Please use this identifier to cite or link to this item: https://doi.org/10.1080/00387010.2010.487018
Title: Tunable upconversion emissions from lanthanide-doped monodisperse β-NaYF4 nanoparticles
Authors: Wang, F. 
Wang, J.
Xu, J.
Xue, X.
Chen, H.
Liu, X. 
Keywords: Energy transfer
Lanthanide
Multicolor tuning
NaYF4
Silica coating
Upconversion
Issue Date: 2010
Source: Wang, F., Wang, J., Xu, J., Xue, X., Chen, H., Liu, X. (2010). Tunable upconversion emissions from lanthanide-doped monodisperse β-NaYF4 nanoparticles. Spectroscopy Letters 43 (5) : 400-405. ScholarBank@NUS Repository. https://doi.org/10.1080/00387010.2010.487018
Abstract: We report upconversion multicolor tuning based on uniform β-NaYF4:Yb/Tm/Er nanoparticles. The as-synthesized nanoparticles with an average diameter of 25 nm are well dispersed in a wide range of nonpolar solvents including hexane, cyclohexane, dichloromethane, and toluene. These nanoparticles show intense upconversion emissions and the color output can be precisely modulated by adjusting activator ratios of Tm3+ to Er3+. Dopant-concentration dependent emission properties of the triply doped particle system are also investigated. In addition, we demonstrate that these nanoparticles can be readily transferred to polar solvents such as ethanol and water by growing a thin silica layer (10nm) around the particles, providing potential applications in biological labeling and imaging. © Taylor & Francis Group, LLC.
Source Title: Spectroscopy Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/114414
ISSN: 00387010
DOI: 10.1080/00387010.2010.487018
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