-01-01.

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