Photon upconversion in Yb3+-Tb3+ and Yb3+-Eu3+ activated core/shell   nanoparticles with dual-band excitation

doi:10.1039/c6tc00413j

CORC > 北京大学 > 化学与分子工程学院

	Photon upconversion in Yb3+-Tb3+ and Yb3+-Eu3+ activated core/shell nanoparticles with dual-band excitation
	Dong, Hao ; Sun, Ling-Dong ; Wang, Ye-Fu ; Xiao, Jia-Wen ; Tu, Datao ; Chen, Xueyuan ; Yan, Chun-Hua
刊名	JOURNAL OF MATERIALS CHEMISTRY C
	2016
关键词	CORE-SHELL NANOPARTICLES NEAR-INFRARED LIGHT SINGLE-WAVELENGTH EXCITATION COOPERATIVE ENERGY-TRANSFER IN-VIVO PHOTODYNAMIC THERAPY LANTHANIDE NANOCRYSTALS LUMINESCENCE EMISSION
DOI	10.1039/c6tc00413j
英文摘要	Exploring novel lanthanide-activated upconversion nanoparticles with distinctive spectral fingerprints and emission lifetimes has long been a great concern for extended optical applications. Herein, we report the study of photon upconversion emissions in Yb3+-Tb3+ and Yb3+-Eu3+ activated nanoparticles with near-infrared excitation. In these nanoparticles, a high content of Yb3+ is required for the simultaneous excitation of two Yb3+ ions, yielding a Yb3+ dimer with a higher excited energy to upconvert photons onto Tb3+ and Eu3+. The optimum doping concentration of Yb3+ ions for Yb3+-Tb3+ and Yb3+-Eu3+ pairs was determined to be 80% and 60%, respectively, which are much higher than that of Yb3+-Er3+/Tm3+ pairs. Notably, the upconversion emission lifetime of the as-prepared nanoparticles was prolonged to 2.3 ms (Tb3+) and 4.0 ms (Eu3+), respectively. Through the epitaxial growth of a Nd3+ doped shell layer, the upconversion emissions of Tb3+ and Eu3+ were intensified 25-fold. At the same time, an extra excitation band in the shorter near-infrared region from Nd3+ at 808 nm was achieved. Moreover, the emissions of Tm3+ were employed to compensate for those of Tb3+ and Eu3+ for multicolor emissions. These results highlight the upconversion emissions of Tb3+ and Eu3+ for potential multicolor imaging and multiplexed detection applications.; NSFC [21425101, 21371011, 21331001, 21321001, 91422302]; MOST of China [2014CB643800]; SCI(E); ARTICLE; sun@pku.edu.cn; yan@pku.edu.cn; 19; 4186-4192; 4
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/438848]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Dong, Hao,Sun, Ling-Dong,Wang, Ye-Fu,et al. Photon upconversion in Yb3+-Tb3+ and Yb3+-Eu3+ activated core/shell nanoparticles with dual-band excitation[J]. JOURNAL OF MATERIALS CHEMISTRY C,2016.
APA	Dong, Hao.,Sun, Ling-Dong.,Wang, Ye-Fu.,Xiao, Jia-Wen.,Tu, Datao.,...&Yan, Chun-Hua.(2016).Photon upconversion in Yb3+-Tb3+ and Yb3+-Eu3+ activated core/shell nanoparticles with dual-band excitation.JOURNAL OF MATERIALS CHEMISTRY C.
MLA	Dong, Hao,et al."Photon upconversion in Yb3+-Tb3+ and Yb3+-Eu3+ activated core/shell nanoparticles with dual-band excitation".JOURNAL OF MATERIALS CHEMISTRY C (2016).