[1] [1] I J Fox, L G S Brooker, D W Heseltine, et al.. New dyes for continuous recording of dilution curves in whole blood independent of variations in blood oxygen saturation [J]. Am J Physiol, 1956, 187(3): 599-606.

[2] [2] M Nichkova, D Dosev, S J Gee, et al.. Microarray immunoassay for phenoxybenzoic acid using polymer encapsulated EuGd2O3 nanoparticles as fluorescent labels [J]. Anal Chem, 2005, 77(21): 6864-6873.

[3] [3] J Q Gu, J Shen, L D Sun, et al.. Resonance energy transfer in steady-state and time-decay fluoro-immunoassays for lanthanide nanoparticles based on biotin and avidin affinity [J]. J Phys Chem, 2008, 112(17): 6589-6593.

[4] [4] G S Yi, H C Lu, S Y Zhao, et al.. Synthesis, characterization, and biological application of size-controlled nanocrystalline NaYF4Yb, Er infrared-to-visible up-conversion phosphors [J]. Nano Lett, 2004, 4(11): 2191-2196.

[5] [5] L Y Wang, R X Yan, Z Y Huo, et al.. Fluorescence resonant energy transfer biosensor based on upconversion-luminescent nanoparticles [J]. Angew Chem Int Ed, 2005, 44(37): 6054-6057.

[6] [6] D Y Kong, Z W Quan, J Yang, et al.. Avidin conjugation to up-conversion phosphor NaYF4Yb3+, Er3+ by the oxidation of the oligosaccharide chains [J]. J Nanopart Res, 2009, 11(4): 821-829.

[7] [7] Z G Chen, H L Chen, H Hu, et al.. Versatile synthesis strategy for carboxylic acid-functionalized upconverting nanophosphors as biological labels [J]. J Am Chem Soc, 2008, 130(10): 3023-3029.

[8] [8] Mi Congcong, Gao Huanyu, He Zhe, et al.. Synthesis of NaGdF4Yb, Er nanoparticles and their application in cell biolabeling [J]. Journal of Northeastern University (Natural Science), 2011, 32(7): 981-984.

[9] [9] Shan Shuang, Wu Hao, Tan Mingqian, et al.. Preparation and biological application of rare earth upconversion fluorescent nanomaterials [J]. Progress in Biochemistry and Biophysics, 2013, 40(10): 925-934.

[10] [10] M Wang, G Abbineni, A Clevenger, et al.. Upconversion nanoparticles: synthesis, surface modification and biological applications [J]. Nanomedicine: Nanotechnology, Biology, and Medicine, 2011, 7(6): 710-729.

[11] [11] J S Wang, Z W Wang, X Li, et al.. Energy transfer from benzoic acid to lanthanide ions in benzoic acid-functionalized lanthanide-doped CaF2 nanoparticles [J]. Appl Surf Sci, 2011, 257(16): 7145-7149.

[12] [12] Liu Jihong, Hou Suying, Xu Wei, et al.. Synthesis and luminescent properties of CaF2 and CaF2Yb3+ mulberry-like nanostructures [J]. Chemical J Chinese Universities, 2011, 32(8): 1680-1683.

[13] [13] N N Dong, M Pedroni, F Piccinelli, et al.. NIR-to-NIR two-photon excited CaF2Tm3+, Yb3+ nanoparticles: multifunctional nanoprobes for highly penetrating fluorescence bio-imaging [J]. ACS Nano, 2011, 5(11): 8665-8671.

[14] [14] Tian Qingzhen, Miao Hongli, Sun Haigang, et al.. Luminescence characteristics of YAGCe3+(Ga, Pr) phosphor [J]. Acta Optica Sinica, 2012, 32(s1): s116005.

[15] [15] Fan Ting, Lü Jiantao. Preparation and photoluminescence property of ZnWO4Eu3+ nanords [J]. Acta Optica Sinica, 2013, 33(8): 0816003.

[16] [16] Fan Ting, Lü Jiantao, Li Na. Mechanism for 1 μm photoluminesce in Yb3+/Li+ codoped Y2O3 nanoparticles [J]. Acta Optica Sinica, 2013, 33(s1): s116003.

[17] [17] Yin Yidong, Hong Guangyan. Morphology control of lanthanum hydroxide nanorods synthesized by hydrothermal microemulsion method [J]. Chemical J Chinese Universities, 2005, 26(10): 1795-1797

[18] [18] Liu Defei, Huang Huimin, Zhang Yuying, et al.. Preparation of core-shell TiO2/Al2O3 nano-material with microemulsion-hydrothermal method [J]. Bulletin of the Chinese Ceramic Society, 2008, 27(6): 1225-1229.

[19] [19] M H Zori. Synthesis of TiO2 nanoparticles by microemulsion/heat treated method and photodegradation of methylene blue [J]. J Inorg Organomet P, 2011, 21(1): 81-90.

[20] [20] H Guo. Photoluminescent properties of CeF3Tb3+ nanodiskettes prepared by hydrothermal microemulsion [J]. Appl Phys B, 2006, 84(1-2): 365-369.

[21] [21] Zhang Yan, Mei Bingchu, Wang Si, et al.. Preparation of CaF2 nanometer powders and fluorescence performance of CaF2/Er3+ nanometer powders [J]. Chinese J Synthetic Chemistry, 2011, 19(2): 225-228.

[22] [22] P Aubry, A Bensalah, P Gredin, et al.. Synthesis and optical characterizations of Yb-doped CaF2 ceramics [J]. Opt Mater, 2009, 31(5): 750-753.

[23] [23] M Mortier, A Bensalah, G Dantelle, et al.. Rare-earth doped oxyfluoride glass-ceramics and fluoride ceramics: synthesis and optical properties [J]. Opt Mater, 2007, 29(10): 1263-1270.

[24] [24] C Furetta, Y K Lee. Further studies of the dosimetric properties of CaF2Tm (TLD-300) [J]. Radiat Prot Dosim, 1985, 11(2): 101-105.

[25] [25] Xian Jianbo, Zhang Xiangyan, Du Haiyan, et al.. Research progress of preparation methods and application of MF2 type rare-earth fluorescent nanomaterials [J]. New Chemical Materials, 2011, 39(1): 6-8, 49.

[26] [26] B C Hong, K Kawano. Syntheses of Eu-activated alkaline earth fluoride MF2 (M=Ca, Sr) nanoparticles [J]. Jpn J Appl Phys, 2007, 46(9B): 6319-6323.

[27] [27] G F Wang, Q Peng, Y D Li. Upconversion luminescence of monodisperse CaF2Yb3+/Er3+ nanocrystals [J]. J Am Chem Soc, 2009, 131(40): 14200-14201.

[28] [28] C M Zhang, Z Y Hou, R T Chai, et al.. Mesoporous SrF2 and SrF2Ln3+ (Ln=Ce, Tb, Yb, Er) hierarchical microspheres: hydrothermal synthesis, growing mechanism, and luminescent properties [J]. J Phys Chem C, 2010, 114(15): 6928-6936.

[29] [29] L M Song, L Xue. Efficient fluorescence of dissolved CaF2Tb3+ and CaF2Ce3+, Tb3+ nanoparticles through surface coating sensitization [J]. Appl Surf Sci, 2012, 258(8): 3497-3501.

[30] [30] Qiu Guiming, Xu Chengke, Yang Yingquan. Synthesis and photoluminescence of ZnMoO4Tb3+, K+ phosphors for LED [J]. Optoelectronic Technology, 2011, 31(2): 125-128.

[31] [31] J S Liao, B Qiu, H R Wen, et al.. Synthesis and optimum luminescence of monodispersed spheres for BaWO4-based green phosphors with doping of Tb3+ [J]. J Lumin, 2010, 130(5): 762-766.

[32] [32] Sun Jutang, Qin Zibin, Feng Yili. Spectroscopy of Tb3+-doped alkali-earth metal tungstates [J]. Chinese J Luminescence, 1992, 13(4): 333-340.

[33] [33] Yang Shuijin. Synthesis and luminescence properties of Tb3+-activated lanthanum halotungstate phosphors [J]. Songliao Journal (Natural Science Edition), 1996, (2): 74-77, 82.

[34] [34] A B Van Oosterhout. An abinitio calculation on the WO6+6 octahedron with an application to its luminescence [J]. J Chem Phys, 1977, 67(6): 2412-2418.

[35] [35] Zhang Chunfeng, Bai Yuqin, Song Lihong, et al.. Synthesis and spectrum characteristics of YF3Tb phosphor [J]. Journal of Changchun University of Science and Technology (Natural Science Edition), 2009, 32(2): 323-325.

[36] [36] Cheng Zhiming, Zhang Fujun. Synthesis of rare earth complex Tb (aca)3phen and its luminescent performance characterization [J]. Acta Optica Sinica, 2013, 33(7): 0716002.

[37] [37] Kang Kai, Zhuang Weidong, He Dawei, et al.. Luminescent properties and preparation of CeMgAl11O9Tb green phosphor [J]. Journal of the Chinese Rare Earth Society, 2004, 22(2): 206-209.

[38] [38] Sun Yimin, Teng Xiaoming, Zhuang Weidong, et al.. Luminescence and energy transfer in (Ce, Tb) MgAl11O19 [J]. Journal of Anhui Normal University (Natural Science), 2005, 28(1): 56-60.

[39] [39] Li Xu, Guan Li, Liu Chong, et al.. Spectral properties and energy transfer of Ce3+ and Tb3+ ions co-doped Ca2SrAl2O6 phosphor [J]. Spectroscopy and Spectral Analysis, 2010, 30(6): 1535-1538.

[40] [40] Xu Chengke, Qiu Guiming, Huang Chong. Preparation of ZnMoO4Tb3+ green phosphor and the study of its luminescence characteristics [J]. Optoelectronic Technology, 2010, 30(1): 37-44.

[41] [41] Wang Wenyun, Yu Jiaolu, Yu Yingning, et al.. The measurement and study of fluorescence lifetimes of molecules and ions [J]. Laser Journal, 1993, 14(3): 127-130.

[42] [42] Q G Wang, L B Su, H J Li, et al.. Optical spectra and excited state relaxation dynamics of Nd3+ in CaF2 single crystal [J]. J Alloys Compd, 2011, 509(36): 8880-8884.