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Title: Mechanistic investigation of photon upconversion in Nd3+- sensitized core-shell nanoparticles
Authors: Xie, X.
Gao, N.
Deng, R.
Sun, Q.
Xu, Q.-H. 
Liu, X. 
Issue Date: 28-Aug-2013
Citation: Xie, X., Gao, N., Deng, R., Sun, Q., Xu, Q.-H., Liu, X. (2013-08-28). Mechanistic investigation of photon upconversion in Nd3+- sensitized core-shell nanoparticles. Journal of the American Chemical Society 135 (34) : 12608-12611. ScholarBank@NUS Repository.
Abstract: A new type of core-shell upconversion nanoparticles which can be effectively excited at 795 nm has been designed and synthesized through spatially confined doping of neodymium (Nd3+) ions. The use of Nd3+ ions as sensitizers facilitates the energy transfer and photon upconversion of a series of lanthanide activators (Er3+, Tm 3+, and Ho3+) at a biocompatible excitation wavelength (795 nm) and also significantly minimizes the overheating problem associated with conventional 980 nm excitation. Importantly, the core-shell design enabled high-concentration doping of Nd3+ (∼20 mol %) in the shell layer and thus markedly enhanced the upconversion emission from the activators, providing highly attractive luminescent biomarkers for bioimaging without autofluorescence and concern of overheating. © 2013 American Chemical Society.
Source Title: Journal of the American Chemical Society
ISSN: 00027863
DOI: 10.1021/ja4075002
Appears in Collections:Staff Publications

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