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. 2016 Jul 13;6:29746. doi: 10.1038/srep29746

Figure 1.

Figure 1

The general idea of the NaYF4:Tm3+,Yb3+ NPs loaded oil-core polyelectrolyte nanocapsules fabrication via two-step process: emulsification/solvent evapoaration (a) and LbL (b) approach.