References
- F. Auzel, Upconversion and anti-stokes processes with f and d ions in solids, Chem. Rev. 104, 139W22, 173 (2004).
- F. Wang, R. Deng, and X. G. Liu, Preparation of core-shell NaGdF4 nanoparticles doped with luminescent lanthanide ions to be used as upconversion-based probes, Nat. Protoc. 9, 1634–1644 (2014).
- T. S. Yang, Q. Liu, J. C. Li et al., Photoswitchable upconversion nanophosphors for small animal imaging in vivo, RSC Adv. 4, 15613–15619 (2014).
- Z. L. Gao, L. Wang, L. Wang et al., Detection of sulfide ions in red region based on upconverting NaYF4:Yb,Er/NaGdF4 core–shell nanoparticles, J. Name. 00, 1–3 (2013).
- P. Alonso-Cristobal, P. Vilela, A. El-Sagheer et al., Highly sensitive DNA sensor based on upconversion nanoparticles and graphene oxide, Acs Appl. Mater. Interfaces. 7, 12422W22, 12429 (2015).
- H. Li, J. Wang, F. Nan et al., Upconversion luminescence properties of Mn2+-doped NaYF4:Yb/Er nanoparticles, J. Nat. 18, 207–212 (2013).
- X. Guo, S. Wu, N. Duan et al., Mn2+-doped NaYF4:Yb/Er upconversion nanoparticle-based electrochemiluminescent aptasensor for bisphenol A, Anal Bioanal Chem. 408, 3823–3831 (2016).
- Y. L. Dai, P. A. Ma, Z. Y. Cheng et al., Up-Conversion cell imaging and pH induced thermally controlled drug release from NaYF4:Yb3+/Er3+@Hydrogel core-shell hybrid microspheres, ACS. Nano. 6, 3327–3338 (2012).