Upconversion nanophosphors

Kamimura M, Miyamoto D, Saito Y, Soga K, Nagasaki Y (2008) Design of polyethylene glycol)/streptavidin co-immobilized upconversion nanophosphors and their application to fluorescence biolabeling. Langmuir 24 8864-8870... 

However, such two-step conversion strategies for upconversion nanophosphors have some intrinsic limitations, such as complicated preparation and post-treatment procedures. Therefore, one-pot synthesis of water-soluble and surface-functionalized UCNPs has been attracting more attention. The groups working with Zhang [127] and Liu [128] employed... 

Wu W, Yao L, Yang T, Yin R, Li F, Yu Y. NIR-Ught-induced deformation of cross-linked liquid-crystal polymers using upconversion nanophosphors. J Am Chem Soc 2011 133(40) 15810-3. 

Konishi T, Shimizu K, Saito Y, Saga K. Surface modification of upconversion nanophosphors with poly(acrylic acid). J Photopolym Sci Technol 2007 20(1) 11. 

Konishi T, Yamada M, Soga K, Matsuura D, Nagasaki Y. PEG-based surface modification on upconversion nanophosphors for bio-imaging under IR excitation. J Photopolym Sci Technol 2006 19(2) 145. 

Finally, in contrast to the conventional anti-Stokes probes, such as two-phonon absorption or second harmonic generation, upconversion nanophosphors exhibit higher emission efficiency and can be excited by continuous-wave laser rather than the costly femtosecond pulsed laser. 

Yang Y (2014) Upconversion nanophosphors for use in bioemaging, therapy, drug delivery and bioassays. Microchim Acta 181 263-294... 

To accelerate the photoresponse of crosslinked PLCP Alms, upconversion nanophosphors were coated on the surface of one crosslinked PLCP film [48]. The resultant bilayer film showed fast bending upon exposure to near-IR light at 980 nm, because the upconversion luminescence of the nanophosphors leads to trans-cis photoisomerization of the azotolane units and the alignment change of the mesogens. Similar to the photoresponse of crosslinked PLCP films, the bent film completely reverted to the initial fiat state after the removal of the IR light. 

PET Positron Emission Tomography UCNPs Upconversion Nanophosphors... 

Liu XM, Zhao JW, Sun YJ et al (2009) lonothermal synthesis of hexagonal-phase NaYp4 Yb ", Er /Tm upconversion nanophosphors. Chem Commun 6628-6630... 

Liu, Q Feng, W and Li, F. (2014) Water-soluble lanthanide upconversion nanophosphores synthesis and bioimaging in vivo. Coord. Chem. Rev., 273-274, 100-110. 

Shan J. N., J. B. Chen, J. Meng, J. Collins, W. Sohoyejo, J. S. Friedherg and Y. G. Ju, Biofunctionahzation, cytotoxicity, and ceU uptake of lanthanide doped hydrophohicaUy hgated NaYF4 upconversion nanophosphors, J. AppL Phys., 104 (2008). 

Zako T., H. Nagata, N. Terada, M. Sakono, K. Soga and M. Maeda, Improvement of dispersion stability and characterization of upconversion nanophosphors covalently modified with PEG as a fluorescence bioimaging probe, J. Mater. Set, 43, 5325-5330 (2008). 

Xiong L. Q., T. S. Yang, Y. Yang, C. J. Xu and F. Y. Li, Long-term in vivo biodistribution imaging and toxicity of polyacrylic acid-coated upconversion nanophosphors, Biomaterials, 31, 7078-7085 (2010). 

Yang T. S., Y. Sun, Q. Liu, W. Feng, P. Y. Yang and F. Y. Li, Cubic sub-20 nmNaLuF4-based upconversion nanophosphors for high-contrast bioimaging in different animal species. 

Zhang C., L. D. Sun, Y. W. Zhang and C. H. Yan, Rare earth upconversion nanophosphors synthesis, functionalization and application as biolabels and energy transfer donors, J. Rare Earths, 28, 807 819 (2010). 

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