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|Title:||Mechanistic investigation of photon upconversion in Nd3+- sensitized core-shell nanoparticles||Authors:||Xie, 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. https://doi.org/10.1021/ja4075002||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||URI:||http://scholarbank.nus.edu.sg/handle/10635/94194||ISSN:||00027863||DOI:||10.1021/ja4075002|
|Appears in Collections:||Staff Publications|
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